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<button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.07785">arXiv:2412.07785</a> <span> [<a href="https://arxiv.org/pdf/2412.07785">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acsaom.4c00132">10.1021/acsaom.4c00132 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Gold diamond Nanocomposites Efficiently Generate Hydrated Electrons upon Absorption of Visible Light </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Orlanducci%2C+S">Silvia Orlanducci</a>, <a href="/search/physics?searchtype=author&query=Ammirati%2C+G">Giuseppe Ammirati</a>, <a href="/search/physics?searchtype=author&query=Bellucci%2C+A">Alessandro Bellucci</a>, <a href="/search/physics?searchtype=author&query=Catone%2C+D">Daniele Catone</a>, <a href="/search/physics?searchtype=author&query=Gontard%2C+L+C">Lionel C. Gontard</a>, <a href="/search/physics?searchtype=author&query=Martelli%2C+F">Faustino Martelli</a>, <a href="/search/physics?searchtype=author&query=Matassa%2C+R">Roberto Matassa</a>, <a href="/search/physics?searchtype=author&query=Paladini%2C+A">Alessandra Paladini</a>, <a href="/search/physics?searchtype=author&query=Toschi%2C+F">Francesco Toschi</a>, <a href="/search/physics?searchtype=author&query=Turchini%2C+S">Stefano Turchini</a>, <a href="/search/physics?searchtype=author&query=O%27Keeffe%2C+P">Patrick O'Keeffe</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2412.07785v1-abstract-short" style="display: inline;"> An efficient source of hydrated electrons generated by visible light has the potential to have a major impact on solar homogeneous catalysis. Diamond has potentially a high capability of emitting hydrated electrons, but only using ultraviolet light (lambda<225 nm). In this work, we demonstrate the efficient absorption of visible light by nanocomposites consisting of detonation nanodiamonds and gol… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.07785v1-abstract-full').style.display = 'inline'; document.getElementById('2412.07785v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.07785v1-abstract-full" style="display: none;"> An efficient source of hydrated electrons generated by visible light has the potential to have a major impact on solar homogeneous catalysis. Diamond has potentially a high capability of emitting hydrated electrons, but only using ultraviolet light (lambda<225 nm). In this work, we demonstrate the efficient absorption of visible light by nanocomposites consisting of detonation nanodiamonds and gold nanoparticles (AuNP@DNDs), which subsequently emit electrons into the aqueous environment in which they are suspended. This has been done by exciting the AuNP@DND with visible laser light and monitoring the appearance and intensity of the transient absorption of hydrated electrons centered at around 720 nm. We suggest that this mechanism is made possible by the plasmonic enhancement of visible absorption by sp2-hybridized islands on the DND surface. Optimization of this process could lead to important breakthroughs in solar photocatalysis of energy-intensive reactions such as N2 and CO2 reduction as well as providing a non-toxic source of hydrated electrons for applications in wastewater management and nanomedicine. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.07785v1-abstract-full').style.display = 'none'; document.getElementById('2412.07785v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> ACS Appl. Opt. Mater. 2024, 2, 6, 1180-1187 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.08502">arXiv:2406.08502</a> <span> [<a href="https://arxiv.org/pdf/2406.08502">pdf</a>, <a href="https://arxiv.org/format/2406.08502">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> </div> <p class="title is-5 mathjax"> Observation of sequential three-body dissociation of camphor molecule -- a native frame approach </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=De%2C+S">S. De</a>, <a href="/search/physics?searchtype=author&query=Mandal%2C+S">S. Mandal</a>, <a href="/search/physics?searchtype=author&query=Sen%2C+S">Sanket Sen</a>, <a href="/search/physics?searchtype=author&query=Sen%2C+A">Arnab Sen</a>, <a href="/search/physics?searchtype=author&query=Gopal%2C+R">R. Gopal</a>, <a href="/search/physics?searchtype=author&query=Ltaief%2C+L+B">L. Ben Ltaief</a>, <a href="/search/physics?searchtype=author&query=Turchini%2C+S">S. Turchini</a>, <a href="/search/physics?searchtype=author&query=Catone%2C+D">D. Catone</a>, <a href="/search/physics?searchtype=author&query=Zema%2C+N">N. Zema</a>, <a href="/search/physics?searchtype=author&query=Coreno%2C+M">M. Coreno</a>, <a href="/search/physics?searchtype=author&query=Richter%2C+R">R. Richter</a>, <a href="/search/physics?searchtype=author&query=Mudrich%2C+M">M. Mudrich</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+V">V. Sharma</a>, <a href="/search/physics?searchtype=author&query=Krishnan%2C+S+R">S. R. Krishnan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2406.08502v2-abstract-short" style="display: inline;"> The three-body dissociation dynamics of the dicationic camphor molecule (C$_{10}$H$_{16}$O$^{2+}$) resulting from Auger decay are investigated using soft X-ray synchrotron radiation. A photoelectron-photoion-photoion coincidence (PEPIPICO) method, a combination of a velocity map imaging (VMI) spectrometer and a time-of-flight (ToF) spectrometer is employed to measure the 3D momenta of ions detecte… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.08502v2-abstract-full').style.display = 'inline'; document.getElementById('2406.08502v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.08502v2-abstract-full" style="display: none;"> The three-body dissociation dynamics of the dicationic camphor molecule (C$_{10}$H$_{16}$O$^{2+}$) resulting from Auger decay are investigated using soft X-ray synchrotron radiation. A photoelectron-photoion-photoion coincidence (PEPIPICO) method, a combination of a velocity map imaging (VMI) spectrometer and a time-of-flight (ToF) spectrometer is employed to measure the 3D momenta of ions detected in coincidence. The ion mass spectra and the ion-ion coincidence map at photon energies of 287.9 eV (below the C 1s ionization potential) and 292.4 eV (above the C 1s ionization potential for skeletal carbon) reveal that fragmentation depends on the final dicationic state rather than the initial excitation. Using the native frame method, three new fragmentation channels are discussed; (1) CH$_2$CO$^+$ + C$_7$H$_{11}^+$ + CH$_3$, (2) CH$_3^+$ + C$_7$H$_{11}^+$ + CH$_2$CO, and (3) C$_2$H$_5^+$ + C$_6$H$_9^+$ + CH$_2$CO. The dominating nature of sequential decay with deferred charge separation is clearly evidenced in all three channels. The results are discussed based on the experimental angular distributions and momenta distributions, corroborated by geometry optimization of the ground, monocationic, and dicationic camphor molecule. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.08502v2-abstract-full').style.display = 'none'; document.getElementById('2406.08502v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2202.13704">arXiv:2202.13704</a> <span> [<a href="https://arxiv.org/pdf/2202.13704">pdf</a>, <a href="https://arxiv.org/format/2202.13704">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevX.13.011044">10.1103/PhysRevX.13.011044 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Time-resolved chiral X-Ray photoelectron spectroscopy with transiently enhanced atomic site-selectivity: a Free Electron Laser investigation of electronically excited fenchone enantiomers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Faccial%C3%A0%2C+D">D. Faccial脿</a>, <a href="/search/physics?searchtype=author&query=Devetta%2C+M">M. Devetta</a>, <a href="/search/physics?searchtype=author&query=Beauvarlet%2C+S">S. Beauvarlet</a>, <a href="/search/physics?searchtype=author&query=Besley%2C+N">N. Besley</a>, <a href="/search/physics?searchtype=author&query=Calegari%2C+F">F. Calegari</a>, <a href="/search/physics?searchtype=author&query=Callegari%2C+C">C. Callegari</a>, <a href="/search/physics?searchtype=author&query=Catone%2C+D">D. Catone</a>, <a href="/search/physics?searchtype=author&query=Cinquanta%2C+E">E. Cinquanta</a>, <a href="/search/physics?searchtype=author&query=Ciriolo%2C+A+G">A. G. Ciriolo</a>, <a href="/search/physics?searchtype=author&query=Colaizzi%2C+L">L. Colaizzi</a>, <a href="/search/physics?searchtype=author&query=Coreno%2C+M">M. Coreno</a>, <a href="/search/physics?searchtype=author&query=Crippa%2C+G">G. Crippa</a>, <a href="/search/physics?searchtype=author&query=De+Ninno%2C+G">G. De Ninno</a>, <a href="/search/physics?searchtype=author&query=Di+Fraia%2C+M">M. Di Fraia</a>, <a href="/search/physics?searchtype=author&query=Galli%2C+M">M. Galli</a>, <a href="/search/physics?searchtype=author&query=Garcia%2C+G+A">G. A. Garcia</a>, <a href="/search/physics?searchtype=author&query=Mairesse%2C+Y">Y. Mairesse</a>, <a href="/search/physics?searchtype=author&query=Negro%2C+M">M. Negro</a>, <a href="/search/physics?searchtype=author&query=Plekan%2C+O">O. Plekan</a>, <a href="/search/physics?searchtype=author&query=Geetha%2C+P+P">P. Prasannan Geetha</a>, <a href="/search/physics?searchtype=author&query=Prince%2C+K+C">K. C. Prince</a>, <a href="/search/physics?searchtype=author&query=Pusala%2C+A">A. Pusala</a>, <a href="/search/physics?searchtype=author&query=Stagira%2C+S">S. Stagira</a>, <a href="/search/physics?searchtype=author&query=Turchini%2C+S">S. Turchini</a>, <a href="/search/physics?searchtype=author&query=Ueda%2C+K">K. Ueda</a> , et al. (6 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2202.13704v1-abstract-short" style="display: inline;"> Chiral molecules are widespread in nature, playing a fundamental role in bio-chemical processes and in the origin of life itself. The observation of dynamics in chiral molecules is crucial for the understanding and control of the chiral activity of photo-excited states. One of the most promising techniques for the study of photo-excited chiral systems is time-resolved photoelectron circular dichro… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.13704v1-abstract-full').style.display = 'inline'; document.getElementById('2202.13704v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2202.13704v1-abstract-full" style="display: none;"> Chiral molecules are widespread in nature, playing a fundamental role in bio-chemical processes and in the origin of life itself. The observation of dynamics in chiral molecules is crucial for the understanding and control of the chiral activity of photo-excited states. One of the most promising techniques for the study of photo-excited chiral systems is time-resolved photoelectron circular dichroism (TR-PECD), which offers an intense and sensitive probe for vibronic and geometric molecular structure as well as electronic structures, and their evolution on a femtosecond timescale. However, the non-local character of the PECD effect, which is imprinted during the electron scattering off the molecule, makes the interpretation of TR-PECD experiments challenging. In this respect, core-photoionization is known to allow site- and chemical-sensitivity to photelectron spectroscopy. Here we demonstrate that TR-PECD utilising core-level photoemission enables probing the chiral electronic structure and its relaxation dynamics with atomic site sensitivity. Following UV pumped excitation to a 3s Rydberg state, fenchone enantiomers (C 10 H 16 O) were probed on a femtosecond scale using circularly polarized soft X-ray light pulses provided by the free-electron laser FERMI. C 1s binding energy shifts caused by the redistribution of valence electron density in this 3s-valence-Rydberg excitation allowed us to measure transient PECD chiral responses with an enhanced C-atom site-selectivity compared to that achievable in the ground state molecule. These results represent the first chemical-specific and site-specific, enantio-sensitive observations on the electronic structure of a photo-excited chiral molecule and pave the way towards chiral femtochemistry probed by core-level photoemission. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.13704v1-abstract-full').style.display = 'none'; document.getElementById('2202.13704v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 February, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2104.01166">arXiv:2104.01166</a> <span> [<a href="https://arxiv.org/pdf/2104.01166">pdf</a>, <a href="https://arxiv.org/format/2104.01166">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acsphotonics.9b01605">10.1021/acsphotonics.9b01605 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Thermometric Calibration of the Ultrafast Relaxation Dynamics in Plasmonic Au Nanoparticles </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ferrera%2C+M">Marzia Ferrera</a>, <a href="/search/physics?searchtype=author&query=Della+Valle%2C+G">Giuseppe Della Valle</a>, <a href="/search/physics?searchtype=author&query=Sygletou%2C+M">Maria Sygletou</a>, <a href="/search/physics?searchtype=author&query=Magnozzi%2C+M">Michele Magnozzi</a>, <a href="/search/physics?searchtype=author&query=Catone%2C+D">Daniele Catone</a>, <a href="/search/physics?searchtype=author&query=O%27Keeffe%2C+P">Patrick O'Keeffe</a>, <a href="/search/physics?searchtype=author&query=Paladini%2C+A">Alessandra Paladini</a>, <a href="/search/physics?searchtype=author&query=Toschi%2C+F">Francesco Toschi</a>, <a href="/search/physics?searchtype=author&query=Mattera%2C+L">Lorenzo Mattera</a>, <a href="/search/physics?searchtype=author&query=Canepa%2C+M">Maurizio Canepa</a>, <a href="/search/physics?searchtype=author&query=Bisio%2C+F">Francesco Bisio</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2104.01166v1-abstract-short" style="display: inline;"> The excitation of plasmonic nanoparticles by ultrashort laser pulses sets in motion a complex ultrafast relaxation process involving the gradual re-equilibration of the system's electron gas, lattice and environment. One of the major hurdles in studying these processes is the lack of direct measurements of the dynamic temperature evolution of the system subcomponents. We measured the dynamic optic… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.01166v1-abstract-full').style.display = 'inline'; document.getElementById('2104.01166v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2104.01166v1-abstract-full" style="display: none;"> The excitation of plasmonic nanoparticles by ultrashort laser pulses sets in motion a complex ultrafast relaxation process involving the gradual re-equilibration of the system's electron gas, lattice and environment. One of the major hurdles in studying these processes is the lack of direct measurements of the dynamic temperature evolution of the system subcomponents. We measured the dynamic optical response of ensembles of plasmonic Au nanoparticles following ultrashort-pulse excitation and we compared it with the corresponding static optical response as a function of the increasing temperature of the thermodynamic bath. Evaluating the two sets of data, the optical fingerprints of equilibrium or off-equilibrium responses could be clearly identified, allowing us to extract a dynamic thermometric calibration scale of the relaxation process, yielding the experimental ultrafast temperature evolution of the plasmonic particles as a function of time. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.01166v1-abstract-full').style.display = 'none'; document.getElementById('2104.01166v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> ACS Photonics 7, 4, 959-966 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2103.01554">arXiv:2103.01554</a> <span> [<a href="https://arxiv.org/pdf/2103.01554">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1002/adom.202001778">10.1002/adom.202001778 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Sharp spectral variations of the ultrafast transient light extinction by bimetallic nanoparticles in the near-UV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Otomalo%2C+T">Tadele Otomalo</a>, <a href="/search/physics?searchtype=author&query=Di+Mario%2C+L">Lorenzo Di Mario</a>, <a href="/search/physics?searchtype=author&query=Hamon%2C+C">Cyrille Hamon</a>, <a href="/search/physics?searchtype=author&query=Constantin%2C+D">Doru Constantin</a>, <a href="/search/physics?searchtype=author&query=Do%2C+K">Khanh-Van Do</a>, <a href="/search/physics?searchtype=author&query=O%27Keeffe%2C+P">Patrick O'Keeffe</a>, <a href="/search/physics?searchtype=author&query=Catone%2C+D">Daniele Catone</a>, <a href="/search/physics?searchtype=author&query=Paladini%2C+A">Alessandra Paladini</a>, <a href="/search/physics?searchtype=author&query=Palpant%2C+B">Bruno Palpant</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2103.01554v1-abstract-short" style="display: inline;"> Noble metal nanoparticles exhibit localized plasmon resonance modes that span the visible and near-infrared spectral ranges and have many applications. Modifying the size, shape, and composition of the nanoparticles changes the number of modes and their properties. The characteristics of these modes are transiently affected when illuminating the nano-objects with ultrashort laser pulses. Here, we… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.01554v1-abstract-full').style.display = 'inline'; document.getElementById('2103.01554v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2103.01554v1-abstract-full" style="display: none;"> Noble metal nanoparticles exhibit localized plasmon resonance modes that span the visible and near-infrared spectral ranges and have many applications. Modifying the size, shape, and composition of the nanoparticles changes the number of modes and their properties. The characteristics of these modes are transiently affected when illuminating the nano-objects with ultrashort laser pulses. Here, we synthesize core-shell gold-silver nanocuboids and measure their spectral signature in the stationary and ultrafast transient regimes. Their dipolar transverse mode vanishes with increasing Ag-shell thickness, while higher-order modes grow in the near-ultraviolet range where no plasmon resonance can be generated with single noble metal nanoparticles. These higher-energy modes are associated with sharp spectral variations of the ultrafast transient light extinction by the bimetallic nanocuboids. By carrying out a theoretical investigation, we break down the different contributions to this response and <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.01554v1-abstract-full').style.display = 'none'; document.getElementById('2103.01554v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Advanced Optical Materials, Wiley, 2021, pp.2001778 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2008.09009">arXiv:2008.09009</a> <span> [<a href="https://arxiv.org/pdf/2008.09009">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.5.035409">10.1103/PhysRevMaterials.5.035409 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Photoluminescence of MAPbI$_3$: a semiconductor science and technology point of view </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Campanari%2C+V">Valerio Campanari</a>, <a href="/search/physics?searchtype=author&query=Agresti%2C+A">Antonio Agresti</a>, <a href="/search/physics?searchtype=author&query=Pescetelli%2C+S">Sara Pescetelli</a>, <a href="/search/physics?searchtype=author&query=Sivan%2C+A+K">Aswathi K. Sivan</a>, <a href="/search/physics?searchtype=author&query=Catone%2C+D">Daniele Catone</a>, <a href="/search/physics?searchtype=author&query=Keeffe%2C+P+O">Patrick O Keeffe</a>, <a href="/search/physics?searchtype=author&query=Turchini%2C+S">Stefano Turchini</a>, <a href="/search/physics?searchtype=author&query=Di+Carlo%2C+A">Aldo Di Carlo</a>, <a href="/search/physics?searchtype=author&query=Martelli%2C+F">Faustino Martelli</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2008.09009v1-abstract-short" style="display: inline;"> In this work, we perform steady-state continuous wave (cw) photoluminescence (PL) measurements on a MAPbI$_3$ thin film in the temperature range of 10-160 K, using excitation densities spanning over almost seven orders of magnitude, in particular investigating very low densities, rarely used in the published literature. The temperature range used in this study is below or at the edge of the orthor… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2008.09009v1-abstract-full').style.display = 'inline'; document.getElementById('2008.09009v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2008.09009v1-abstract-full" style="display: none;"> In this work, we perform steady-state continuous wave (cw) photoluminescence (PL) measurements on a MAPbI$_3$ thin film in the temperature range of 10-160 K, using excitation densities spanning over almost seven orders of magnitude, in particular investigating very low densities, rarely used in the published literature. The temperature range used in this study is below or at the edge of the orthorhombic-tetragonal phase transition in MAPbI$_3$. In particular, we show that even in high quality MAPbI$_3$, capable of providing high photovoltaic efficiency, the defect density is high enough to give rise to an energy level band. Furthermore, we show that the intensity ratio between the two PL components related to the two crystalline phases, is a function of temperature and excitation. At high excitation intensities, we show that amplified spontaneous emission is attainable even in cw conditions. Time-resolved PL is also performed to justify some assignments of the PL features. Finally, our systematic approach, typical for the characterization of semiconductors, suggests that it should also be applied to hybrid halide perovskites and that, under suitable conditions, the PL characteristics of MAPbI$_3$ can be reconciled with those of conventional inorganic semiconductors. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2008.09009v1-abstract-full').style.display = 'none'; document.getElementById('2008.09009v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 August, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Materials 5, 035409 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2008.04135">arXiv:2008.04135</a> <span> [<a href="https://arxiv.org/pdf/2008.04135">pdf</a>, <a href="https://arxiv.org/format/2008.04135">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1361-6528/abb907">10.1088/1361-6528/abb907 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Ultrafast optical spectroscopy of semiconducting and plasmonic nanostructures and their hybrids </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Catone%2C+D">Daniele Catone</a>, <a href="/search/physics?searchtype=author&query=Di+Mario%2C+L">Lorenzo Di Mario</a>, <a href="/search/physics?searchtype=author&query=Martelli%2C+F">Faustino Martelli</a>, <a href="/search/physics?searchtype=author&query=O%27Keeffe%2C+P">Patrick O'Keeffe</a>, <a href="/search/physics?searchtype=author&query=Paladini%2C+A">Alessandra Paladini</a>, <a href="/search/physics?searchtype=author&query=Cresi%2C+J+S+P">Jacopo Stefano Pelli Cresi</a>, <a href="/search/physics?searchtype=author&query=Sivan%2C+A+K">Aswathi K. Sivan</a>, <a href="/search/physics?searchtype=author&query=Tian%2C+L">Lin Tian</a>, <a href="/search/physics?searchtype=author&query=Toschi%2C+F">Francesco Toschi</a>, <a href="/search/physics?searchtype=author&query=Turchini%2C+S">Stefano Turchini</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2008.04135v2-abstract-short" style="display: inline;"> The knowledge of the carrier dynamics in nanostructures is of fundamental importance for the development of (opto)electronic devices. This is true for semiconducting nanostructures as well as for plasmonic nanoparticles (NPs). Indeed, improvement of photocatalytic efficiencies by combining semiconductor and plasmonic nanostructures is one of the reasons why their ultrafast dynamics are intensively… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2008.04135v2-abstract-full').style.display = 'inline'; document.getElementById('2008.04135v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2008.04135v2-abstract-full" style="display: none;"> The knowledge of the carrier dynamics in nanostructures is of fundamental importance for the development of (opto)electronic devices. This is true for semiconducting nanostructures as well as for plasmonic nanoparticles (NPs). Indeed, improvement of photocatalytic efficiencies by combining semiconductor and plasmonic nanostructures is one of the reasons why their ultrafast dynamics are intensively studied. In this work, we will review our activity on ultrafast spectroscopy in nanostructures carried out in the recently established EuroFEL Support Laboratory. We have investigated the dynamical plasmonic responses of metal NPs both in solution and in 2D and 3D arrays on surfaces, with particular attention being paid to the effects of the nanoparticle shape and to the conversion of absorbed light into heat on a nano-localized scale. We will summarize the results obtained on the carrier dynamics in nanostructured perovskites with emphasis on the hot-carrier dynamics and in semiconductor nanosystems such as ZnSe and Si nanowires, with particular attention to the band-gap bleaching dynamics. Subsequently, the study of semiconductor-metal NP hybrids, such as CeO$_2$-Ag NPs, ZnSe-Ag NPs and ZnSe-Au NPs, allows the discussion of interaction mechanisms such as charge carrier transfer and F{枚}rster interaction. Finally, we assess an alternative method for the sensitization of wide band gap semiconductors to visible light by discussing the relationship between the carrier dynamics of TiO$_2$ NPs and V-doped TiO$_2$ NPs and their catalytic properties. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2008.04135v2-abstract-full').style.display = 'none'; document.getElementById('2008.04135v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 August, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">28 pages, 11 figures, review type article</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2004.04639">arXiv:2004.04639</a> <span> [<a href="https://arxiv.org/pdf/2004.04639">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1063/1.5024408">10.1063/1.5024408 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Double photoionization of propylene oxide: a coincidence study of the ejection of a pair of valence-shell electrons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Falcinelli%2C+S">Stefano Falcinelli</a>, <a href="/search/physics?searchtype=author&query=Vecchiocattivi%2C+F">Franco Vecchiocattivi</a>, <a href="/search/physics?searchtype=author&query=Alagia%2C+M">Michele Alagia</a>, <a href="/search/physics?searchtype=author&query=Schio%2C+L">Luca Schio</a>, <a href="/search/physics?searchtype=author&query=Richter%2C+R">Robert Richter</a>, <a href="/search/physics?searchtype=author&query=Stranges%2C+S">Stefano Stranges</a>, <a href="/search/physics?searchtype=author&query=Catone%2C+D">Daniele Catone</a>, <a href="/search/physics?searchtype=author&query=Arruda%2C+M+S">Manuela S. Arruda</a>, <a href="/search/physics?searchtype=author&query=Mendes%2C+L+A+V">Luiz A. V. Mendes</a>, <a href="/search/physics?searchtype=author&query=Palazzetti%2C+F">Federico Palazzetti</a>, <a href="/search/physics?searchtype=author&query=Aquilanti%2C+V">Vincenzo Aquilanti</a>, <a href="/search/physics?searchtype=author&query=Pirani%2C+F">Fernando Pirani</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2004.04639v1-abstract-short" style="display: inline;"> Propylene oxide, a favorite target of experimental and theoretical studies of circular dichroism, was recently discovered in interstellar space, further amplifying the attention to its role in the current debate on protobiological homochirality. In the present work, a photoelectron-photoion-photoion coincidence technique, using an ion-imaging detector and tunable synchrotron radiation in the 18.0-… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.04639v1-abstract-full').style.display = 'inline'; document.getElementById('2004.04639v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2004.04639v1-abstract-full" style="display: none;"> Propylene oxide, a favorite target of experimental and theoretical studies of circular dichroism, was recently discovered in interstellar space, further amplifying the attention to its role in the current debate on protobiological homochirality. In the present work, a photoelectron-photoion-photoion coincidence technique, using an ion-imaging detector and tunable synchrotron radiation in the 18.0-37.0 eV energy range, permits: (i)-to observe six double-ionization fragmentation channels, their relative yields being accounted for about two-thirds by the couple (C2H4+, CH2O+), one-fifth by (C2H3+, CH3O+); (ii)-to measure thresholds for their openings as a function of photon energy; (iii)-to unravel a pronounced bimodality for a kinetic-energy-released distribution, fingerprint of competitive non-adiabatic mechanisms. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.04639v1-abstract-full').style.display = 'none'; document.getElementById('2004.04639v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">27 pages, 6 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1307.7967">arXiv:1307.7967</a> <span> [<a href="https://arxiv.org/pdf/1307.7967">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> IRIDE White Book, An Interdisciplinary Research Infrastructure based on Dual Electron linacs&lasers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Alesini%2C+D">D. Alesini</a>, <a href="/search/physics?searchtype=author&query=Alessandroni%2C+M">M. Alessandroni</a>, <a href="/search/physics?searchtype=author&query=Anania%2C+M+P">M. P. Anania</a>, <a href="/search/physics?searchtype=author&query=Andreas%2C+S">S. Andreas</a>, <a href="/search/physics?searchtype=author&query=Angelone%2C+M">M. Angelone</a>, <a href="/search/physics?searchtype=author&query=Arcovito%2C+A">A. Arcovito</a>, <a href="/search/physics?searchtype=author&query=Arnesano%2C+F">F. Arnesano</a>, <a href="/search/physics?searchtype=author&query=Artioli%2C+M">M. Artioli</a>, <a href="/search/physics?searchtype=author&query=Avaldi%2C+L">L. Avaldi</a>, <a href="/search/physics?searchtype=author&query=Babusci%2C+D">D. Babusci</a>, <a href="/search/physics?searchtype=author&query=Bacci%2C+A">A. Bacci</a>, <a href="/search/physics?searchtype=author&query=Balerna%2C+A">A. Balerna</a>, <a href="/search/physics?searchtype=author&query=Bartalucci%2C+S">S. Bartalucci</a>, <a href="/search/physics?searchtype=author&query=Bedogni%2C+R">R. Bedogni</a>, <a href="/search/physics?searchtype=author&query=Bellaveglia%2C+M">M. Bellaveglia</a>, <a href="/search/physics?searchtype=author&query=Bencivenga%2C+F">F. Bencivenga</a>, <a href="/search/physics?searchtype=author&query=Benfatto%2C+M">M. Benfatto</a>, <a href="/search/physics?searchtype=author&query=Biedron%2C+S">S. Biedron</a>, <a href="/search/physics?searchtype=author&query=Bocci%2C+V">V. Bocci</a>, <a href="/search/physics?searchtype=author&query=Bolognesi%2C+M">M. Bolognesi</a>, <a href="/search/physics?searchtype=author&query=Bolognesi%2C+P">P. Bolognesi</a>, <a href="/search/physics?searchtype=author&query=Boni%2C+R">R. Boni</a>, <a href="/search/physics?searchtype=author&query=Bonifacio%2C+R">R. Bonifacio</a>, <a href="/search/physics?searchtype=author&query=Boscolo%2C+M">M. Boscolo</a>, <a href="/search/physics?searchtype=author&query=Boscherini%2C+F">F. Boscherini</a> , et al. (189 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1307.7967v1-abstract-short" style="display: inline;"> This report describes the scientific aims and potentials as well as the preliminary technical design of IRIDE, an innovative tool for multi-disciplinary investigations in a wide field of scientific, technological and industrial applications. IRIDE will be a high intensity 'particle factory', based on a combination of a high duty cycle radio-frequency superconducting electron linac and of high ener… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.7967v1-abstract-full').style.display = 'inline'; document.getElementById('1307.7967v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1307.7967v1-abstract-full" style="display: none;"> This report describes the scientific aims and potentials as well as the preliminary technical design of IRIDE, an innovative tool for multi-disciplinary investigations in a wide field of scientific, technological and industrial applications. IRIDE will be a high intensity 'particle factory', based on a combination of a high duty cycle radio-frequency superconducting electron linac and of high energy lasers. Conceived to provide unique research possibilities for particle physics, for condensed matter physics, chemistry and material science, for structural biology and industrial applications, IRIDE will open completely new research possibilities and advance our knowledge in many branches of science and technology. IRIDE will contribute to open new avenues of discoveries and to address most important riddles: What does matter consist of? What is the structure of proteins that have a fundamental role in life processes? What can we learn from protein structure to improve the treatment of diseases and to design more efficient drugs? But also how does an electronic chip behave under the effect of radiations? How can the heat flow in a large heat exchanger be optimized? The scientific potential of IRIDE is far reaching and justifies the construction of such a large facility in Italy in synergy with the national research institutes and companies and in the framework of the European and international research. It will impact also on R&D work for ILC, FEL, and will be complementarity to other large scale accelerator projects. IRIDE is also intended to be realized in subsequent stages of development depending on the assigned priorities. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.7967v1-abstract-full').style.display = 'none'; document.getElementById('1307.7967v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 July, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">270 pages</span> </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" 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