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Intrinsic and Extrinsic Exciton Recombination Pathways in AgInS_(2)Colloidal Nanocrystals

Energy Material Advances 2021年第1期2021卷 165-174页

作者： matteo l.zaffalon Valerio Pinchetti Andrea Camellini Sergey Vikulov Chiara Capitani Bing Bai Meng Xu Francesco Meinardi Jiatao Zhang liberato Manna Margherita Zavelani-Rossi Scott A.Crooker Sergio Brovelli Dipartimento di Scienza dei Materiali Universitàdegli studi di Milano-Bicoccavia Roberto Cozzi 5520125 MilanoItaly Dipartimento di Energia Politecnico di MilanoVia Ponzio 34/320133 MilanoItaly Istituto Italiano di Tecnologia Via Morego 3016163 GenovaItaly Glass to Power SpA Via Fortunato Zeni 838068 RoveretoItaly Beijing Key laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications School of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081China IFN-CNR Piazza Leonardo da Vinci 3220133 MilanoItaly National High Magnetic Field laboratory Los Alamos National LaboratoryLos AlamosNew Mexico 87545USA

Ternary I-III-VI2 nanocrystals(NCs),such as AgInS_(2) and CuInS_(2),are garnering interest as heavy-metal-free materials for photovoltaics,luminescent solar concentrators,lEDs,and *** origin of the emission and absorption properties in this class of NCs is still a subject of *** theoretical and experimental studies revealed that the characteristic Stokesshifted and long-lived luminescence of stoichiometric CuInS_(2) NCs arises from the detailed structure of the valence band featuring two sublevels with different *** same valence band substructure is predicted to occur in AgInS_(2) NCs,yet no experimental confirmation is available to ***,we use complementary spectroscopic,spectro-electrochemical,and magneto-optical investigations as a function of temperature to investigate the band structure and the excitonic recombination mechanisms in stoichiometric AgInS_(2) *** transmission measurements reveal the signatures of two subbands with opposite parity,and photoluminescence studies at cryogenic temperatures evidence a dark state emission due to enhanced exchange interaction,consistent with the behavior of stoichiometric CuInS_(2) *** the temperature as well as applying reducing electrochemical potentials further suppress electron trapping,which represents the main nonradiative channel for exciton decay,leading to nearly 100%emission efficiency.

关键词： parity valence applying

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Modeling and measuring glucose diffusion and consumption by colorectal cancer spheroids in hanging drops using integrated biosensors

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Microsystems & Nanoengineering 2022年第1期8卷 193-210页

作者： Nassim Rousset Rubén lópez Sandoval Mario matteo Modena Andreas Hierlemann Patrick M.Misun ETH Zürich Department of Biosystems Science and EngineeringBio Engineering LaboratoryMattenstrasse 26CH-4058 BaselSwitzerland

As 3D in vitro tissue models become more pervasive,their built-in nutrient,metabolite,compound,and waste gradients increase biological relevance at the cost of analysis *** these gradients and the resulting metabolic heterogeneity requires invasive and time-consuming *** alternative is using electrochemical biosensors and measuring concentrations around the tissue model to obtain size-dependent metabolism *** our hanging-dropintegrated enzymatic glucose biosensors,we conducted current measurements within hanging-drop compartments hosting spheroids formed from the human colorectal carcinoma cell line *** developed a physics-based mathematical model of analyte consumption and transport,considering(1)diffusion and enzymatic conversion of glucose to form hydrogen peroxide(H_(2)O_(2))by the glucose-oxidase-based hydrogel functionalization of our biosensors at the microscale;(2)H_(2)O_(2)oxidation at the electrode surface,leading to amperometric H_(2)O_(2)readout;(3)glucose diffusion and glucose consumption by cancer cells in a spherical tissue model at the microscale;(4)glucose and H_(2)O_(2)transport in our hangingdrop compartments at the macroscale;and(5)solvent evaporation,leading to glucose and H_(2)O_(2)*** model relates the measured currents to the glucose concentrations generating the *** low limit of detection of our biosensors(0.4±0.1μM),combined with our current-fitting method,enabled us to reveal glucose dynamics within our *** measuring glucose dynamics in hanging-drop compartments populated by cancer spheroids of various sizes,we could infer glucose distributions within the spheroid,which will help translate in vitro 3D tissue model results to in vivo.

关键词： diffusion hanging simplicity

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Home,dirty home:effect of old nest material on nest-site selection and breeding performance in a cavity-nesting raptor

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Current Zoology 2018年第6期64卷 693-702页

作者： Stefano PODOFIllINI Jacopo G.CECERE matteo GRIGGIO Andrea CURCIO Enrico l DE CAPUA Egidio FUlCO Simone PIRREllO Nicola SAINO lorenzo SERRA matteo VISCEGlIA Diego RUBOlINI Dipartimento di Scienze e Politiche Ambientali Universita degli Studi di Milanovia Celoria 26MilanoI-20133Italy Istituto Superiore per la Protezione e la Ricerca Ambientale (ISPRA) Ozzano Emilia (BO)Italy Dipartimento di Biologia Universita degli Studi di PadovaItaly Provincia di Matera -Parco della Murgia Materana Italy Studio Naturalistico Milvus Pignola (PZ)Italy De Rerum Natura Montescaglioso (MT)Italy

The quality of a breeding site may have major fitness consequences.A fundamental step to understanding the process of nest-site selection is the identification of the information individuals use to choose high-quality nest *** secondary cavity-nesting bird species that do not add nest lining material,organic remains (faeces,pellets)accumulated inside nest cavities during previous breeding events may be a cue for high-quality nest-sites,as they contain information about past successful breeding and may improve thermal insulation of eggs during ***,cavities in which breeding was successful might also contain more nest-dwelling ectoparasites than unoccupied cavities, offering an incentive for prospective parents to avoid *** exposed breeding cavity-nesting lesser kestrels (Falco naumanni)to nestbox dyads consisting of a dirty (with a thick layer of organic substrate) and a clean nestbox (without organic material).Dirty nestboxes were strongly preferred,being occupied earlier and more frequently than clean *** success in dirty nestboxes was significantly higher than in clean ones,suggesting a positive effect of organic nest material on incubation efficiency, while nestbox dirtiness did not significantly affect clutch and brood *** from dirty nestboxes had significantly higher ectoparasite load than those from clean nestboxes soon after egg hatching,but this difference was not evident a few days *** substrate did not significantly affect nestling *** concluded that nest substrate is a key driver of nest-site choice in lesser kestrels,although the adaptive value of such a strong preference appears elusive and may be context-dependent.

关键词： Camus hemapterus ectoparasites nestbex nest substrate nest-site selection

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Perturbed initial orbit determination

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Astrodynamics 2024年第3期8卷 401-416页

作者： Alberto Fossà matteo losacco Roberto Armellin Institut Supérieur de l’Aéronautique et de l’Espace Toulouse31400France Te PūnahaĀtea-Space Institute The University of AucklandAuckland1010New Zealand

An algorithm for robust initial orbit determination (IOD) under perturbed orbital dynamics is presented. By leveraging map inversion techniques defined in the algebra of Taylor polynomials, this tool returns a highly accurate solution to the IOD problem and estimates a range centered on the aforementioned solution in which the true orbit should lie. To meet the specified accuracy requirements, automatic domain splitting is used to wrap the IOD routines and ensure that the local truncation error, introduced by a polynomial representation of the state estimate, remains below a predefined threshold. The algorithm is presented for three types of ground-based sensors, namely range radars, Doppler-only radars, and optical telescopes, by considering their different constraints in terms of available measurements and sensor noise. Finally, the improvement in performance with respect to a Keplerian-based IOD solution is demonstrated using large-scale numerical simulations over a subset of tracked objects in low Earth orbit.

关键词： initial orbit determination(IOD) range radar Doppler radar optical telescope differential algebra(DA)

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Delocalization of dark and bright excitons in flat-band materials and the optical properties of V_(2)O_(5)

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npj Computational Materials 2022年第1期8卷 882-890页

作者： Vitaly Gorelov lucia Reining Martin Feneberg Rüdiger Goldhahn AndréSchleife Walter R.l.lambrecht matteo Gatti lSI CNRSCEA/DRF/IRAMISÉcole PolytechniqueInstitut Polytechnique de ParisF-91120PalaiseauFrance European Theoretical Spectroscopy Facility https://www.etsf.eu/ Institute of Physics Otto von Guericke University MagdeburgUniversitätsplatz 239106MagdeburgGermany Department of Materials Science and Engineering University of Illinois at Urbana-ChampaignUrbanaIL61801USA Materials Research laboratory University of Illinois at Urbana-ChampaignUrbanaIL61801USA National Center for Supercomputing Applications University of Illinois at Urbana-ChampaignUrbanaIL61801USA Department of Physics Case Western Reserve UniversityClevelandOH44106-7079USA Synchrotron SOlEIl L’Orme des MerisiersSaint-Aubin BP 48F-91192Gif-sur-YvetteFrance

The simplest picture of excitons in materials with atomic-like localization of electrons is that of Frenkel excitons,where electrons and holes stay close together,which is associated with a large binding ***,using the example of the layered oxide V_(2)O_(5),we show how localized charge-transfer excitations combine to form excitons that also have a huge binding energy but,at the same time,a large electron-hole distance,and we explain this seemingly contradictory *** anisotropy of the exciton delocalization is determined by the local anisotropy of the structure,whereas the exciton extends orthogonally to the chains formed by the crystal ***,we show that the bright exciton goes together with a dark exciton of even larger binding energy and more pronounced *** findings are obtained by combining first principles many-body perturbation theory calculations,ellipsometry experiments,and tight binding modelling,leading to very good agreement and a consistent *** explanation is general and can be extended to other materials.

关键词： structure anisotropy finding

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Automated phenotyping of Caenorhabditis elegans embryos with a high-throughput-screening microfluidic platform

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Microsystems & Nanoengineering 2020年第1期6卷 1103-1116页

作者： Huseyin Baris Atakan Tunc Alkanat matteo Cornaglia Raphael Trouillon Martin A.M.Gijs laboratory of Microsystems Ecole Polytechnique Federale de Lausanne1015 LausanneSwitzerland Department of Electrical Engineering Eindhoven University of Technology5600MB EindhovenThe Netherlands

The nematode Caenorhabditis elegans has been extensively used as a model multicellular organism to study the influence of osmotic stress conditions and the toxicity of chemical compounds on developmental and motility-associated ***,the several-day culture of nematodes needed for such studies has caused researchers to explore *** particular,*** embryos,due to their shorter developmental time and immobile nature,could be exploited for this purpose,although usually their harvesting and handling is ***,we present a multiplexed,high-throughput and automated embryo phenotyping microfluidic approach to observe *** embryogenesis after the application of different chemical *** performing experiments with up to 800 embryos per chip and up to 12h of time-lapsed imaging per embryo,the individual phenotypic developmental data were collected and analyzed through machine learning and image processing *** proof-of-concept platform indicates developmental lag and the induction of mitochondrial stress in embryos exposed to high doses(200mM)of glucose and NaCl,while small doses of sucrose and glucose were shown to accelerate ***,our new technique has potential for use in large-scale developmental biology studies and opens new avenues for very rapid high-throughput and high-content screening using *** embryos.

关键词： doses fluid harvesting

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Enhanced magnetic modulation of light polarization exploiting hybridization with multipolar dark plasmons in magnetoplasmonic nanocavities

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light(Science & Applications) 2020年第1期9卷 1547-1560页

作者： Alberto lopez-Ortega Mario Zapata-Herrera Nicolo Maccaferri matteo Pancaldi Mikel Garcia Andrey Chuvilin Paolo Vavassori CIC nanoGUNE-BRTA Donostia-San SebastianDonostia 20018Spain Department of Physics and Materials Science University of LuxembourgL-1511 LuxembourgLuxembourg Department of Physics Stockholm University10691 StockholmSweden IKERBASQUE Basque Foundation for ScienceBilbao 48013Spain

Enhancing magneto-optical effects is crucial for reducing the size of key photonic devices based on the non-reciprocal propagation of light and to enable active ***,we disclose a currently unexplored approach that exploits hybridization with multipolar dark modes in specially designed magnetoplasmonic nanocavities to achieve a large enhancement of the magneto-optically induced modulation of light *** broken geometrical symmetry of the design enables coupling with free-space light and hybridization of the multipolar dark modes of a plasmonic ring nanoresonator with the dipolar localized plasmon resonance of the ferromagnetic disk placed inside the *** hybridization results in a low-radiant multipolar Fano resonance that drives a strongly enhanced magneto-optically induced localized *** large amplification of the magneto-optical response of the nanocavity is the result of the large magneto-optically induced change in light polarization produced by the strongly enhanced radiant magneto-optical dipole,which is achieved by avoiding the simultaneous enhancement of reemitted light with incident polarization by the multipolar Fano *** partial compensation of the magnetooptically induced polarization change caused by the large re-emission of light with the original polarization is a critical limitation of the magnetoplasmonic designs explored thus far and that is overcome by the approach proposed here.

关键词： polar light enable

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Connector theory for reusing model results to determine materials properties

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npj Computational Materials 2022年第1期8卷 923-930页

作者： Marco Vanzini Ayoub Aouina Martin Panholzer matteo Gatti lucia Reining lSI CNRSCEA/DRF/IRAMISÉcole PolytechniqueInstitut Polytechnique de ParisF-91120PalaiseauFrance Theory and Simulation of Materials(THEOS) École Polytechnique Fédérale de LausanneCH-1015LausanneSwitzerland European Theoretical Spectroscopy Facility(ETSF)https://www.etsf.eu Johannes Kepler University linz LinzAustria Uni Software Plus GmbH Linzer Strasse 64320PergAustria Synchrotron SOlEIl L’Orme des MerisiersSaint-AubinBP 48F-91192Gif-sur-YvetteFrance

The success of Density Functional Theory(DFT)is partly due to that of simple approximations,such as the local Density Approximation(lDA),which uses results of a model,the homogeneous electron gas,to simulate exchange-correlation effects in real *** turn this intuitive approximation into a general and in principle exact theory by introducing the concept of a connector:a prescription how to use results of a model system in order to simulate a given quantity in a real *** this framework,the lDA can be understood as one particular approximation for a connector that is designed to link the exchange-correlation potentials in the real material to that of the *** the in principle exact connector equations allows us to go beyond the lDA in a systematic ***,connector theory is not bound to DFT,and it suggests approximations also for other functionals and other *** explain why this very general approach is indeed a convenient starting point for *** illustrate our purposes with simple but pertinent examples.

关键词： materials theory exact

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Decline of Traditional landscape in a Protected Area of the Southwestern Alps:the Fate of Enclosed Pasture Patches in the land Mosaic Shift

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Journal of Mountain Science 2014年第2期11卷 544-554页

作者： matteo GARBARINO Emanuele SIBONA Emanuele lINGUA Renzo MOTTA Department of Agricultural Food and Environmental Sciences (D3A) Università Politecnica delle MarcheVia delle Brecce BiancheI-60131 AnconaItaly Department of Agriculture Forest and Food Sciences (DISAFA) University of Torino Via L. da Vinci 44 I-10095 Grugliasco TO Italy Department of land and Agro-Forestry Systems (TESAF) University of Padova Agripolis Viale dell'Università 16 I-35020 Legnaro PD Italy

【Title】【Author】【Addresses】1Traditional landscape elements such as pasture patches enclosed in a forest matrix are progressively disappearing throughout the European Alps. We assessed the land mosaic shift of a protected area located in the western Italian Alps. In particular, the dynamics of pasture patches were studied at both landscape and stand level. land-cover mapping through object-oriented analysis of historical aerial photographs was used to assess land-cover changes between 1954 and 2000. Spatial statistics were used to quantify landscape patterns, and field samplings within pasture patches were used to explore tree regeneration structure and composition. Our results showed a significant increase in the number of pasture patches caused by their fragmentation following forest expansion. The total surface area of pasture patches decreased by 43% and their core area decreased by 94%. The encroachment of trees on less accessible areas of the pasture patches caused a reduction of patch shape at landscape scale. The gap filling process started 40-50 years ago and began with an early invasion of light demanding species like sycamore maple （Acer pseudoplatanus l.） and common ash （Fraxinus excelsior l.）, followed by European beech （Fagus sylvatica l.） and secondarily silver fir （Abies alba Mill.）. Traditional land-use and population decline in the Pesio Valley led to a reduction in ecotone areas. A transition to a more homogeneous landscape is expected in the next decades. Given the cultural and productive nature of these mountain meadow-pasture communities, extensive livestock grazing systems could be used to manage their future conservation.

关键词： landscape structure Secondary succession Historical ecology Pesio Valley Traditional land-use

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Experimental Validation of light Cable-Driven Elbow-Assisting Device l-CADEl Design

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Journal of Bionic Engineering 2022年第2期19卷 416-428页

作者： Med Amine laribi Marco Ceccarelli Juan Sandoval matteo Bottin Giulio Rosati Department GMSC Pprime InstituteCNRS-University of Poitiers-ENSMAUPR 334686073 PoitiersFrance Department of Industrial Engineering University of Rome Tor Vergata00133 RomeItaly Department of Industrial Engineering University of Padova35122 PaduaItaly

This paper presents a new design of CADEl,a cable-driven elbow-assisting device,with light weighting and control *** new device design is appropriate to be more portable and user-oriented solution,presenting additional facilities with respect to the original *** of potential benefits of improved portability can be envisaged in the possibility of house and hospital usage keeping social distancing while allowing rehabilitation treatments even during a pandemic *** attention has been devoted to design main mechatronic components by developing specific kinematics *** design process includes an implementation of specific control hardware and *** kinematic model of the new design is formulated and features are evaluated through numerical simulations and experimental *** evaluation from original design highlights the proposed improvements mainly in terms of comfort,portability and user-oriented operation.

关键词： Rehabilitation robotics Medical devices Design Simulations Cable-driven parallel robot Control

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