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Quantum-mechanical effects in photoluminescence from thin crystalline gold films

Light(Science & Applications) 2024年第4期13卷 783-794页

作者： Alan R.Bowman Alvaro Rodríguez echarri Fatemeh Kiani Fadil Iyikanat ted V.Tsoulos Joel D.Cox Ravishankar Sundararaman F.Javier García de Abajo Giulia Tagliabue Laboratory of Nanoscience for energy Technologies(LNeT) STIÉcole Polytechnique Fédérale de Lausanne(EPFL)LausanneSwitzerland ICFO–Institut de Ciencies Fotoniques The Barcelona Institute of Science and TechnologyCastelldefels(Barcelona)Spain. MBI–Max-Born-Institut BerlinGermany. POLIMA–Center for Polariton-driven Light–Matter Interactions University of Southern DenmarkOdense MDenmark. Danish Institute for Advanced Study University of Southern DenmarkOdense MDenmark. Department of Materials Science&engineering Rensselaer Polytechnic InstituteTroyNYUSA. Department of Physics Applied Physicsand AstronomyRensselaer Polytechnic InstituteTroyNYUSA. ICReA–Institucio Catalana de Recerca i estudis Avancats BarcelonaSpain

Luminescence constitutes a unique source of insight into hot carrier processes in metals,including those in plasmonic nanostructures used for sensing and energy ***,being weak in nature,metal luminescence remains poorly understood,its microscopic origin strongly debated,and its potential for unraveling nanoscale carrier dynamics largely ***,we reveal quantum-mechanical effects in the luminescence emanating from thin monocrystalline gold ***,we present experimental evidence,supported by first-principles simulations,to demonstrate its photoluminescence origin(i.e.,radiative emission from electron/hole recombination)when exciting in the interband *** model allows us to identify changes to the measured gold luminescence due to quantum-mechanical effects as the gold film thickness is ***,such effects are observable in the luminescence signal from flakes up to 40 nm in thickness,associated with the out-of-plane discreteness of the electronic band structure near the Fermi *** qualitatively reproduce the observations with first-principles modeling,thus establishing a unified description of luminescence in gold monocrystalline flakes and enabling its widespread application as a probe of carrier dynamics and light-matter interactions in this *** study paves the way for future explorations of hot carriers and charge-transfer dynamics in a multitude of material systems.

关键词： luminescence quantum crystalline

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Ca-based materials derived from calcined cigarette butts for CO_(2)capture and thermochemical energy storage

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Journal of environmental Sciences 2024年第6期140卷 230-241页

作者： Nabil Amghar Virginia Moreno Pedro e.Sánchez-Jiménez Antonio Perejón Luis A.Pérez-Maqueda Instituto de Ciencia de Materiales de Sevilla C.S.I.C.-Universidad de SevillaC.Américo Vespucio4941092 SevillaSpain Instituto de Tecnología de Materiales(ITM) Universitat Politècnica de València(UPV)Plaza Ferrándiz y Carbonell 1AlcoyAlicante 03801Spain Departamento de Química Inorgánica Facultad de QuímicaUniversidad de Sevilla41012 SevillaSpain

Cigarette butts(CBs)are one of the most common types of litter in the *** to the toxic substances they contain,the waste generated poses a harmful risk to the environment,and therefore there is an urgent need for alternative solutions to landfill ***,this work presents a possible revalorization of this waste material,which implies interesting environmental *** were used as sacrificial templates for the preparation of CaO-based materials by impregnation with calcium and magnesium nitrates followed by flaming *** materials presented enhanced porosity for their use in the Calcium Looping process applied either to thermochemical energy storage or CO_(2)capture *** influence of the concentration of Ca and Mg in the impregnating solutions on the multicycle reactivity of the samples was *** improved multicycle performance was obtained in terms of conversion for both applications.

关键词： Cigarette butts Calcium-Looping CO_(2)Capture Thermochemical energy storage

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Linking the effect of localised pitting corrosion with mechanical integrity of a rare earth magnesium alloy for implant use

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Bioactive Materials 2023年第3期21卷 32-43页

作者： Kerstin van Gaalen Conall Quinn Felix Benn Peter e.McHugh Alexander Kopp ted J.Vaughan Biomechanics Research Centre(BioMeC) Biomedical EngineeringSchool of EngineeringNational University of Ireland GalwayGalwayIreland Meotec GmbH AachenGermany School of Mechanical and Aerospace engineering Queen’s University BelfastBelfastUnited Kingdom

This study presents a computational framework that investigates the effect of localised surface-based corrosion on the mechanical performance of a magnesium-based alloy.A finite element-based phenomenological corrosion model was used to generate a wide range of corrosion profiles,with subsequent uniaxial tensile test simulations to predict the mechanical response to *** python-based detection framework PitScan provides detailed quantification of the spatial phenomenological features of corrosion,including a full geometric tracking of corroding *** this approach,this study is the first to quantitatively demonstrate that a surface-based non-uniform corrosion model can capture both the geometrical and mechanical features of a magne-sium alloy undergoing corrosion by comparing to experimental *** this verified corrosion modelling approach,a wide range of corrosion scenarios was evaluated and enabled quantitative relationships to be established between the mechanical integrity and key phenomenological corrosion *** particular,we demonstrated that the minimal cross-sectional area parameter was the strongest predictor of the remaining mechanical strength(R2=0.98),with this relationship being independent of the severity or spatial features of localised surface ***,our analysis demonstrated that parameters described in ASTM G46-94 showed weaker correlations to the mechanical integrity of corroding specimens,compared to parameters determined by *** study establishes new mechanistic insight into the performance of the magnesium-based materials undergoing corrosion.

关键词： Magnesium Localised corrosion Corrosion modelling Phenomenology FeM

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Automated ex-situ detection of pitting corrosion and its effect on the mechanical integrity of rare earth magnesium alloy-We43

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Bioactive Materials 2022年第2期7卷 545-558页

作者： Kerstin van Gaalen Felix Gremse Felix Benn Peter e.McHugh Alexander Kopp ted J.Vaughan Biomechanics Research Centre(BioMeC) Biomedical EngineeringSchool of EngineeringCollege of Science and EngineeringNational University of Ireland GalwayGalwayIreland Meotec GmbH AachenGermany Institute for experimental Molecular Imaging RWTH Aachen UniversityAachenGermany School of Mechanical and Aerospace engineering Queen’s University BelfastBelfastUnited Kingdom

This study develops a three-dimensional automated detection framework(PitScan)that systematically evaluates the severity and phenomenology of pitting *** framework uses a python-based algorithm to analyse microcomputer-tomography scans(μCT)of cylindrical specimens undergoing *** approach systematically identifies several surface-based corrosion features,enabling full spatial characterisation of pitting parameters,including pit density,pit size,pit depth as well as pitting factor according to ASTM ***,it is used to evaluate pitting formation in tensile specimens of a Rare earth Magnesium alloy undergoing corrosion,and relationships between key pitting parameters and mechanical performance are *** demonstrated that several of the parameters described in ASTM G46-94,including pit number,pit density and pitting factor,showed little correlation to mechanical ***,this study did identify that other parameters showed strong correlations with the ultimate tensile strength and these tended to be directly linked to the reduction of the cross-sectional area of the ***,our results indicate,that parameters directly linked to the loss of the cross-sectional area(*** material width),are parameters that are most suited to provide an indication of a specimen’s mechanical *** automated detection framework developed in this study has the potential to provide a basis to standardise measurements of pitting corrosion across a range of metals and future prediction of mechanical strength over degradation time.

关键词： Magnesium Corrosion Degradation Micro-computer-tomography Pit detection Automatization Mechanical integrity

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Predicting localised corrosion and mechanical performance of a PeO surface modified rare earth magnesium alloy for implant use through in-silico modelling

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Bioactive Materials 2023年第8期26卷 437-451页

作者： Kerstin van Gaalen Conall Quinn Marek Weiler Felix Gremse Felix Benn Peter e.McHugh ted J.Vaughan Alexander Kopp Biomechanics Research Centre(BioMeC) Biomedical EngineeringSchool of EngineeringUniversity of GalwayGalwayIreland Meotec GmbH AachenGermany Institute for experimental Molecular Imaging RWTH Aachen UniversityAachenGermany Gremse-IT GmbH AachenGermany School of Mechanical and Aerospace engineering Queen’s University BelfastBelfastUnited Kingdom

In this study,the influence of a plasma electrolytic oxidation(PeO)surface treatment on a medical-grade We43-based magnesium alloy is examined through an experimental and computational framework that considers the effects of localised corrosion features and mechanical properties throughout the corrosion ***,a comprehensive in-vitro immersion study was performed on We43-based tensile specimens with and without PeO surface modification,which included fully automated spatial reconstruction of the phenomenological features of corrosion through micro-CT scanning,followed by uniaxial tensile *** the experimental data of both unmodified and PeO-modified groups were used to calibrate parameters of a finite element-based surface corrosion ***-vitro,it was found that the We43-PeO modified group had a significantly lower corrosion rate and maintained significantly higher mechanical properties than the *** corrosion rates were~50%lower in the We43-PeO modified specimens,the local geometric features of corroding surfaces remained similar to the unmodified We43 group,however evolving after almost the double amount of *** were also able to quantitatively demonstrate that the PeO surface treatment on magnesium continued to protect samples from corrosion throughout the entire period tested,and not just in the early stages of *** the results from the testing framework,the model parameters of the surface-based corrosion model were identified for both *** enabled,for the first time,in-silico prediction of the physical features of corrosion and the mechanical performance of both unmodified and PeO modified magnesium *** simulation framework can enable future in-silico design and optimisation of bioabsorbable magnesium devices for load-bearing medical applications.

关键词： Plasma electrolytic oxidation We43MeO Degradation model Corrosion phenomenology Mechanical integrity

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胃复安肠外给药治疗急性偏头痛:多项随机对照试验的汇总分析

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英国医学杂志中文版 2005年第2期8卷 130-130页

作者： lan Colman Michael D Brown Grant D Innes eric Grafstein ted e roberts Brian H Rowe 朱丽琳

目的：通过分析多项对照试验结果，评价胃复安肠外给药对于成人急性偏头痛的疗效和患者耐受性。资料来源：Cochrane对照试验中心注册材料，Medline，embase，LILACS，CINAHL，会议记录，临床实践指南及其他资源。

关键词：急性偏头痛随机对照试验胃复安汇总分析肠外药治疗 Cochrane Medline 临床实践指南试验结果资料来源耐受性

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Survival of rat sciatic nerve segments preserved in storage solutions ex vivo assessed by novel electrophysiological and morphological criteria

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Neural Regeneration Research 2023年第9期18卷 2082-2088页

作者： Liwen Zhou Monzer Alatrach ted Zhao Paul Oliphint George D.Bittner Department of Neuroscience University of Texas at AustinAustinTXUSA

Most organ or tissue allografts with viable cells are sto red in solutions ex vivo for hours to seve ral *** allografts then require rapid host revascula rization upon transplantation to maintain donor-cell functions(e.g.,cardiac muscle contra ctions,hepatic secretions).In contrast,peripheral nerve allografts stored ex vivo do not require revascularization to act as scaffolds to guide outgrowth by host axons at 1-2 mm/d,likely aided by viable donor Schwann *** current storage solutions and protocols,axons in all these donor orga n/tissue/nerve transplants are expected to rapidly become non-viable due to Wallerian degeneration within ***,ex vivo storage solutions have not been assessed for preserving normal axonal functions,i.e.,conducting action potentials or maintaining myelin *** hypothesized that most or all organ storage solutions would maintain axonal *** examined several common organ/tissue storage solutions(University of Wisconsin Cold Storage Solution,Normosol-R,Normal Saline,and La ctated Ringe rs) for axonal viability in rat sciatic nerves ex vivo as assessed by maintaining:(1) conduction of artificially-induced compound action potentials;and(2) axonal and myelin morphology in a novel assay *** ten diffe rent storage solution conditions for peripheral nerves with viable axons(PNVAs) diffe red in their solution composition,osmolarity(250-318 mOsm),temperature(4℃ vs.25℃),and presence of *** action potentials and axonal morphology in PNVAs were best maintained for up to 9 days ex vivo in calcium-free hypotonic diluted(250 mOsm) Normosol-R(dNR) at 4℃.Surprisingly,compound action potentials were maintained for only 1-2 days in UW and NS at 4℃,a much shorter duration than PNVAs maintained in 4℃ dNR(9 days) or even in 25℃ dNR(5 days).Viable axons in peripheral nerve allografts are critical for successful polyethylene glycol(PeG)-fusion of viable proximal and distal ends of host axons with viable donor a

关键词： axonal morphometrics axonal viability calcium osmolarity peripheral nerve grafts peripheral nerve injury temperature tissue storage solutions tonicity Wallerian degeneration

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Revisiting the trail pheromone components of the red imported fire ant, Solenopsis invicta Buren

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Insect Science 2023年第1期30卷 161-172页

作者： Tian Xu Nuo Zhang Meng Xu Gaetan Glauser ted C.J.Turlings Li Chen State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBeijingChina School of Life Sciences Institute of Life Science and Green DevelopmentHebei UniversityBaodingHebei ProvinceChina College of Forestry Nanjing Forestry UniversityNanjingChina School of Agriculture Yangtze UniversityJingzhouChina Neuchatel Platform of Analytical Chemistry University of NeuchatelNeuchatelSwitzerland Laboratory of Fundamental and Applied Research in Chemical ecology University of NeuchatelSwitzerland

Ants use species-specific trail pheromones to coordinate their sophisticated foraging *** the past decades,many trail pheromone components with various structures have been identified in ants,including the red imported fire ant,Solenopsis invicta,a notorious invasive species *** compounds,Z,e-(ZeF)and e,e-α-farnesene(eeF),Z,e-(ZeHF)and e,e-α-homofarnesene(eeHF),have been reported as components of *** trail ***,another study reported an analog ofα-farnesene,Z,Z,Z-allofarnesene,as a key trail pheromone *** contrasting results caused some uncertainty about the trail pheromone composition in *** this study,we synthesized ZeF and eeF,ZeHF and eeHF,and reanalyzed the chemicals in the Dufour gland extract and in the trail pheromone fraction of *** worker body *** reported isomers of farnesene and homofarnesene were detected and showed trail-following activity,with ZeF as the major compound,while no allofarnesene was found,neither in the Dufour gland extract nor in the whole-body *** results confirm ZeF and eeF,ZeHF and eeHF as trail pheromone components of ***.

关键词： allofarnesene Dufour gland α-farnesene α-homofarnesene synthesis trail-following

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Monitoring of brown stink bug (Hemiptera: Pentatomidae) population dynamics in corn to predict its abundanee using weather data

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Insect Science 2019年第3期26卷 536-544页

作者： Xinzhi Ni ted e. Cottrell G. David Buntin Xianchun Li Wei Wang Hong Zhuang USDA-ARS Crop Genetics and Breeding Research Unit Tifton Georgia USA USDA-ARS Southeastern Fruit and Tree Nut Research Laboratory Byron Georgia USA Department of entomology University of Georgia Griffin Georgia USA Department of entomology University of Arizona Tucson Arizona USA College of engineering China Agricultural University Beijing China USDA-ARS Quality and Safety Assessment Research Unit Athens Georgia USA

The brown stink bug (BSB), euschistus servus (Say)(Hemiptera: Pentatomidae), is a serious economic pest of corn production in the southeastern United States. The BSB population dynamics was mon itored for 17 weeks from tasseling to preharvest of corn plants (i.e., late May to mid-September) using pheromone traps in three corn fields from 2005 to 2009. The trap data showed two peaks in early June and mid-August, respectively. The relationship between trap catch and pregrowing season weather data was examined using correlation and stepwise multiple factor regression analyses. Weather indices used for the analyses were accumulated growing degree day (AGDD), number of days with minimum temperature below 0℃(Subz), accumulated daily maximum (AMaxT) and minimum temperatures (AMinT) and rainfall (ARain). The weather indices were calculated with lower (10℃) and upper (35℃) as biological thresholds. The parameters used in regression analysis were seasonal abundance (or overall mean of BSB adult catch)(BSBm), number of BSB adults caught at a peak (PeakBSB), and peak week (Peakwk). The BSBm was negatively related to high temperature (AmaxT or AGDD) consistently, whereas IstPeakBSB was positively correlated to both ARain and Subz, irrespective of weather data durations (the first 4, 4.5, and 5 months). In contrast, the 7-month weather data (AGDD7) were negatively correlated to the BSBm only, but not correlated to the second PeakBSB. The 5-year monitoring study demonstrated that weather data can be used to predict the BSB abundance at its first peak in tasseling corn fields in the southeastern U.S. states.

关键词： euschistus servus first trap catch peak pheromone trap catch population dynamics stepwise regression modeling weekly mean

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Measuring efficiency of crop cleaners by image analysis

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International Journal of Agricultural and Biological engineering 2011年第4期4卷 34-41页

作者： Junming Wang Frank e.eaton ted W.Sammis MeKonnen Gebremichael Department of Agricultural and environmental Sciences Tennessee State UniversityUSA eaton Chile Harvester Inc. New MexicoUSA Department of Plant and environmental Sciences New Mexico State UniversityLas CrucesNew MexicoUSA Civil and environmental engineering Department University of ConnecticutStorrsCTUSA.

The purity of product from agricultural cleaners(such as chile,cotton,bean,wheat and other crop cleaners)is needed to be measured under various conditions in order to adjust and optimize the machine at the design and improvement *** traditional weight-based method of measuring purity is time consuming,and requires much *** this study,we used image analysis to measure percent crop cover for the product output to infer the *** cleaner was used as one example machine to compare between Photoshop©and Arcview©software for the analysis of fresh and dry harvest *** data collection process is more reproducible and less labor and time consuming than the traditional *** software packages provided accurate estimations of purity for both fresh and dry harvest ***©had better accuracy than Arcview©(mean error ratio of 0.016 vs.0.081 for fresh harvest;and 0.035 vs.0.114 for dry harvest).

关键词： cleaner measuring efficiency image analysis separation chile pepper purity trash

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