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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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Intraductal biliary and pancreatic endoscopy: An expanding scope of possibility

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World Journal of Gastroenterology 2008年第20期14卷 3129-3136页

作者： joel R Judah Peter v Draganov Division of Gastroenterology Hepatology and Nutrition University of Florida Gainesville

Intraductal endoscopy describes the use of an endoscope to directly visualize the biliary and pancreatic ducts. For many years, technological challenges have made performing these procedures difficult. The "mother-baby" system and other various miniscopes have been developed, but routine use has been hampered due to complex setup, scope fragility and the time consuming, technically demanding nature of the procedure. Recently, the SpyGlass peroral cholangiopancreatoscopy system has shown early success at providing diagnostic information and therapeutic options. The clinical utility of intraductal endoscopy is broad. It allows better differentiation between benign and malignant processes by allowing direct visualization and targeted sampling of tissue. Therapeutic interventions, such as electrohydraulic lithotripsy (EHL), laser lithotripsy, photodynamic therapy, and argon plasma coagulation (APC), may also be performed as part of intraductal endoscopy. Intraductal endoscopy significantly increases the diagnostic and therapeutic yield of standard endoscopic retrograde cholangiography (ERCP), and as technology progresses, it is likely that its utilization will only increase. In this review of intraductal endoscopy, we describe in detail the various endoscopic platforms and their diagnostic and clinical applications.

关键词： Intraductal endoscopy Choledochoscopy Cholangioscopy Pancreatoscopy Biliary endoscopy Duodenoscope-assisted cholangiopancreatoscopy Miniscope Percutaneous choledochoscopy Laparoscopiccholedochoscopy Lithotripsy

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Endoscopic therapy of benign biliary strictures

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World Journal of Gastroenterology 2007年第26期13卷 3531-3539页

作者： joel R Judah Peter v Draganov University of Florida Division of GastroenterologyHepatology and NutritionGainesvilleFloridaUnited States

Benign biliary strictures are being increasingly treated with endoscopic techniques. The benign nature of the stricture should be first confirmed in order to ensure appropriate therapy. Surgery has been the traditional treatment, but there is increasing desire for minimally invasive endoscopic therapy. At present, endoscopy has become the first line approach for the therapy of post- liver transplant anastomotic strictures and distal （Bismuth ! and I） post-operative strictures. Strictures related to chronic pancreatitis have proven more difficult to treat, and endoscopic therapy is reserved for patients who are not surgical candidates. The preferred endoscopic approach is aggressive treatment with gradual dilation of the stricture and insertion of multiple plastic stents. The use of uncovered self expandable metal stents should be discouraged due to poor long-term results. Treatment with covered metal stents or bioabsorbable stents warrants further evaluation. This area of therapeutic endoscopy provides an ongoing opportunity for fresh research and innovation.

关键词： Biliary stricture Endoscopy Biliary stent Pancreatitis Liver transplant Anastomotic stricture

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Schistosoma mansoni proteins attenuate gastrointestinal motility disturbances during experimental colitis in mice

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World Journal of Gastroenterology 2010年第6期16卷 703-712页

作者： Nathalie E Ruyssers Benedicte Y De Winter Joris G De Man Natacha D Ruyssers Ann J van Gils Alex Loukas Mark S Pearson joel v.weinstock Paul A Pelckmans Tom G Moreels Laboratory of Experimental Medicine and Pediatrics Division of GastroenterologyUniversity of Antwerp Division of Infectious Diseases and Immunology Queensland Institute of Medical Research 4006 Brisbane Division of Gastroenterology-Hepatology Tufts New England Medical Center

AIM:To investigate the therapeutic effect of Schistosoma mansoni(***) soluble worm proteins on gastrointestinal motility disturbances during experimental colitis in mice. METHODS:Colitis was induced by intrarectal injection of trinitrobenzene sulphate(TNBS) and 6 h later,mice were treated ip with *** *** were performed 5 d after TNBS *** quantified using validated inflammation parameters. Gastric emptying and geometric center were measured to assess in vivo gastrointestinal *** activity of distal colonic segments was studied in vitro using a modified Trendelenburg *** profiles of T-lymphocytes isolated from the colon were determined by real time reverse transcriptase-polymerase chain reaction. RESULTS:Intracolonic injection of TNBS caused severe *** with *** proteins significantly ameliorated colonic inflammation after 5 *** did not affect gastric emptying but significantly decreased the geometric center and impaired colonic peristaltic activity 5 d after the induction of *** with *** proteins ameliorated these in vivo and in vitro motility *** addition,TNBS injection caused a downregulation of effector T cell cytokines after 5 d,whereas a *** protein effect was no longer observed at this time point. CONCLUSION:Treatment with *** proteins attenuated intestinal inflammation and ameliorated motility disturbances during murine experimental colitis.

关键词： Schistosoma mansoni Helminth proteins Colitis Peristalsis Crohn’s disease Gastrointestinal motility Trinitrobenzene sulphate

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Phase transitions in four-dimensional AdS black holes with a nonlinear electrodynamics source

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Communications in Theoretical Physics 2021年第12期73卷 119-128页

作者： Ramon Becar P A Gonzalez joel Saavedra Yerko vasquez Bin Wang Departamento de Ciencias Matematicas y Fisicas Universidad Catolica de TemucoMontt 56Casilla 15-DTemucoChile Facultad de Ingenieria y Ciencias Universidad Diego PortalesAvenida Ejercito Libertador 441Casilla 298-VSantiagoChile Instituto de Ffsica Pontificia Universidad Catolica de ValparaisoCasilla 4950ValparaisoChile Departamento de Ffsica Facultad de CienciasUniversidad de La SerenaAvenida Cistemas 1200La SerenaChile Center for Gravitation and Cosmology College of Physical Science and TechnologyYangzhou UniversityYangzhou 225009China

In this work we consider black hole solutions to Einstein’s theory coupled to a nonlinear powerlaw electromagnetic field with a fixed exponent *** study the extended phase space thermodynamics in canonical and grand canonical ensembles,where the varying cosmological constant plays the role of an effective thermodynamic *** examine thermodynamical phase transitions in such black holes and find that both first-and second-order phase transitions can occur in the canonical ensemble while,for the grand canonical ensemble,Hawking-Page and second-order phase transitions are allowed.

关键词： black hole thermodynamics nonlinear Maxwell

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Additive manufacturing of 18%nickel maraging steels:Defect,structure and mechanical properties:A review

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Journal of Materials Science & Technology 2022年第25期120卷 227-252页

作者： Lulu Guo Lina Zhang joel Andersson Olanrewaju Ojo Department of Mechanical Engineering University of ManitobaWinnipeg R3T 5V6Canada Department of Engineering Science University WestTrollh tan 46186Sweden

This paper reviews the latest research progress in the additive manufacturing(AM)process of 18%nickel maraging steels,which involves laser-based powder bed fusion(L-PBF),laser-based directed energy deposition(L-DED),and wire arc additive manufacturing(WAAM).The emphasis is on the defects,structure,and mechanical properties of the additive manufactured 18%nickel maraging *** first,this article outlines the influences of the processing parameters of AM techniques on the defects formed in the fabricated parts,in terms of the L-PBF and *** macrostructure and microstructure characteristics of as-built and heat-treated 18%nickel maraging steel are then described in ***,the mechanical properties of as-built and heat-treated 18%nickel maraging steel are assessed,such as their tensile,hardness,impact toughness,and fatigue ***,future directions for work on the AM of 18%nickel maraging steel are provided.

关键词： Additive manufacturing 18%Nickel maraging steel Defects Macrostructure Microstructure Mechanical properties

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Human endogenous retroviruses: ammunition for myeloid cells in neurodegenerative diseases?

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Neural Regeneration Research 2020年第6期15卷 1043-1044页

作者： joel Gruchot David Kremer Patrick Küry Department of Neurology NeuroregenerationMedical FacultyHeinrich-Heine-University

Activation of myeloid cells by human endogenous retroviral entities:While the exact causes of neurological diseases such as multiple sclerosis(MS)or amyotrophic lateral sclerosis(ALS)are still elusive,there is evidence of a new category of pathogenic elements called human endogenous retroviruses(HERvs)which seem to contribute to their evolution and progression by exerting inflammatory and degenerative effects(Kury et al.,2018).HERvs are ancient retroviral elements which account for up to 8%of the human genome and it is known that environmental factors can trigger their(re-)expression(Kury et al.,2018).The resulting production of viral particles and/or proteins,especially from members of the HERv-W and HERv-K family,is strongly correlated with the onset and progression of neurological diseases,such as MS and ALS(Kury et al.,2018).

关键词： endogenous diseases al.

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Dynamics of a Rotating Sphere on Free Surface of vibrated Granular Materials

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Chinese Physics Letters 2018年第8期35卷 44-48页

作者： Adones B.Dengal joel T.Maquiling Geophysics Research Laboratory Department of Physics School of Science and EngineeringAteneo de Manila University Department of Physics College of Natural Sciences and Mathematics Mindanao State University

We investigate the rotational dynamics of a low-density sphere on the free surface of a vertically vibrated granular material（vGM）. The dynamical behavior of the sphere is influenced by the external energy input from an electromagnetic shaker which is proportional to ε,where ε is equal to the ratio between the square of the dimensionless acceleration Γ and the square of the vibration frequency f of the container. Empirical results reveal that as the vGM transits from local-to-global convection,an increase in ε generally corresponds to an increase in the magnitudes of the rotational ω（RS） and translational v（CM） velocities of the sphere, an increase in the observed tilting angle θ（bed） of the vGM bed, and a decrease in the time t（wall） it takes the sphere to roll down the tilted vGM bed and hit the container wall. During unstable convection, an increase in ε results in a sharp decrease in the sphere＇s peak and mean ω（RS）,and a slight increase in t（wall）.For the range of ε values covered in this study, the sphere may execute persistent rotation, wobbling or jamming, depending on the vibration parameters and the resulting convective flow in the system.

关键词： Dynamics of a Rotating Sphere on Free Surface of vibrated Granular Materials

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High-throughput computational discovery of In_(2)Mn_(2)O_(7) as a high Curie temperature ferromagnetic semiconductor for spintronics

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npj Computational Materials 2019年第1期5卷 529-535页

作者： Wei Chen Janine George joel B.varley Gian-Marco Rignanese Geoffroy Hautier Institute of Condensed Matter and Nanoscicence(IMCN) Universitécatholique de Louvain1348 Louvain-la-NeuveBelgium Lawrence Livermore National Laboratory LivermoreCA 94550USA

Materials combining strong ferromagnetism and good semiconducting properties are highly desirable for spintronic applications(e.g.,in spin-filtering devices).In this work,we conduct a search for concentrated ferromagnetic semiconductors through highthroughput computational *** screening reveals the limited availability of semiconductors combining ferromagnetism and a low effective *** identify the manganese pyrochlore oxide In_(2)Mn_(2)O_(7) as especially promising for spin transport as it combines low electron effective mass(0.29m0),a large exchange splitting of the conduction band(1.1 ev),stability in air,and a Curie temperature(about 130 K)among the highest of concentrated ferromagnetic *** rationalise the high performance of In_(2)Mn_(2)O_(7) by the unique combination of a pyrochlore lattice favouring ferromagnetism with an adequate alignment of O–2p,Mn–3d,and In–5s forming a dispersive conduction band while enhancing the Curie temperature.

关键词： temperature ferromagnetic semiconductors

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Synthesis and Crystal Structure of tert-Butyl(((2R,3R,6R)-3-hydroxy-6-(nitromethyl)-3,6-dihydro-2H-pyran-2-yl)methyl)carbonate

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Chinese Journal of Structural Chemistry 2021年第9期40卷 1205-1212,1110页

作者： FENG Yong-Kui SU Hua-Lan MUKULA OTUKOL Billy joel ZHANG Xue-Qing YAO Hui HUANG Nian-Yu Hubei Key Laboratory of Natural Products Research and Development Key Laboratory of Functional Yeast(China National Light Industry)College of Biological and Pharmaceutical SciencesChina Three Gorges UniversityTichangHubei 443002China

In this paper,aβ-C-pyranogalactoside(Ⅸ)was synthesized from D-galactose through a nine-step reaction with a total yield of 32%under the palladium catalyst,and its structure was characterized by nuclear magnetic resonance(NMR)and high-resolution electrospray ionization mass spectrometry(HR-ESI-MS).The absolute configuration of this pyranogalactoside was confirmed with a Flack parameter of–0.01(6)by X-ray crystallography using a Cu radiation ***(Ⅸ),C_(12)H_(19)NO_(7),crystal data:monoclinic system,space group P2_(1)2_(1)2_(1),a=8.53480(10),b=9.4207(2),c=18.1308(3)A,v=1457.79(4)A^(3),Z=4,F(000)=616,Dc=1.318 g/cm^(3),μ=0.931 mm^(-1),R=0.0294 and wR=0.0752 for 2875 independent reflections(R_(int)=0.0163)and 2857 observed ones(I>2σ(I)).

关键词： X-ray diffraction crystal structure absolute configuration β-C-pyranogalactoside α-glucosidase inhibitory activity

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