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Unveiling multimodal hot carrier excitation in plasmonic bimetallic Au@Ag nanostars for photochemistry and SERS sensing

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Nano Research 2024年第12期17卷 10355-10362页

作者： Yoel Negrín-Montecelo Amir Elsaidy Jesús Giráldez-Martínez Enrique Carbó-Argibay Zhiming Wang Alexander O.Govorov Ramon A.Alvarez-Puebla Miguel A.Correa-Duarte lucas v.besteiro Department of Physical and Inorganic Chemistry Universitat Rovira i VirgiliCarrer de Marcel∙líDomingo s/nTarragona 43007Spain Department of chemical engineering Military Technichal CollegeCairo 4393010Egypt CINBIO University of VigoCampus Universitario de VigoLagoas MarcosendeVigo 36310Spain International Iberian Nanotechnology Laboratory Av.Mestre JoséVeiga s/nBraga 4715-330Portugal Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China Department of Physics and Astronomy Ohio UniversityAthensOhio 45701USA ICREA Passeig Lluís Companys 23Barcelona 08010Spain Southern Galicia Institute of Health Research(IISGS)and Biomedical Research Networking Center for Mental Health(CIBERSAM) Universidade de VigoVigo 36310Spain

Plasmonic nanostructures stand at the forefront of nanophotonics research,particularly in sensing and energy conversion *** unique ability to confine light energy at the nanoscale makes them indispensable for a wide array of technological *** study of these structures often makes use of different materials and,even more extensively,explores new shapes and configurations to extend our common repertoire of useful nanophotonics *** the creation of bimetallic plasmonic nanostructures combines these two dimensions determining the space of possible plasmonic resonators and opens the possibility of tailoring systems with behavior unavailable to single-metal plasmonic *** this paper,we delve into the exploration of bimetallic systems employing plasmonic *** structures have demonstrated remarkable capabilities for surface-enhanced Raman scattering(SERS)spectroscopy and photochemistry,due to the strong plasmonic response of their peaks,whose disposition following a spherical symmetry makes them largely polarization-and ***,we report the colloidal synthesis of two different water-stable Au@Ag nanostars,explore their performance as photocatalysts and SERS substrates,and provide an in-depth account of their non-trivial physical response.

关键词： hot-electrons field enhancement nanohybrids photocatalysis surface-enhanced Raman scattering(SERS) plasmonics

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Directional radiation enhancement of nanowire quantum dots based on line-array plasmonic antenna coupling

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Photonics Research 2022年第9期10卷 2178-2190页

作者： PEIHANG LI PENG YU JIACHEN SUN ZHIMIN JING JIANG WU lucas v.besteiro ROBERTO CAPUTO ARUP NEOGI HONGXING XU ZHIMING WANG Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China College of Optoelectronic Technology Chengdu University of Information TechnologyChengdu 610225China CINBIO Universidade de VigoVigo 36310Spain Physics Department University of CalabriaRende I-87036Italy School of Physics and Technology Center for Nanoscience and NanotechnologyWuhan UniversityWuhan 430072China Institute for Advanced Study Chengdu UniversityChengdu 610106China

The integration of a single III-v semiconductor quantum dot with a plasmonic nanoantenna as a means toward efficient single-photon sources(SPEs)is limited due to its weak,wide-angle emission,and low emission *** limitations can be overcome by designing a unique linear array of plasmonic antenna structures coupled to nanowire-based quantum dot(NWQD)emitters.A linear array of a coupled device composed of multiple plasmonic antennas at an optimum distance from the quantum dot emitter can be designed to enhance the directionality and the spontaneous emission rate of an integrated single-photon *** element modeling has been used to design these compact structures with high quantum efficiencies and directionality of single-photon emission while retaining the advantages of *** Purcell enhancement factor of these structures approaches 66.1 and 145.8,*** to a single NWQD of the same diameter,the fluorescence was enhanced by 1054 and *** predicted collection efficiencies approach 85%(numerical aperture,NA=0.5)and 80%(NA=0.5),*** single-photon emitters based on bulky conventional optics,this is a unique nanophotonic single-emission photon source based on a line-array configuration that uses a surface plasmon-enhanced design with minimum *** designs presented in this work will facilitate the development of SPEs with potential integration with semiconductor optoelectronics.

关键词： quantum coupling overcome

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Ultra-broadband nanowire metamaterial absorber

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Photonics Research 2022年第12期10卷 2718-2727页

作者： BAOQING WANG CUIPING MA PENG YU ALEXANDER O.GOvOROv HONGXING XU WENHAO WANG lucas v.besteiro ZHIMIN JING PEIHANG LI ZHIMING WANG College of Optoelectronic Technology Chengdu University of Information TechnologyChengdu 610225China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China Department of Physics and Astronomy and Nanoscale and Quantum Phenomena Institute Ohio UniversityAthensOhio 45701USA School of Physics and Technology Center for Nanoscience and NanotechnologyWuhan UniversityWuhan 430072China CINBIO Universidade de VigoVigo 36310Spain

Broadband absorbers generally consist of plasmonic cavities coupled to metallic resonators separated by a dielectric film,and they are vertically stacking *** this work,we propose an ultra-broadband nanowire metamaterial absorber composed of an array of vertically aligned dielectric nanowires with coaxial metallic *** absorber shows strong absorption from 0.2 to 7μm with an average absorption larger than 91%due to the excitation of gap surface plasmon polariton modes in Fabry–Perot-like ***,a refractory dielectric cladding can be added to improve the thermal stability of the absorber,showing a negligible impact on its absorption *** proposed absorber may find potential applications in solar energy harvesting,infrared imaging and spectroscopy,and optoelectronic devices.

关键词： absorber nanowires dielectric

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A low redox potential and long life organic anode material for sodium-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 557-564页

作者： Zhi Li Yang Wei Kang Zhou Xin Huang Xing Zhou Jie Xu Taoyi Kong Junwei lucas Bao Xiaoli Dong Yonggang Wang Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New Energy Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Fudan University Department of Chemistry Boston College School of Materials Science and Engineering Anhui University of Technology

Sodium-ion batteries （SIBs） with organic electrodes are an emerging research direction due to the sustainability of organic materials based on elements like C,H,O,and sodium ***,organic electrode materials for SIBs are mainly used as cathodes because of their relatively high redox potentials（>1 v）.Organic electrodes with low redox potential that can be used as anode are ***,a novel organic anode material （tetrasodium 1,4,5,8-naphthalenetetracarboxylate,Na4TDC） has been developed with low redox potential （v） and excellent cyclic *** three-sodium storage mechanism was demonstrated with various in-situ/ex-situ spectroscopy and theoretical calculations,showing a high capacity of 208 mAh/g and an average decay rate of merely 0.022%per ***,the Na4TDC-hard carbon composite can further acquire improved capacity and cycling stability for 1200 cycles even with a high mass loading of up to 20 mg *** pairing with a thick Na3v2（PO4）3cathode (20.6 mg cm-2),the as-fabricated full cell exhibited high operating voltage （2.8 v）,excellent rate performance and cycling stability with a high capacity retention of 88.7% after 200 cycles,well highlighting the Na4TDC anode material for SIBs.

关键词： Organic anode material Low redox potential Composite anode Sodium-ion batteries

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The crossroads of receptor-mediated signaling and endocytosis in plants

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Journal of Integrative Plant Biology 2018年第9期60卷 827-840页

作者： lucas Alves Neubus Claus Daniel v.Savatin Eugenia Russinova Department of Plant Biotechnology and Bioinformatics Ghent University9052 GhentBelgium Center for Plant Systems Biology VIB9052 GhentBelgium

Plants deploy numerous plasma membrane receptors to sense and rapidly react to environmental changes. Correct localization and adequate protein levels of the cell-surface receptors are critical for signaling activation and modulation of plant development and defense against pathogens. After ligand binding, receptors are internalized for degradation and signaling attenuation. However, one emerging notion is that the Iigand-induced endocytosis of reCeptor complexes is important for the signal duration, amplitude, and specificity. Recently, mutants of maior endocytosis players, including clathrin and dynamin, have been shown to display defects in activation of a subset of signal transduction pathways, implying that signaling in plants might not be solely restricted to the plasma membrane. Here, we summarize the up-to-date knowledge of receptor complex endocytosis and its effect on the signaling outcome, in the context of plant development and immunity.

关键词： The crossroads of receptor-mediated signaling and endocytosis in plants BRI PM

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Plant mineral nutrient sensing and signaling

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Journal of Integrative Plant Biology 2014年第3期56卷 190-191页

作者： Leon v.Kochian William J.lucas Robert W.Holley Center for Agriculture and Health USDA‐ARS Cornell University Department of Plant Biology College of Biological Sciences University of California

As terrestrial plants are sessile organisms and therefore must directly deal with an often complex and changing environment, they have had to develop complex and elegant strategies to survive and thrive in the face of environmental stress. This is particularly true for plant adaptation to the soil environment, where essential mineral nutrients often are found at sub- optimal levels and their concentrations can vary significantly, both spatially and temporally. Furthermore, plants also at times have to respond to excessively high and potentially toxic levels of essential nutrients, as well as toxic levels of non- essential metals and metalloids in the soil. Although plant mineral nutrition as a bona ~ide research discipline has a history of over 15o years, beginning with the pioneering work of Justus von Liebieg and others in the mid-1800＇s, it is only very recently that researchers have begun to truly appreciate how sophisticated plants are with regards to the sensing of their mineral status and the maintaining of mineral homeostasis in the plant.

关键词： Plant mineral nutrient sensing and signaling root

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Habitat productivity is a poor predictor of body size in rodents

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Current Zoology 2020年第2期66卷 135-143页

作者： Bader H.Alhajeri lucas M.v.Porto Renan Maestri Department of Biological Sciences Kuwait UniversitySafat13060Kuwait Department of Ecology Universidade Federal do Rio Grande do SulPorto AlegreRS91501-970Brazil

The"resource availability hypothesis"predicts occurrence of larger rodents in more productive *** prediction was tested in a dataset of 1,301 rodent *** used adult body mass as a measure of body size and normalized difference vegetation index(NDvI)as a measure of habitat *** utilized a cross-species approach to investigate the association between these *** was done at both the order level(Rodentia)and at narrower taxonomic *** applied phylogenetic generalized least squares(PGLS)to correct for phylogenetic *** relationship between body mas and NDvI was also investigated across rodent *** controlled for spatial autocorrelation using generalized least squares(GLS)*** cross-species approach found extremely low support for the resource availability *** was reflected by a weak positive association between body mass and NDvI at the order *** find a positive association in only a minority of rodent *** best fit GLS model detected no significant association between body mass and NDvI across ***,our results do not support the view that resource availability plays a major role in explaining geographic variation in rodent body size.

关键词： Bergmann's rule body size(body mass) habitat productivity heat conservation hypothesis normalized difference vegetation index(NDvI) resource availability hypothesis

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Praseodymium metal nanorods as a 5-fluorouracil carrier

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Journal of Rare Earths 2024年第7期42卷 1328-1336,I0005页

作者： varnitha Manikantan Govindaraj Sri varalakshmi Ujma Ashapak Tamboli Archana Sumohan Pillai Aleyamma Alexander Anushka lucas Bose Allben Akash Israel v.M.v.Enoch Centre for Nanoscience and Genomics Karunya Institute of Technology and Sciences(Deemed University)Coimbatore641114Tamil NaduIndia Department of Applied Chemistry Karunya Institute of Technology and Sciences(Deemed University)Coimbatore641114Tamil NaduIndia

Interest in metal nanoparticles as nanoscale drug-carrying vehicles has been *** such an aspect,lanthanide metal nanoparticles are particularly ***,we report praseodymium nanoparticles as a novel anticancer therapeutic transporting *** material was made as a composite with the supramolecular host polymer,poly-β-*** praseodymium nanorods were characterized using standard analytical techniques,including X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),and thermogravimetric analysis(TGA).In addition,they were imaged using transmission electron *** nanostructures are a long rod-shaped material with 2.0±0.1μm in length and 230±10 nm in *** material shows a saturation magnetization value above 30 emu/g with a coercivity value of 130 *** nanocarrier is freighted with the drug 5-fluorouracil,and the encapsulation efficiency is 76.09%.The drug release is continuous from the nanocarrier(polymer-containing praseodymium nanoparticles)and proceeds for above 250 *** in vitro cytotoxicities of the blank nanocarrier and the 5-fluorouracil-loaded one are deduced by testing them on MCF-7 and vero(non-cancerous)cell *** cytotoxicity on the cancerous cell lines is observed,whereas the non-cancerous cells are *** IC_(50)values on the cell lines are reported.

关键词： Metal nanoparticles Praseodymium Poly-cyclodextrin Drug delivery Anticancer activity Rare earths

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Anomalous moire pattern of graphene investigated by scanning tunneling microscopy： Evidence of graphene growth on oxidized Cu（111）

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Nano Research 2014年第1期7卷 154-162页

作者： Nicolas Reckinger Eloise van Hooijdonk Frederic Joucken Anastasia v. Tyurnina Stephane lucas Jean-Francois Colome~ Research Center in Physics of Matter and Radiation (PMR) University of Namur Rue de Bruxelles 6 1 B-5000 Namur Belgium

The growth of graphene on oriented （111） copper films has been achieved by atmospheric pressure chemical vapor deposition. The structural properties of as-produced graphene have been investigated by scanning tunneling microscopy. Anomalous moir6 superstructures composed of well-defined linear periodic modulations have been observed. We report here on comprehensive and detailed studies of these particular moir6 patterns present in the graphene topography revealing that, in certain conditions, the growth can occur on the oxygen-induced reconstructed copper surface and not directly on the oriented （111） copper film as expected.

关键词： graphene scanning tunnelingmicroscopy Cu(111) copper oxidation atmospheric pressurechemical vapor deposition

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Synthesis and graphitization of resole resins by ferrocene

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Progress in Natural Science:Materials International 2019年第1期29卷 71-80页

作者： S.I.Talabi A.P.Luz v.C.Pandolfelli J.S.Bernardes A.A.lucas Federal University of S?o Carlos Materials Engineering Department University of Ilorin Materials and Metallurgical Engineering Department National Nanotechnology Laboratory (LNNano) National Center for Energy and Materials (CNPEM)

Commercial(Rs) and laboratory synthesized resoles(LSRs) containing 3–5 wt% ferrocene have been used to study the development of thermosetting resin compositions as binder materials for carbon-containing refractories(CCRs) production. The LSRs were developed based on formaldehyde to phenol 1.5 mol.%(1.5 Rs) and 2.0 mol.%(2 Rs). Microstructure and oxidation resistance of carbons derived from plain and modified resins have been compared. Chemical structure of the resins was studied using Fourier Transform InfraRed-Attenuated Total Reflection(FTIR-ATR) spectroscopy. X-ray Photoelectron spectroscopy was used to examine chemical changes during heat treatment of the modified products. Flow behavior of plain and formulated resins has been measured under isothermal condition. Rheology measurement results show that the selected amount of ferrocene did not affect the resin near-Newtonian fluid behavior and processability during refractory production. X-ray diffraction(XRD) analysis and transmission Electron Microscope(TEM) were used to characterize the derived carbon samples after thermal treatment of the resins. The results demonstrate that ferrocene is an excellent additive for crystallizing resoles carbon. The presence of fringes in TEM images indicates the graphitized carbon microstructure. The carbon reactivity in an oxidizing environment was also determined via thermogravimetric analyzer(TGA). Several factors, such as bond strength and atoms arrangement, have been found to control the carbonized modified-resin oxidation resistance.

关键词： Resole resins Synthesis Graphitization Microstructure Oxidation resistance

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