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

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 

机构地区：[1]Department of Physical and Inorganic Chemistry,Universitat Rovira i Virgili,Carrer de Marcel∙líDomingo s/n,Tarragona 43007,Spain [2]Department of chemical engineering,Military Technichal College,Cairo 4393010,Egypt [3]CINBIO,University of Vigo,Campus Universitario de Vigo,Lagoas Marcosende,Vigo 36310,Spain [4]International Iberian Nanotechnology Laboratory,Av.Mestre JoséVeiga s/n,Braga 4715-330,Portugal [5]Institute of Fundamental and Frontier Sciences,University of Electronic Science and Technology of China,Chengdu 610054,China [6]Department of Physics and Astronomy,Ohio University,Athens,Ohio 45701,USA [7]ICREA,Passeig Lluís Companys 23,Barcelona 08010,Spain [8]Southern Galicia Institute of Health Research(IISGS)and Biomedical Research Networking Center for Mental Health(CIBERSAM),Universidade de Vigo,Vigo 36310,Spain

出　　处：《Nano Research》2024年第12期10355-10362,共8页纳米研究（英文版）

基　　金：supported by the projects PID2020-120306RB-I00,PID2020-118282RA-I00,PID2020-113704RB-I00;TED2021-130038A-I00,TED2021-132101B-I00,RYC2021-033818-I,PDC2021-121787-I00,and FPU21/03137,funded by MCIN/AEI/10.13039/501100011033 and European Union“NextGenerationEU”/PRTR;ED431C 2022/24 funded by Xunta de Galicia;2020SGR00166 funded by Generalitat de Cataluña;2021PFR-URV-B2-02 funded by Universitat Rovira i Virgili;HORIZON-EIC-2022-PATHFINDERCHALLENGES-01-06(No.101115149);HORIZON-HLTH-2022-DISEASE-06-TWOSTAGE(No.101080889);funded by the European Union Horizon 2020 Research and Innovation Program。

摘　　要：Plasmonic nanostructures stand at the forefront of nanophotonics research,particularly in sensing and energy conversion applications.Their unique ability to confine light energy at the nanoscale makes them indispensable for a wide array of technological advancements.The 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 tools.Exploring 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 structures.In this paper,we delve into the exploration of bimetallic systems employing plasmonic nanostars.These 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 orientationinsensitive.Herein,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 

分 类 号：TB383[一般工业技术—材料科学与工程]