Total Internal Reflection-based Extinction Spectroscopy of Single Nanoparticles
作者单位：State Key Laboratory of Analytical Chemistry for Life ScienceSchool of Chemistry and Chemical EngineeringNanjing University
会议名称：《第二十届全国光散射学术会议（CNCLS20）》
会议日期：2019年
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070205[理学-凝聚态物理] 070302[理学-分析化学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学]
关 键 词：single nanoparticle spectroscopy extinction spectroscopy total internal reflection
摘 要：Recently,we reported the wide-field total internal reflection-based extinction spectroscopy(TIRES) to measure extinction spectra of individual dielectric,plasmonic or light-absorbing *** capabilities were enabled via evanescent wave illumination which gave a dramatically improved reflectance change(ΔI/I) up to tens of *** detection limit of TIRES was down to 28-nm gold nanoparticle and 57-nm polystyrene *** was further surprisingly found that the scattering and absorption of light contributes to the bright and dark centroids,respectively,in the wavelength-dependent TIR images of a nanoparticle,allowing for distinguishing the two components from the total extinction *** present work not only provides a novel tool for single nanoparticle imaging and spectroscopy,but also holds great potential in studying anisotropic nanomaterials with the unique incidence– and polarization-tunable features.