Localized Surface Plasmon Resonance of Metallic Nanoparticles--Optical Property Characterization for Rational Applications

在光的激发下金属纳米结构中的自由电子能够发生群体性的振荡，进而产生表面等离激元（SPP）。发生等离激元共振时，金属纳米结构会将光束缚在表面，并在表面产生极强的电场增强。表面等离激元有两种类型：一类具有传播的特点，其表面等离激元能够在表面传播，称之为propagatingSPP；另一类不具有传播性，共振局域在一个很小的金属结构中，称之为localizedSPP，即局域表面等离激元共振（LSPR）。金属纳米颗粒就具有很强的表面等离激元共振的（LSPR）性质，使其对光产生增强的吸收和增强的散射，并表现出相关的热、光电场增强和热电子等效应。近年，随着纳米科技的发展，金属纳米粒子的LSPR效应已经成为一...The collective oscillation of free electrons in metal nanostructures excited with light is called surface plasmon polaritons (SPP). The light will be confined to a small area on the surface under the resonance condition (SPR), thus a giant enhancement in the electric field will be produced. There are two kinds of surface plasmon polaritons (SPP): one is propagating plasmon polaritons (PSPP), which...学位：理学博士院系专业：化学化工学院_物理化学(含化学物理)学号：2052010015366

Preparation and Characterization of Clean and Uniform Substrates for Surface-Enhanced Raman Spectroscopy

作者简介: 任斌, 男, 博士, 教授, 博士生导师, 主要从事光谱电化学研究. E-mail : [email protected][中文文摘]采用盐酸羟胺种子生长法制备60 nm左右的粒径均一的金纳米粒子,通过在ITO上修饰3-氨基丙基-三甲氧基硅烷(APTMS)对金纳米粒子进行组装,得到组装密度较高、均一的表面增强拉曼光谱(SERS)基底;采用等离子体清洗再用醋酸溶液浸泡除去氧化层的方法,可获得干净的SERS基底,这种方法与其它基底除杂方法相比更为简单、操作性强且信号只衰减了20%。[英文文摘]Gold nanoparticles with uniform size and shape distribution were synthesized by hydroxylamine seed-mediated growing method.High density and uniform SERS(surface-enhanced Raman spectroscopy) substrates were obtained by assembling Au nanoparticles on the indium tin oxide(ITO) substrates which had been modified with(3-aminopropyl) trimethoxysilane(APTMS).Clean SERS substrates have been obtained by cleaning the assembled substrate in Plasma cleaner followed by immersion in acetic acid to remove the surface oxides.This method to remove the contaminants on the surface appears to be very simple, which only lead to a decrease of signal by 20% .973项目(2009CB930703,2007CB935603); 国家自然科学基金(20673086,20825313,20827003

Enhancing the Photothermal Stability of Plasmonic Metal Nanoplates by a Core-Shell Architecture

通讯作者地址: Zheng, NF (通讯作者),Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 2. Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 电子邮件地址: [email protected] core shell bimetal nanoplates: A facile seeded-growth strategy is developed to prepare uniform plasmonic Pd@Ag core-shell bimetallic nanoplates. The as-prepared Pd@Ag nanoplates are not only uniform in both size and shape, but also display tunable SPR properties and significantly enhanced photothermal stability as compared with 2D pure-Ag nanostructures. They can thus be readily used as stable substrates for MR surface-enhanced Raman scattering and as NIR absorbers for photothermal cancer therapy.NSFC 21021061,20925103,20923004,20871100 Fok Ying Tung Education Foundation 121011 MOST of China 2011CB932403,2009CB930703 NSF of Fujian Province 2009J06005 Key Scientific Project of Fujian Province 2009HZ0002-