材料科学
聚乙烯吡咯烷酮
纳米技术
胶体金
制作
纳米壳
纳米颗粒
多孔性
纳米结构
纳米孔
拉曼散射
等离子体子
催化作用
化学工程
拉曼光谱
高分子化学
有机化学
复合材料
光电子学
化学
病理
工程类
物理
光学
替代医学
医学
作者
Tae-Hyeon Park,Dong‐Won Jeong,Jung Ho Lee,Du‐Jeon Jang
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2022-01-19
卷期号:33 (15): 155605-155605
被引量:2
标识
DOI:10.1088/1361-6528/ac46b6
摘要
Highly branched gold nanoshells (BAuNSs) having hollow and porous morphologies have been fabricated via a seed-assembly-mediated strategy. Gold seed assemblies can be prepared by removal of SiO2nanotemplates with help of polyvinylpyrrolidone (PVP) molecules, which weakly link gold nanoparticles together even after SiO2etching. L-3,4-dihydroxy phenylalanine (L-DOPA) and AgNO3are employed as shape-directing agents to induce the anisotropic growth of gold. BAuNSs exhibit 7.4 and 4.4 times stronger activities than SiO2@Au nanoparticles in catalysis and surface-enhanced Raman scattering (SERS) applications, respectively, due to their large surface areas and numerous hot spots. It is necessary to find the optimal amount of gold deposition in fabrication to effectively utilize the hollow and porous morpologies of BAuNSs for catalysis and SERS applications. Overgrown nanobranches can fill the nanopores and nanogaps of BAuNSs, resulting in decrease of activities in applications. Overall, the seed-assembly-mediated fabrciation can be employed to produce plasmonic nanostructures having unique morphologies and high application activities.
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