Using Good's Buffers To Control the Anisotropic Structure and Optical Properties of Spiky Gold Nanoparticles for Refractive Index Sensing

被引：57

作者：

Pallares, Roger M. ^{[1
]}

Stilson, Terrence ^{[1
]}

Choo, Priscilla ^{[1
]}

Hu, Jingtian ^{[2
]}

Odom, Teri W. ^{[1
,2
,3
]}

机构：

[1] Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA

[2] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

[3] Northwestern Univ, Int Inst Nanotechnol, Evanston, IL 60208 USA

来源：

ACS APPLIED NANO MATERIALS | 2019年 / 2卷 / 08期

基金：

美国国家科学基金会; 美国国家卫生研究院;

关键词：

spiky gold nanoparticles; gold nanostars; anisotropic gold nanoparticles; nanoparticle synthesis; Good's buffers; refractive index sensitivity; NANOSTARS; SHAPE; RELAXIVITY; NANORODS; SIZE;

D O I：

10.1021/acsanm.9b01117

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Spiky gold nanoparticles show structure-tunable optical properties. Most synthetic procedures, however, cannot independently manipulate the overall particle shape, core size, and spike features. Furthermore, conventional protocols rely on cytotoxic and/or strongly bound surfactants that limit applications. This paper reports a set of parameters to manipulate the anisotropic features of spiky gold nanoparticles grown by using different biocompatible Good's buffers through a seed-mediated synthesis. Spike dimensions were preserved even when large seeds (up to 100 nm) were used. Finally, we obtained particles with high sensitivity to changes in the refractive index of the surroundings by tuning the spike length and width.

引用

页码：5266 / 5271

页数：11

共 32 条

[1] Tuning Size and Sensing Properties in Colloidal Gold Nanostars [J].