Shape separation of gold nanoparticles using a pH-responsive amphiphilic dendrimer according to their shape anisotropy distinction

被引：6

作者：

Hao, Minjia ^{[1
]}

Liu, Cheng ^{[2
]}

Peng, Ling ^{[3
]}

Li, Jinru ^{[1
]}

Lu, Wensheng ^{[1
]}

Jiang, Long ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, CAS Key Lab Colloids & Surfaces, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China

[2] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China

[3] Aix Marseille Univ, CNRS, UMR 7325, Ctr Interdisciplinaire Nanosci Marseille, F-13288 Marseille, France

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2015年 / 437卷

基金：

中国国家自然科学基金;

关键词：

Gold nanoplates; Amphiphilic cationic dendrimer; Separation; Purification; NANORODS; MORPHOLOGY; EVOLUTION;

D O I：

10.1016/j.jcis.2014.09.052

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We present a novel method for shape-selective separation of nanoparticles in aqueous media utilizing an amphiphilic cationic dendrimer (C18N5) through regulation of the pH of the dispersion medium. This amphiphilic dendrimer (C18N5) bears a poly(amidoamine) dendron with four terminal amine groups and one hydrophobic long alkyl chain, and it can strongly adsorb to the surface of gold nanoparticles at low pH and promote their aggregation at high pH. During aggregation, isotropic NPs with smaller inter-particle contact area have much better solution stability than anisotropic NPs. Therefore, isotropic NPs remain stable in the supernatant, while anisotropic NPs are subject to aggregation and subsequent precipitation. As a result of this simple separation strategy, gold nanoplates with a purity level of 97% (in number density) can be rapidly and conveniently achieved. (C) 2014 Elsevier Inc. All rights reserved.

引用

页码：311 / 315

页数：5

共 27 条

[1] Fabrication of large-scale gold nanoplate films as highly active SERS substrates for label-free DNA detection [J].

Bi, Liyan ;

Rao, Yanying ;

Tao, Qin ;

Dong, Jian ;

Su, Ting ;

Liu, Fangjing ;

Qian, Weiping .

BIOSENSORS & BIOELECTRONICS, 2013, 43 :193-199

[2]

Gaudig T.D., 2009, SMALL, V5, P432

[3] Structure and Surface Chemistry of Gold-Based Model Catalysts [J].

Gong, Jinlong .

CHEMICAL REVIEWS, 2012, 112 (05) :2987-3054

[4] High-purity gold nanobipyramids can be obtained by an electrolyte-assisted and functionalization-free separation route [J].

Guo, Zhirui ;

Wan, Yu ;

Wang, Meng ;

Xu, Lina ;

Lu, Xiang ;

Yang, Guang ;

Fang, Kun ;

Gu, Ning .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2012, 414 :492-497

[5] Shape separation of colloidal gold nanoparticles through salt-triggered selective precipitation [J].

Guo, Zhirui ;

Fan, Xu ;

Xu, Lina ;

Lu, Xiang ;

Gu, Chunrong ;

Bian, Zhiping ;

Gu, Ning ;

Zhang, Jinan ;

Yang, Di .

CHEMICAL COMMUNICATIONS, 2011, 47 (14) :4180-4182

[6] Cancer cell imaging and photothermal therapy in the near-infrared region by using gold nanorods [J].

Huang, XH ;

El-Sayed, IH ;

Qian, W ;

El-Sayed, MA .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (06) :2115-2120

[7] Bioimaging with Two-Photon-Induced Luminescence from Triangular Nanoplates and Nanoparticle Aggregates of Gold [J].

Jiang, Yuqiang ;

Horimoto, Noriko Nishizawa ;

Imura, Kohei ;

Okamoto, Hiromi ;

Matsui, Ko ;

Shigemoto, Ryuichi .

ADVANCED MATERIALS, 2009, 21 (22) :2309-+

[8] Purification of high aspect ratio gold nanorods: Complete removal of platelets [J].

Khanal, Bishnu P. ;

Zubarev, Eugene R. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (38) :12634-+

[9]

Kim C, 2010, NAT CHEM, V2, P962, DOI [10.1038/NCHEM.858, 10.1038/nchem.858]

[10] Defining Rules for the Shape Evolution of Gold Nanoparticles [J].

Langille, Mark R. ;

Personick, Michelle L. ;

Zhang, Jian ;

Mirkin, Chad A. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2012, 134 (35) :14542-14554

← 1 2 3 →