Capping effect of CTAB on positively charged Ag nanoparticles

被引：211

作者：

Sui, Z. M.

Chen, X. ^{[1
]}

Wang, L. Y.

Xu, L. M.

Zhuang, W. C.

Chai, Y. C.

Yang, C. J.

机构：

[1] Shandong Univ, Key Lab Colloid & Interface Chem, Minist Educ, Jinan 250100, Peoples R China

[2] Jinan Univ, Sch Chem & Chem Engn, Shandong 250022, Peoples R China

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2006年 / 33卷 / 02期

基金：

中国国家自然科学基金;

关键词：

silver nanoparticles; CTAB; bilayer; SAXS;

D O I：

10.1016/j.physe.2006.03.151

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A facial synthesis process of silver nanoparticles (NPs) capped by cetyltrimethylammonium bromide (CTAB) is reported with exploration for the capping effect of CTAB on particles' stability and surface properties in aqueous medium. Multidisciplinary approaches including electrophoresis, UV-visible absorption spectroscopy, Fourier-transformed infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), thermal gravimetric analysis (TGA) and small angle X-ray scattering (SAXS) are conducted to systematically investigate surface charge and the adsorbed CTAB layer structure on Ag clusters. Obtained results indicate that CTAB molecules bind strongly to silver surface via their headgroups and form a bilayer shell. Detailed analysis of SAXS and NMR data and discussion on the interaction between CTAB molecules and NPs' surface, provide a clearer model of capped molecules on Ag clusters. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：308 / 314

页数：7

共 71 条

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