通过二烷基二硫化物吸附功能化的金纳米颗粒和银纳米颗粒

Gold and Silver Nanoparticles Functionalized by the Adsorption of Dialkyl Disulfides.

作者信息

Porter Lon A, Ji David, Westcott Sarah L, Graupe Michael, Czernuszewicz Roman S, Halas Naomi J, Lee T Randall

机构信息

Department of Chemistry, University of Houston, Houston, Texas 77204-5641, and Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005.

出版信息

Langmuir. 1998 Dec 22;14(26):7378-7386. doi: 10.1021/la980870i.

DOI:10.1021/la980870i

PMID:31416111

Abstract

The formation of three-dimensional self-assembled monolayers (3-D SAMs) generated by the adsorption of -octadecyl disulfide onto colloidal gold and silver nanoparticles is described. The functionalized nanoparticles were characterized by solubility, transmission electron microscopy, ultraviolet-visible spectroscopy, H nuclear magnetic resonance spectroscopy, surface-enhanced Raman spectroscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. On gold nanoparticles, this new functionalization method affords crystalline 3-D SAMs that are indistinct from those prepared by the analogous adsorption of -octadecanethiol. On silver nanoparticles, however, the films derived from -octadecyl disulfide appear to be somewhat less crystalline than those prepared similarly from -octadecanethiol. The origin of this difference is briefly explored and discussed.

摘要

本文描述了通过将十八烷基二硫化物吸附到胶体金和银纳米颗粒上而形成的三维自组装单分子层（3-D SAMs）。通过溶解度、透射电子显微镜、紫外可见光谱、氢核磁共振光谱、表面增强拉曼光谱、傅里叶变换红外光谱和X射线光电子能谱对功能化的纳米颗粒进行了表征。在金纳米颗粒上，这种新的功能化方法提供了与通过十八烷硫醇的类似吸附制备的晶体3-D SAMs没有区别的晶体。然而，在银纳米颗粒上，由十八烷基二硫化物衍生的薄膜似乎比由十八烷硫醇类似制备的薄膜结晶度稍低。简要探讨并讨论了这种差异的起源。