Loading…

Synthesis of rod-like silica–gold core-shell structures

[Display omitted] ► Uniform silica rods have been prepared by using a new recipe. ► Thin gold shells on aminopropyl-modified silica rods were obtained by reduction of tetrachloroauric acid with borohydride. ► Thicker gold shells on aminopropyl-modified silica rods were prepared by reduction of tetra...

Full description

Saved in:
Bibliographic Details
Published in:Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2012-01, Vol.393, p.37-41
Main Authors: Choma, Jerzy, Jamioła, Dominik, Nyga, Piotr, Jaroniec, Mietek
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] ► Uniform silica rods have been prepared by using a new recipe. ► Thin gold shells on aminopropyl-modified silica rods were obtained by reduction of tetrachloroauric acid with borohydride. ► Thicker gold shells on aminopropyl-modified silica rods were prepared by reduction of tetrachloroauric acid with formaldehyde. Synthesis of rod-like silica–gold core-shell structures is reported by using silica rods having length of ∼1 μm and diameter of ∼200 nm. Before deposition of gold nanoparticles the aforementioned silica rods were modified by using 3-aminopropyltrimethoxysilane (APTMS) in order to attach aminopropyl groups and consequently, to facilitate deposition of Au. There methods were used to deposit Au nanoparticles. The first method of deposition was performed by using nanosized Au nanoparticles obtained by reduction of tetrachloroauric acid with borohydride. The second route was performed by direct reduction of tetrachloroauric acid with formaldehyde, which led to the formation of Au nanoparticles of about 50 nm. In the third route Au nanoparticles were obtained by reduction tetrachloroauric acid with borohydride but their deposition was carried out on the silica rods pre-decorated with small Au colloids. Each of these methods led to the formation of Au less or more uniform nanoshells on siliceous rods.
ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2011.10.021