金纳米颗粒在二氧化钛上的声化学沉积以及金熔点的显著降低。

Sonochemical deposition of Au nanoparticles on titania and the significant decrease in the melting point of gold.

作者信息

Pol Vilas G, Wildermuth G, Felsche J, Gedanken Aharon, Calderon-Moreno J

机构信息

Department of Chemistry, and Kanbar Laboratory for Nanomaterials at the Bar-Ilan University Center for Advanced Materials and Nanotechnology, Bar-Ilan University, Ramat-Gan 52900, Israel.

出版信息

J Nanosci Nanotechnol. 2005 Jun;5(6):975-9. doi: 10.1166/jnn.2005.137.

DOI:10.1166/jnn.2005.137

PMID:16060163

Abstract

In this article, sub-micron size particles of titania were coated by a nanosized gold particles with the aid of power ultrasound. We could achieve a uniform coating of gold nanoparticles on a titania surface with a maximum gold loading of 10 wt%. In addition, we report on the experimental evidence for a significant decrease in the melting point of gold nanoparticles (<2 nm) by approximately 850 degrees C from that of the bulk material.

摘要

在本文中，借助功率超声将纳米尺寸的金颗粒包覆在亚微米尺寸的二氧化钛颗粒上。我们能够在二氧化钛表面实现金纳米颗粒的均匀包覆，最大金负载量为10 wt%。此外，我们报告了实验证据，表明金纳米颗粒（<2 nm）的熔点相较于块状材料显著降低了约850摄氏度。