Structure of Ru-Ti oxide aerogels: a SANS study

被引：9

作者：

Merzbacher, CI ^{[1
]}

Barker, JG

Swider, KE

Rolison, DR

机构：

[1] USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA

[2] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[3] USN, Res Lab, Div Chem, Washington, DC 20375 USA

来源：

ADVANCES IN COLLOID AND INTERFACE SCIENCE | 1998年 / 76卷

基金：

美国国家科学基金会;

关键词：

aerogel; SANS; contrast matching; ruthenium-titanium oxide; nanoscale structure;

D O I：

10.1016/S0001-8686(98)00041-4

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：

Small-angle neutron scattering (SANS) has been used to characterize Ru-Ti oxide aerogels annealed under various atmospheres and temperatures. The pores were filled with H(2)O/D(2)O solutions that match the scattering properties of either RuO(2) or TiO(2), therefore scattering from the remaining unmatched phase is measured independently. The structure of the RuO(2), and TiO(2), components of the aerogel detected by SANS depends more on annealing temperature than annealing atmosphere. The results are consistent with a branched, polymeric network made up of 8-16 nm TiO(2), particles and < 5-nm RuO(2), particles. The SANS results are supported by TEM. This study demonstrates that contrast-matching SANS is complementary to other techniques for characterizing the structure of two-phase aerogels. Published by Elsevier Science B.V.

引用

页码：57 / 69

页数：13