Study of silica aerogel grain surfaces by using a positron age-momentum correlation technique

	Study of silica aerogel grain surfaces by using a positron age-momentum correlation technique
	Suzuki, N; Oonishi, T; Hyodo, T; Chang, T
刊名	APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
	2002
卷号	74 期号:6 页码:791-795
通讯作者	Univ Tokyo, Inst Phys, Grad Sch Arts & Sci, Meguro Ku, Tokyo 1538902, Japan ; Inst High Energy Phys, Nat Lab, Beijing 100080, Peoples R China
英文摘要	The effect of heat treatment on silica aerogel has been studied by a positron age-momentum correlation technique and infrared measurement. A difference was observed between the momentum distributions of the electrons on the first layers of the silica aerogel grain surfaces and the electrons in the grains in an as-supplied sample, but not in the sample heat treated at 800 degreesC. A large change in the S parameter for the momentum distribution of the electrons on the first layer occurs around 200 degreesC. This change correlates well with that of the infrared spectra, which show oxidation of the methoxyl groups at temperatures above around 200 degreesC. This correlation reveals that those groups are mainly located on the first layer of the silica grains.
学科主题	Materials Science; Physics
类目[WOS]	Materials Science, Multidisciplinary ; Physics, Applied
研究领域[WOS]	Materials Science ; Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000175356200013
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/238498]
专题	高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Suzuki, N,Oonishi, T,Hyodo, T,et al. Study of silica aerogel grain surfaces by using a positron age-momentum correlation technique[J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING,2002,74(6):791-795.
APA	Suzuki, N,Oonishi, T,Hyodo, T,&Chang, T.(2002).Study of silica aerogel grain surfaces by using a positron age-momentum correlation technique.APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING,74(6),791-795.
MLA	Suzuki, N,et al."Study of silica aerogel grain surfaces by using a positron age-momentum correlation technique".APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING 74.6(2002):791-795.