DYNAMICS OF WEAKLY CONNECTED SOLIDS - SILICA AEROGELS

被引：37
|
作者：
SCHAEFER, DW [1 ]
BRINKER, CJ [1 ]
RICHTER, D [1 ]
FARAGO, B [1 ]
FRICK, B [1 ]
机构：
[1] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE
来源：
PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 19期
关键词：
D O I：
10.1103/PhysRevLett.64.2316
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Apply neutron spin-echo spectroscopy, we investigate low-energy vibrational excitations in a series of silica aerogels of varying connectivity. Connectivity is adjusted both by precursor solution chemistry and by heat treatment. Polymeric aerogels show fractonlike densities of states, whereas colloidal materials exhibit a peak.
引用
收藏
页码：2316 / 2319
页数：4
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