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

页码：2316 / 2319

页数：4

共 22 条

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