Ultrafast dynamics of shock waves in polymers and proteins: The energy landscape

被引：23

作者：

Kim, HJ ^{[1
]}

Hambir, SA ^{[1
]}

Dlott, DD ^{[1
]}

机构：

[1] Univ Illinois, Sch Chem Sci, Urbana, IL 61801 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.83.5034

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A 4.5 GPa shock pulse producing a cycle of compression heating (<25 ps) and expansion cooling (similar to 1.5 ns) is used to study fast mechanical dynamics of solid organic polymers and proteins. Coherent Raman spectroscopy of a dye in the sample shows that compression occurs by an instantaneous part followed by a second, similar to 300 ps, structural relaxation process. After expansion, a mechanically distorted structure is produced which does not relax on the <15 ns time scale. The results are interpreted with an energy landscape model.

引用

页码：5034 / 5037

页数：4

共 16 条

[1] COMPARISON OF A VISCOELASTIC THEORY OF SOLVATION DYNAMICS TO TIME-RESOLVED EXPERIMENTS IN A NONPOLAR SOLUTION [J].