Surface dynamics of polymer films -: art. no. 068302

被引：170
|
作者：
Kim, H [1 ]
Rühm, A
Lurio, LB
Basu, JK
Lal, J
Lumma, D
Mochrie, SGJ
Sinha, SK
机构：
[1] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA
[2] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA
[3] Los Alamos Natl Lab, LANSCE, Los Alamos, NM 87545 USA
[4] Sogang Univ, Dept Phys, Seoul 121742, South Korea
[5] MIT, Ctr Mat Sci & Engn, Cambridge, MA 02139 USA
[6] Max Planck Inst Met Res, Stuttgart, Germany
[7] No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA
[8] Univ Illinois, Mat Res Lab, Urbana, IL 61801 USA
[9] Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA
[10] Yale Univ, Dept Phys & Appl Phys, New Haven, CT 06520 USA
来源：
PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 06期
关键词：
D O I：
10.1103/PhysRevLett.90.068302
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The dynamics of supported polymer films were studied by probing the surface height fluctuations as a function of lateral length scale using x-ray photon correlation spectroscopy. Measurements were performed on polystyrene (PS) films of thicknesses varying from 84 to 333 nm at temperatures above the PS glass transition temperature. Within a range of wave vectors spanning 10(-3) to 10(-2) nm(-1), good agreement is found between the measured surface dynamics and the theory of overdamped thermal capillary waves on thin films. Quantitatively, the data can be accounted for using the viscosity of bulk PS.
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页数：4
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