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Title: Surface Dynamics of Block Copolymer Films by X-ray Photon Correlation Spectroscopy

Abstract

We investigated the structure and dynamics of supported block copolymer films of poly(styrene)-b-poly(dimethylsiloxane)(PS-b-PDMS) in the spherical phase by x-ray photon correlation spectroscopy (XPCS) in grazing angle geometry. The temperature range studied was between 160 deg. and 210 deg. C, much higher than glass transition temperature (Tg), with thickness from 40 nm to 600 nm. Using x-ray reflectivity and x-ray photoelectron spectroscopy (XPS), we found that the PDMS-rich layer near the surface appeared at a temperature higher than Tg. Universal scaling of the dynamics, even with the bilayer model, was observed. From the fitting with the bilayer model, viscosities from both layers were obtained. The results from the surface dynamics are compared with the theory of overdamped thermal capillary waves on thin films.

Authors:
; ; ; ;  [1];  [2];  [2];  [3];  [4]
  1. Department of Physics and Interdisciplinary Program of Integrated Biotechnology, Sogang University, Seoul (Korea, Republic of)
  2. Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois (United States)
  3. Max Planck Institute for Metal Research, Stuttgart (Germany)
  4. Department of Physics, University of California San Diego, La Jolla, California (United States)
Publication Date:
OSTI Identifier:
21301142
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1119; Journal Issue: 1; Conference: 3. IUPAP international conference on women in physics, Seoul (Korea, Republic of), 8-10 Oct 2008; Other Information: DOI: 10.1063/1.3137883; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CAPILLARIES; COPOLYMERS; CORRELATIONS; LAYERS; POLYSTYRENE; REFLECTIVITY; SURFACES; TEMPERATURE DEPENDENCE; THIN FILMS; TRANSITION TEMPERATURE; VISCOSITY; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Song, Sanghoon, Cha, Wonsuk, Lee, Heeju, Li, Xiaolong, Kim, Hyunjung, Jiang, Zhang, Department of Physics, University of California San Diego, La Jolla, California, Narayanan, Suresh, Ruehm, Adrian, and Sinha, S K. Surface Dynamics of Block Copolymer Films by X-ray Photon Correlation Spectroscopy. United States: N. p., 2009. Web. doi:10.1063/1.3137883.
Song, Sanghoon, Cha, Wonsuk, Lee, Heeju, Li, Xiaolong, Kim, Hyunjung, Jiang, Zhang, Department of Physics, University of California San Diego, La Jolla, California, Narayanan, Suresh, Ruehm, Adrian, & Sinha, S K. Surface Dynamics of Block Copolymer Films by X-ray Photon Correlation Spectroscopy. United States. https://doi.org/10.1063/1.3137883
Song, Sanghoon, Cha, Wonsuk, Lee, Heeju, Li, Xiaolong, Kim, Hyunjung, Jiang, Zhang, Department of Physics, University of California San Diego, La Jolla, California, Narayanan, Suresh, Ruehm, Adrian, and Sinha, S K. 2009. "Surface Dynamics of Block Copolymer Films by X-ray Photon Correlation Spectroscopy". United States. https://doi.org/10.1063/1.3137883.
@article{osti_21301142,
title = {Surface Dynamics of Block Copolymer Films by X-ray Photon Correlation Spectroscopy},
author = {Song, Sanghoon and Cha, Wonsuk and Lee, Heeju and Li, Xiaolong and Kim, Hyunjung and Jiang, Zhang and Department of Physics, University of California San Diego, La Jolla, California and Narayanan, Suresh and Ruehm, Adrian and Sinha, S K},
abstractNote = {We investigated the structure and dynamics of supported block copolymer films of poly(styrene)-b-poly(dimethylsiloxane)(PS-b-PDMS) in the spherical phase by x-ray photon correlation spectroscopy (XPCS) in grazing angle geometry. The temperature range studied was between 160 deg. and 210 deg. C, much higher than glass transition temperature (Tg), with thickness from 40 nm to 600 nm. Using x-ray reflectivity and x-ray photoelectron spectroscopy (XPS), we found that the PDMS-rich layer near the surface appeared at a temperature higher than Tg. Universal scaling of the dynamics, even with the bilayer model, was observed. From the fitting with the bilayer model, viscosities from both layers were obtained. The results from the surface dynamics are compared with the theory of overdamped thermal capillary waves on thin films.},
doi = {10.1063/1.3137883},
url = {https://www.osti.gov/biblio/21301142}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1119,
place = {United States},
year = {Sun Apr 19 00:00:00 EDT 2009},
month = {Sun Apr 19 00:00:00 EDT 2009}
}