Effect of nanoscopic fillers on dewetting dynamics

J. H. Xavier, S. Sharma, Y. S. Seo, R. Isseroff, T. Koga, H. White, Abraham Ulman, K. Shin, S. K. Satija, J. Sokolov, M. H. Rafailovich

Research output: Contribution to journalArticle

Abstract

We synthesized C 18-functionalized gold and palladium nanoparticles with average diameter size of 10 and 3 nm, respectively, and carried out a systematic study of the effect of nanoscale metallic fillers on the dewetting dynamics of PS/PMMA bilayer substrates. Optical and atomic force microscopies were used to study the hole growth and determine the viscosity of the films as a function of PS molecular weight, particle radius, and concentration. Neutron reflectivity was used to measure the effects of the nanoparticles on the tracer diffusion coefficient. X-ray reflectivity and TEM microscopy were used to study the distribution of the particles within the film and ensure that no segregation or clustering occurred. The results indicated that the dynamics are a sensitive function of the ratio between the filler radius, R particle, and the polymer radius of gyration, R g. The data were found to collapse on a universal curve where the relative velocity of the filled system was faster than that for the unfilled system when R g/R particle > 4 and slower when R g/R particle < 4. Shear modulation force microscopy method (SMFM) measurements were performed as a function of temperature and indicated that T g was depressed by 12 °C relative to the bulk when R g/R panrticle > 4 and unchanged when R g/R particle < 4. The results were interpreted in terms of an increase in the local excluded volume and possible elastic distortions of the polymer matrix.

Original languageEnglish (US)
Pages (from-to)2972-2980
Number of pages9
JournalMacromolecules
Volume39
Issue number8
DOIs
StatePublished - Apr 18 2006

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Fillers
Nanoparticles
Palladium
Polymethyl Methacrylate
Polymer matrix
Gold
Atomic force microscopy
Microscopic examination
Polymers
Neutrons
Molecular weight
Viscosity
Transmission electron microscopy
X rays
Substrates

ASJC Scopus subject areas

  • Materials Chemistry

Cite this

Xavier, J. H., Sharma, S., Seo, Y. S., Isseroff, R., Koga, T., White, H., ... Rafailovich, M. H. (2006). Effect of nanoscopic fillers on dewetting dynamics. Macromolecules, 39(8), 2972-2980. https://doi.org/10.1021/ma050454m

Effect of nanoscopic fillers on dewetting dynamics. / Xavier, J. H.; Sharma, S.; Seo, Y. S.; Isseroff, R.; Koga, T.; White, H.; Ulman, Abraham; Shin, K.; Satija, S. K.; Sokolov, J.; Rafailovich, M. H.

In: Macromolecules, Vol. 39, No. 8, 18.04.2006, p. 2972-2980.

Research output: Contribution to journalArticle

Xavier, JH, Sharma, S, Seo, YS, Isseroff, R, Koga, T, White, H, Ulman, A, Shin, K, Satija, SK, Sokolov, J & Rafailovich, MH 2006, 'Effect of nanoscopic fillers on dewetting dynamics', Macromolecules, vol. 39, no. 8, pp. 2972-2980. https://doi.org/10.1021/ma050454m
Xavier JH, Sharma S, Seo YS, Isseroff R, Koga T, White H et al. Effect of nanoscopic fillers on dewetting dynamics. Macromolecules. 2006 Apr 18;39(8):2972-2980. https://doi.org/10.1021/ma050454m
Xavier, J. H. ; Sharma, S. ; Seo, Y. S. ; Isseroff, R. ; Koga, T. ; White, H. ; Ulman, Abraham ; Shin, K. ; Satija, S. K. ; Sokolov, J. ; Rafailovich, M. H. / Effect of nanoscopic fillers on dewetting dynamics. In: Macromolecules. 2006 ; Vol. 39, No. 8. pp. 2972-2980.
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