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Vianna SDB, Lin FY, Plum MA, et al. Dynamics of ultra-thin polystyrene with and without a (artificial) dead layer studied by resonance enhanced dynamic light scattering. J Chem Phys. 2017;146(20):203333doi: 10.1063/1.4983487.
Vianna, S. D. B., Lin, F. Y., Plum, M. A., Duran, H., & Steffen, W. (2017). Dynamics of ultra-thin polystyrene with and without a (artificial) dead layer studied by resonance enhanced dynamic light scattering. The Journal of chemical physics, 146(20), 203333. https://doi.org/10.1063/1.4983487
Vianna, S D B, et al. "Dynamics of ultra-thin polystyrene with and without a (artificial) dead layer studied by resonance enhanced dynamic light scattering." The Journal of chemical physics vol. 146,20 (2017): 203333. doi: https://doi.org/10.1063/1.4983487
Vianna SDB, Lin FY, Plum MA, Duran H, Steffen W. Dynamics of ultra-thin polystyrene with and without a (artificial) dead layer studied by resonance enhanced dynamic light scattering. J Chem Phys. 2017 May 28;146(20):203333. doi: 10.1063/1.4983487. PMID: 28571376; PMCID: PMC5435515.
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J Chem Phys. 2017 May 28;146(20):203333. doi: 10.1063/1.4983487.

Dynamics of ultra-thin polystyrene with and without a (artificial) dead layer studied by resonance enhanced dynamic light scattering.

The Journal of chemical physics

S D B Vianna, F Y Lin, M A Plum, H Duran, W Steffen

Affiliations

  1. Max Planck Institute for Polymer Research, P.O. Box 3148, 55128 Mainz, Germany.

PMID: 28571376 PMCID: PMC5435515 DOI: 10.1063/1.4983487

Abstract

Using non-invasive, marker-free resonance enhanced dynamic light scattering, the dynamics of capillary waves on ultrathin polystyrene films' coupling to the viscoelastic and mechanical properties have been studied. The dynamics of ultrathin polymer films is still debated. In particular the question of what influence either the solid substrate and/or the fluid-gas interface has on the dynamics and the mechanical properties of films of glass forming liquids as polymers is in the focus of the present research. As a consequence, e.g., viscosity close to interfaces and thus the average viscosity of very thin films are prone to change. This study is focused on atactic, non-entangled polystyrene thin films on the gold surface. A slow dynamic mode was observed with Vogel-Fulcher-Tammann temperature dependence, slowing down with decreasing film thickness. We tentatively attribute this relaxation mode to overdamped capillary waves because of its temperature dependence and the dispersion with a wave vector which was found. No signs of a more mobile layer at the air/polymer interface or of a "dead layer" at the solid/polymer interface were found. Therefore we investigated the influence of an artificially created dead layer on the capillary wave dynamics by introducing covalently bound polystyrene polymer brushes as anchors. The dynamics was slowed down to a degree more than expected from theoretical work on the increase of density close to the solid liquid interface-instead of a "dead layer" of 2 nm, the interaction seems to extend more than 10 nm into the polymer.

References

  1. Opt Express. 2009 Jun 8;17(12):10364-71 - PubMed
  2. J Phys Chem B. 2007 Aug 9;111(31):9197-9 - PubMed
  3. Science. 2010 Jun 25;328(5986):1676-9 - PubMed
  4. Phys Rev Lett. 2008 Aug 29;101(9):096101 - PubMed
  5. Phys Rev Lett. 2007 Jun 1;98(22):227801 - PubMed
  6. Phys Rev E Stat Nonlin Soft Matter Phys. 2005 Jun;71(6 Pt 1):061801 - PubMed
  7. Eur Phys J E Soft Matter. 2005 Oct;18(2):143-8 - PubMed
  8. Macromol Rapid Commun. 2015 Aug;36(15):1422-7 - PubMed
  9. Phys Rev Lett. 2003 Aug 22;91(8):085703 - PubMed
  10. Phys Rev Lett. 2000 Sep 11;85(11):2340-3 - PubMed
  11. J Chem Phys. 2014 Oct 28;141(16):161103 - PubMed
  12. Nat Mater. 2003 Oct;2(10):695-700 - PubMed
  13. J Chem Phys. 2014 Sep 14;141(10):104903 - PubMed
  14. Eur Phys J E Soft Matter. 2008 Dec;27(4):375-7 - PubMed
  15. Annu Rev Phys Chem. 2007;58:353-74 - PubMed
  16. Phys Rev Lett. 2003 Feb 14;90(6):068302 - PubMed
  17. Eur Phys J E Soft Matter. 2004 Dec;15(4):473-87 - PubMed
  18. Rev Sci Instrum. 2011 Jan;82(1):015102 - PubMed
  19. Science. 2008 Feb 1;319(5863):600-4 - PubMed
  20. Phys Rev Lett. 1996 Sep 2;77(10):2002-2005 - PubMed
  21. Phys Rev Lett. 2005 Jul 8;95(2):025701 - PubMed

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