Domain memory of mixed polymer brushes

Langmuir : the ACS Journal of Surfaces and Colloids
Svetlana SanterJürgen Rühe

Abstract

The nano-phase-separation in mixed polymer brushes consisting of polystyrene and poly(methyl methacrylate) (PS-PMMA) chains attached to a silicon surface is studied. The topographies of the mixed brushes are examined after they have been exposed to solvents which induce or erase nano-phase-separation. It is discussed whether the brush locally forms the same pattern every time the transition from the smooth and featureless to the nanopatterned state occurs ("domain memory") or if the local assembly of the domains emerges in a different arrangement after each cycle of topography switching. A memory measure parameter is introduced, which characterizes quantitatively the domain memory effect in the nanopattern. It is shown that at constant grafting density but with increasing molecular weight of the brush chains the memory measure parameter decreases. In contrast to this, brushes with constant molecular weight, but differing in grafting density, all have a similar domain memory. We discuss a possible origin of the domain memory effect in the mixed brush systems studied and point out its impact on the motion of nanoparticles adsorbed on top of such systems.

References

Jan 22, 2002·Physical Review Letters·S MinkoM Stamm
Nov 3, 2004·Langmuir : the ACS Journal of Surfaces and Colloids·Melburne C LemieuxVladimir V Tsukruk
Jun 23, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·John DraperManfred Stamm

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Citations

Apr 26, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Nicel C Estillore, Rigoberto C Advincula
May 20, 2011·Physical Chemistry Chemical Physics : PCCP·M FilimonM Havenith
Jan 23, 2010·Nature Materials·Martien A Cohen StuartSergiy Minko
Oct 18, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Alexey KopyshevSvetlana Santer
Dec 6, 2016·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Sarah LoebnerSvetlana Santer
Aug 23, 2018·Soft Matter·Inge BosJens-Uwe Sommer
Oct 8, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Jiafang Wang, Marcus Müller
Dec 28, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Svetlana SanterMarcus Müller
Jun 13, 2021·Advances in Colloid and Interface Science·Simon SchubotzGünter K Auernhammer

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