Elucidation of novel nanostructures by time-lapse monitoring of polystyrene-block-polyvinylpyridine under chemical treatment

Langmuir : the ACS Journal of Surfaces and Colloids
Sheng SongJong-In Hahm

Abstract

Nanoscale micellar structures of polystyrene-block-polyvinylpyridine (PS-b-PVP) diblock copolymers have proven their effectiveness in lithography and biological detection by serving as a choice material to produce nanoscale guides and delivery systems in a straightforward and rapid manner through self-assembly. Such applications can greatly benefit from having high versatility for the selection of template sizes (pattern repeat spacing) and shapes (pattern geometry), especially when reaching a size regime that conventional top-down fabrication techniques may not readily be able to provide desired feature dimensions. Selective chemical treatments of the diblock copolymers are one of the useful methods yielding a rich set of nanoscale features on PS-b-PVP. Exposure to selective vapor can induce reorganization of the polymeric chains of PS-b-PVP and alter the original micellar nanostructures. In this Article, we identify for the first time a host of new nanostructures formed at different stages of chloroform vapor annealing by performing time-lapse atomic force microscopy measurements. We determine key, time-dependent, topological parameters defining each nanostructure and present the likely scenario of polymeric chain reorganizat...Continue Reading

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Jan 30, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Nitin KumarJong-in Hahm
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Citations

Dec 2, 2017·Advanced Healthcare Materials·Izabela Firkowska-BodenKlaus D Jandt
Jan 25, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Jong-in Hahm

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