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AuthorZhang, Ren
AuthorLee, Bongjoon
AuthorBockstaller, Michael R.
AuthorAl-Enizi, Abdullah M.
AuthorElzatahry, Ahmed
AuthorBerry, Brian C.
AuthorKarim, Alamgir
Available date2021-09-08T06:49:45Z
Publication Date2016
Publication NameFaraday Discussions
ResourceScopus
ISSN13596640
URIhttp://dx.doi.org/10.1039/c5fd00141b
URIhttp://hdl.handle.net/10576/22909
AbstractApplication of shear stress has been shown to unidirectionally orient the microstructures of block copolymers and polymer blends. In the present work, we study the phase separation of a novel nanoparticle (NP)-polymer blend thin film system under shear using a soft-shear dynamic zone annealing (DZA-SS) method. The nanoparticles are densely grafted with polymer chains of chemically dissimilar composition from the matrix polymer, which induces phase separation upon thermal annealing into concentrated nanoparticle domains. We systematically examine the influence of DZA-SS translation speed and thus the effective shear rate on nanoparticle domain elongation and compare this with the counterpart binary polymer blend behavior. Unidirectionally aligned nanoparticle string-domains are fabricated in the presence of soft-shear in confined thin film geometry. We expect this DZA-SS method to be applicable to various NP-polymer blends towards unidirectionally aligned nanoparticle structures, which are important to functional nanoparticle structure fabrication. The Royal Society of Chemistry 2016.
SponsorWe acknowledge the National Science Foundation via Grant NSF DMR-1411046 for support of this Cold Zone Annealing Soft-Shear study. MRB further acknowledges funding by the National Science Foundation via DMR-1410845. The authors extend their sincere appreciation to the Deanship of Scientific Research at King Saud University for its funding of the Prolific Research group (PRG-1436-14). We are grateful to Dr C. C. Han and Dr K. B. Migler for valuable discussions.
Languageen
PublisherRoyal Society of Chemistry
Subjectgold
nanoparticle
poly(methyl methacrylate)
polystyrene derivative
thiol derivative
chemistry
mechanical stress
phase transition
surface property
ultrastructure
Gold
Nanoparticles
Phase Transition
Polymethyl Methacrylate
Polystyrenes
Stress, Mechanical
Sulfhydryl Compounds
Surface Properties
TitleSoft-shear induced phase-separated nanoparticle string-structures in polymer thin films
TypeArticle
Pagination31-43
Volume Number186
dc.accessType Abstract Only


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