Chain Conformation near the Buried Interface in Nanoparticle-Stabilized Polymer Thin Films

Barkley, Deborah A.; Jiang, Naisheng; Sen, Mani; Endoh, Maya K.; Rudick, Jonathan G.; Koga, Tadanori; Zhang, Yugang; Gang, Oleg; Yuan, Guangcui; Satija, Sushil K.; Kawaguchi, Daisuke; Tanaka, Keiji; Karim, Alamgir

doi:10.1021/acs.macromol.7b01187

Chain Conformation near the Buried Interface in Nanoparticle-Stabilized Polymer Thin Films

Journal Article · Tue Sep 26 00:00:00 EDT 2017 · Macromolecules

DOI:https://doi.org/10.1021/acs.macromol.7b01187· OSTI ID:1434769

Barkley, Deborah A. ^[1]; Jiang, Naisheng ^[1]; Sen, Mani ^[1]; Endoh, Maya K. ^[1]; ^[1]; ^[1]; Zhang, Yugang ^[2]; Gang, Oleg ^[3]; Yuan, Guangcui ^[4]; Satija, Sushil K. ^[4]; Kawaguchi, Daisuke ^[5]; ^[5]; ^[6]

Stony Brook Univ., Stony Brook, NY (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States); Columbia Univ., New York, NY (United States)
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
Kyushu Univ., Fukuoka (Japan)
The Univ. of Akron, Akron, OH (United States)

It is known that when nanoparticles are added to polymer thin films, they often migrate to the film-substrate interface and form an “immobile interfacial layer”, which has been believed as the origin of suppression of dewetting. We here report an alternative mechanism of dewetting suppression from the structural aspect of a polymer. Dodecane thiol-functionalized gold (Au) nanoparticles embedded in PS thin films prepared on Si substrates were used as a model. It was found that thermal annealing promotes irreversible polymer adsorption onto the substrate surface along with the surface migration of the nanoparticles. We also revealed that the surface migration causes additional nanoconfined space for the adsorbed polymer chains. As a result, the self-organization process of the strongly adsorbed polymer chains on the solid surface was so hindered that the chain conformations were randomized and expanded in the film normal direction. Here, the resultant chain conformation allows the interpenetration between free chains and the adsorbed chains, promoting adhesion and hence stabilizing the thin film.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0012704

OSTI ID:: 1434769

Report Number(s):: BNL--203495-2018-JAAM

Journal Information:: Macromolecules, Journal Name: Macromolecules Journal Issue: 19 Vol. 50; ISSN 0024-9297

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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