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Search Publications by: Guangcui Yuan (Fed)

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Displaying 26 - 45 of 45

Film Confinement Induced "Jump-Percolation" Wetting Transition in Amphiphilic Block Copolymer Films

October 1, 2017
Author(s)
Namrata Salunke, Asritha Nallapaneni, Guangcui Yuan, Christopher Stafford, Hui Niu, Matthew D. Shawkey, R. A. Weiss, Alamgir Karim
A sharp surface wettability transition with varying film thickness dependent morphology was observed in cast films of an amphiphilic triblock copolymer comprised of poly(2-(N-ethylperfluotooctanesulfonamido) ethyl methylacrylate), poly(FOSM), and poly(N,N'

Modifying Surface Fluctuations of Polymer Melt Films with Substrate Modification

September 1, 2017
Author(s)
Yang Zhou, Qiming He, Fan Zhang, Feipeng Yang, Suresh Narayanan, Guangcui Yuan, Ali Dhinojwala, Mark D. Foster
Deposition of a plasma polymerized film on a silicon substrate changes the fluctuations on the surface of a sufficiently thin, melt polystyrene (PS) film atop the substrate. Surface fluctuation relaxation times measured with X-ray photon correlation

Structural Analysis of Dendrimers Based on Polyhedral Oligomeric Silsesquioxane and their Assemblies in Solution by Small-Angle Neutron Scattering: Fits to a Modified Two Correlation Lengths Model

December 1, 2016
Author(s)
Guangcui Yuan, Xing Wang, Decheng Wu, Boualem Hammouda
The small-angle neutron scattering (SANS) technique has been used to investigate the structure of dendrimers based on polyhedral oligomeric silsequioxane (POSS). Three generations and two distinct terminal groups (either vinyl or polyethylene glycol (PEG)

Reduction of Domain Spacing and Interfacial Width in Fast Ordering Nanofilled Copolymer Films by Direct Immersion Annealing

November 10, 2016
Author(s)
Melanie Longanecker, Arvind Modi, Andrey Dobrynin, Seyong Kim, Guangcui Yuan, Ronald L. Jones, Sushil K. Satija, Joona Bang, Alamgir Karim
Block copolymers (BCPs) offer a convenient templating method on the nanoscale to organize nanoparticles within a polymer film for the enhancement of various properties. For functional applications that require high nanoparticle loadings, this is often more

Structure of Polyelectrolyte Brushes in the Presence of Multivalent Counterions

August 9, 2016
Author(s)
Jing Yu, Jun Mao, Guangcui Yuan, Sushil K. Satija, Zhang Jiang, Wei Chen, Matthew Tirrell
Polyelectrolyte brushes are of great importance to a wide range of fields, ranging from colloidal stabilization to responsive and tunable materials to lubrication. We synthesized high-density polystyrene sulfonate (PSS) brushes using surface force