Surface dynamics of glasses

H Tian, Q Xu, H Zhang, RD Priestley, B Zuo - Applied Physics Reviews, 2022 - pubs.aip.org
Two challenging scientific disciplines, ie, the physics of glasses [Anderson, Science 267,
1615 (1995); Kennedy and Norman, Science 309, 75 (2005)] and interface chemistry …

The role of the molecular weight of the adsorbed layer on a substrate in the suppressed dynamics of supported thin polystyrene films

W Ren, X Wang, J Shi, J Xu, H Taneda, NL Yamada… - Soft Matter, 2022 - pubs.rsc.org
The adsorbed layer on a solid surface plays a crucial role in the dynamics of
nanoconfinement polymer materials. However, the influence of the adsorbed layer is …

Strain rate and thickness dependences of elastic modulus of free-standing polymer nanometer films

PM Yiu, H Yuan, Q Gu, P Gao, OKC Tsui - ACS Macro Letters, 2020 - ACS Publications
Elastic moduli, E, of free-standing polystyrene (PS) single-layers and polystyrene–
polydimethylsiloxane (PS-PDMS) bilayers are measured by uniaxial tensile testing at room …

Glass transition of the surface monolayer of polystyrene films: Effect of thermal preannealing

J Yan, Z Ma, J Xu, H Nie, H Yuan, X Wang… - …, 2023 - ACS Publications
In a previous experiment, we observed that the glass transition temperature of the surface
monolayer glass transition temperature (T gsurf) of unannealed polystyrene (PS) films spin …

Recent Advancements in Experimental Methods for Investigating Irreversible Chain Adsorption at Polymer-Solid Interfaces

Y Wu, Q Wang, H Sun, S Wang, Z Han, J Chen, Z Wu… - Polymer, 2024 - Elsevier
Polymer-solid interfaces are crucial in determining the properties and performance of a
diverse array of materials, ranging from polymer-based thin film devices to polymer …

Exploring the Molecular Origin for the Long-Range Propagation of the Substrate Effect in Unentangled Poly (methyl methacrylate) Films

J Xu, X Guo, H Guo, Y Zhang, X Wang - Polymers, 2023 - mdpi.com
The polymer/substrate interface plays a significant role in the dynamics of nanoconfined
polymers because of its suppression on polymer mobility and its long-range propagation …

Influence of the interfacial effect on polymer thin-film dynamics scaled by the distance of chain mobility suppression by the substrate

B Zuo, F Wang, Z Hao, H He, S Zhang… - …, 2019 - ACS Publications
Polymer–substrate interfaces are significant in determining the dynamics of nanoconfined
polymers. In this study, an improved understanding of the interfacial effect was gained from …

Thickness Dependence of Surface Chain Conformation in Poly (methyl methacrylate) Films Investigated by Sum Frequency Generation Vibrational Spectroscopy

J Xu, S Bao, Z Jiang, B Li, X Han, X Wang - Macromolecules, 2024 - ACS Publications
To explore the substrate effect on chain conformation, sum frequency generation vibrational
spectroscopy was used to investigate the variation in the surface structure of a supported …

Effective viscosity of unentangled random copolymer films of styrene and 4-methoxystyrene with different copolymer compositions

J Xu, C Lv, B Du, X Wang, OKC Tsui - Macromolecules, 2020 - ACS Publications
We show that the thickness, h 0, dependence of the effective viscosity, ηeff (h 0), of
unentangled random copolymer films of styrene (St) and 4-methoxystyrene (MeOS) …

Glass transition temperature of single-chain polystyrene particles end-grafted to oxide-coated silicon

Y Li, D Lin, J Xu, X Zhou, B Zuo, OKC Tsui… - The Journal of …, 2020 - pubs.aip.org
A method based on the PeakForce QNM atomic force microscopic (AFM) adhesion
measurement is employed to investigate the glassy dynamics of polystyrene (PS) single …