1
|
Chen F, Peng D, Ogata Y, Tanaka K, Yang Z, Fujii Y, Yamada NL, Lam CH, Tsui OKC. Confinement Effect on the Effective Viscosity of Plasticized Polymer Films. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01780] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- F. Chen
- Department
of Physics, Boston University, Boston, Massachusetts 02215, United States
| | - D. Peng
- Department
of Physics, Boston University, Boston, Massachusetts 02215, United States
| | - Y. Ogata
- Department
of Applied Chemistry, Kyushu University, Fukuoka 819-0395, Japan
| | - K. Tanaka
- Department
of Applied Chemistry, Kyushu University, Fukuoka 819-0395, Japan
| | - Z. Yang
- Department
of Polymer Science and Engineering, Soochow University, Suzhou, P. R. China
| | - Y. Fujii
- National Institute
for Materials Science, 1-1 Namiki, Tsukuba, Japan
| | - N. L. Yamada
- Neutron
Science Laboratory, High Energy Accelerator Research Organization, Ibaraki 305-0044, Japan
| | - C.-H. Lam
- Department
of Applied Physics, Hong Kong Polytechnic University, Hung Hom, Hong Kong
| | - O. K. C. Tsui
- Department
of Physics, Boston University, Boston, Massachusetts 02215, United States
- Division of Materials Science & Engineering, Boston University, Brookline, Massachusetts 02446, United States
| |
Collapse
|
2
|
Chen F, Clough A, Reinhard BM, Grinstaff MW, Jiang N, Koga T, Tsui OKC. Glass Transition Temperature of Polymer–Nanoparticle Composites: Effect of Polymer–Particle Interfacial Energy. Macromolecules 2013. [DOI: 10.1021/ma4000368] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- F. Chen
- Department
of Physics, Boston University, Boston,
Massachusetts 02215, United States
| | - A. Clough
- Department
of Physics, Boston University, Boston,
Massachusetts 02215, United States
| | - B. M. Reinhard
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
- Division of Materials Science & Engineering, Boston University, Boston, Massachusetts 02215, United States
| | - M. W. Grinstaff
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
- Division of Materials Science & Engineering, Boston University, Boston, Massachusetts 02215, United States
| | - N. Jiang
- Department of Materials Science & Engineering, Stony Brook University, Stony Brook, New York 11794-2275, United States
| | - T. Koga
- Department of Materials Science & Engineering, Stony Brook University, Stony Brook, New York 11794-2275, United States
- Depertment of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400,
United States
| | - O. K. C. Tsui
- Department
of Physics, Boston University, Boston,
Massachusetts 02215, United States
- Division of Materials Science & Engineering, Boston University, Boston, Massachusetts 02215, United States
| |
Collapse
|
3
|
Yang Z, Fujii Y, Lee FK, Lam CH, Tsui OKC. Glass Transition Dynamics and Surface Layer Mobility in Unentangled Polystyrene Films. Science 2010; 328:1676-9. [DOI: 10.1126/science.1184394] [Citation(s) in RCA: 399] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
|
4
|
Zhang X, Kong B, Tsui OKC, Yang X, Mi Y, Chan CM, Xu B. Effect of pattern topology on the self-cleaning properties of textured surfaces. J Chem Phys 2007; 127:014703. [PMID: 17627360 DOI: 10.1063/1.2748383] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The water contact angle and self-cleaning property of microfabricated surface textures possessing different topologies are compared. In one kind of surface textures, the protruded regions form a connected square network. In the other kind of surface textures, the protruded regions form a regular array of square posts. We find that the water apparent contact angle of the connected textures agrees with the Cassie equation [Discuss. Faraday Soc. 3, 11 (1948)], but that of the disconnected textures is much larger. Nevertheless, the disconnected textures exhibit inferior self-cleaning property, contrary to conventional conception. We discuss the possible reasons for these observations.
Collapse
Affiliation(s)
- Xueyun Zhang
- Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
| | | | | | | | | | | | | |
Collapse
|
5
|
Tsui OKC, Wang YJ, Zhao H, Du B. Some views about the controversial dewetting morphology of polystyrene films. Eur Phys J E Soft Matter 2003; 12:417-425. [PMID: 15007769 DOI: 10.1140/epje/e2004-00010-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Affiliation(s)
- O K C Tsui
- Department of Physics and Institute of Nano Science and Technology, University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
| | | | | | | |
Collapse
|
6
|
Abstract
The effect of C60 molecular rotation on the nanotribological properties of C60 single crystal surfaces has been studied by atomic/frictional force microscopy. The orientational order-disorder phase transition, in which the high temperature C60 free rotation is reduced to a low temperature hindered rotation, is shown to give rise to an abrupt change in friction and adhesion. This change in frictional force is quantitatively consistent with the observed change in adhesion. The similar slopes of the friction versus load curves in both phases indicate that the friction coefficient in the two phases remains about the same. Hence the C60 rotation does not provide an additional energy dissipation channel in the friction process.
Collapse
Affiliation(s)
- Qi Liang
- Department of Physics and Institute of Nano Science and Technology, The Hong Kong University of Science and Technology, Hong Kong, China
| | | | | | | | | |
Collapse
|
7
|
Affiliation(s)
- O. K. C. Tsui
- Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003
| | - T. P. Russell
- Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003
| | - C. J. Hawker
- IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120
| |
Collapse
|
8
|
Wang XP, Xiao X, Tsui OKC. Surface Viscoelasticity Studies of Ultrathin Polymer Films Using Atomic Force Microscopic Adhesion Measurements. Macromolecules 2001. [DOI: 10.1021/ma0018953] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- X. P. Wang
- Physics Department, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Xudong Xiao
- Physics Department, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - O. K. C. Tsui
- Physics Department, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| |
Collapse
|
9
|
Tsang OC, Xie F, Tsui OKC, Yang Z, Zhang J, Shen D, Yang X. Rubbing-induced molecular alignment and its relaxation in polystyrene thin films. ACTA ACUST UNITED AC 2001. [DOI: 10.1002/polb.10048] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
10
|
Tsui OKC, Wang XP, Ho JYL, Ng TK, Xiao X. Studying Surface Glass-to-Rubber Transition Using Atomic Force Microscopic Adhesion Measurements. Macromolecules 2000. [DOI: 10.1021/ma991473x] [Citation(s) in RCA: 93] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
11
|
Affiliation(s)
- P. Mansky
- Polymer Science and Engineering Department, Silvio O. Conte Center for Polymer Research, University of Massachusetts, Amherst, Massachusetts 01003
| | - O. K. C. Tsui
- Polymer Science and Engineering Department, Silvio O. Conte Center for Polymer Research, University of Massachusetts, Amherst, Massachusetts 01003
| | - T. P. Russell
- Polymer Science and Engineering Department, Silvio O. Conte Center for Polymer Research, University of Massachusetts, Amherst, Massachusetts 01003
| | - Y. Gallot
- Institut Charles Sadron, Strasbourg, France
| |
Collapse
|