SURPRISING MORPHOLOGICAL EVOLUTION OF SUPPORTED PMMATHIN FILMS IN WATER
The stability of ultra-thin polymer film has been attracting continuous attention for decades because of the popular application of these systems in coating technology, microelectronic industries, biomedical devices, as well as the emerging nanotechnology. Frequently, these films are found to be unstable because of the mismatch of physical properties of substrates and polymer films, such as wettability, thermo-expansion rate, Poisson ratio, etc. In many cases, the supported ultra-thin polymer films can undergo morphological variations under external stimuli, such as stress, heat, light radiation and solvent, etc. Such instabilities may be exhibited in various forms, such as buckling, wrinkle1-4 and dewetting5. Recently, there have been quite amount of attention paid to the behavior of the thin film of poly(methyl methacrylate) (PMMA) in water because of its biomedical applications6,7, and a surprising phenomenon was discovered as PMMA ultrathin film can be partially swelled by its nonsolvent, water8. In this work, we adopted various microscopic techniques to study the morphological change of thin films of PMMA in water. The in-situ measurement of the films change was conducted by Total Internal Reflection Fluorescence Microscope (TIRF), Optical Microscopy (OM) and Atomic Force Microscopy (AFM).
Benxin Jing Jiang Zhao
Joint Laboratory of Polymer Sciences and Materials,State Key Laboratory of Polymer Physics and Chemistry,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190
国际会议
International Symposium on Polymer Physics(2008年国际高分子物理学术会议PP2008)
厦门
英文
158-159
2008-06-08（万方平台首次上网日期，不代表论文的发表时间）