Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/86940
Title: Nonlinear optical behavior of transparent nanohybrids of nanocrystalline TiO 2 in poly(methyl methacrylate) prepared by in situ sol-gel polymerization technique
Authors: Yuwono, A.M. 
Xue, J.M. 
Wang, J. 
Elim, H.I. 
Ji, W. 
Li, Y.
White, T.J.
Keywords: Nanohybrid of TiO 2-PMMA
Nonlinear Optical Behavior
Ultrafast Electronic Nonlinearity
Issue Date: 2005
Source: Yuwono, A.M.,Xue, J.M.,Wang, J.,Elim, H.I.,Ji, W.,Li, Y.,White, T.J. (2005). Nonlinear optical behavior of transparent nanohybrids of nanocrystalline TiO 2 in poly(methyl methacrylate) prepared by in situ sol-gel polymerization technique. Journal of Metastable and Nanocrystalline Materials 23 : 367-370. ScholarBank@NUS Repository.
Abstract: Nanohybrid thin films consisting of nanocrystalline TiO 2 particles in poly(methyl methacrylate) (PMMA) were successfully synthesized by in-situ sol-gel and polymerization assisted by spin coating. Using titanium isoproproxide (Ti-iP), methyl methacrylate (MMA) and 3-(trimethoxysily) propyl methacrylate (MSMA) as the starting materials, nanohybrids containing up to 60% Ti-iP in PMMA were realized. The resulting nanohybrid thin films coated on quartz substrates are optically transparent and demonstrate nonlinear optical behaviour, where their nonlinear absorption increases with the loading of Ti-iP in PMMA, as confirmed by Z-scan measurements. Using pump-probe technique, these thin films are shown to exhibit an ultrafast relaxation time of ∼ 1.5 picosecond.
Source Title: Journal of Metastable and Nanocrystalline Materials
URI: http://scholarbank.nus.edu.sg/handle/10635/86940
ISSN: 14226375
Appears in Collections:Staff Publications

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