Chao-Ching Chang^1,2, Chih-Shing Wang¹, Yu-Chen Chen¹ and Liao-Ping Cheng This email address is being protected from spambots. You need JavaScript enabled to view it.^1,2

¹Department of Chemical and Materials Engineering, Tamkang University, Tamsui, Taiwan 251, R.O.C.
²Energy and Opto-Electronic Materials Research Center, Tamkang University, Tamsui, Taiwan 251, R.O.C.

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