کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5442419 | 1510761 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Determination of photoisomerization parameters for a PMMA thin film doped with disperse orange 3
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
An analytic absorption function was derived to investigate the dynamics of photoisomerization in a poly(methyl methacrylate) thin film doped with disperse orange 3 (DO3). The temporal absorption measured using the pump-probe method was well-behaved, following an analytic function with a single exponential term. The isomerization and thermal-relaxation rates were evaluated by curve-fitting. The analytic absorption function was validated by measuring the thermal-relaxation rates with the pump separately on and off. Using this function, an analytic method for determining the photoisomerization parameters was demonstrated: for DO3 in poly(methyl methacrylate), the photoisomerization quantum yields for trans-cis and cis-trans processes were determined to be ÏTC=0.12±0.01 and ÏCT=0.77±0.06, respectively. The absorption cross section for the cis isomer was measured to be ÏC=(0.92±0.03)Ã10â16cm2. This analytic method can thus be used to characterize the dynamics of photoisomerization in dye doped thin films.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 73, November 2017, Pages 680-685
Journal: Optical Materials - Volume 73, November 2017, Pages 680-685
نویسندگان
Yang Wu, Jun Ho Cha, Hyun Kwan Shim, Hyo Jin Seo, Sun Il Kim,