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Nano-scale study of microstructure of Eu(DBM)3phen-doped poly(methyl methacrylate) by near-field scanning microscopy and optical properties

Published online by Cambridge University Press:  03 March 2011

Hao Liang ,
Xiaohong Sun ,
Qijin Zhang ,
Hai Ming ,
Jianhua Cao ,
Zengchang Li ,
Biao Chen ,
Jie Xu  and
Hui Zhao
Hao Liang
Affiliation:
Structure Research Laboratory and Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
Xiaohong Sun
Affiliation:
Department of Physics, University of Science and Technology of China, Hefei,Anhui 230026, People’s Republic of China
Qijin Zhang*
Affiliation:
Structure Research Laboratory and Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, People’s Republic of China
Hai Ming
Affiliation:
Department of Physics, University of Science and Technology of China, Hefei,Anhui 230026, People’s Republic of China
Jianhua Cao
Affiliation:
School of Mechatronic Engineering, Beijing Institute of Technology,Beijing, 100081, People’s Republic of China
Zengchang Li
Affiliation:
Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
Biao Chen
Affiliation:
Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
Jie Xu
Affiliation:
Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
Hui Zhao
Affiliation:
Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
*
a) Address all correspondence to this author. e-mail: zqjm@ustc.edu.cn
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Abstract

Eu(DBM)3phen-doped poly(methyl methacryate) (PMMA) with different doping concentration were prepared. The highest doping concentration sample (10000 ppm) was examined by near-field scanning optical microscopy (NSOM) with a resolution of 50 nm; and the result showed that there were no aggregates larger than 50 nm in the doped polymer. This result was further confirmed by optical properties of the doping material. Concentration quenching was not detected by metastable-state lifetime measurements, indicating that no aggregates existed. According to the fluorescence spectra analysis, the relative intensity ratio (R) of 5D0→7F2 to 5D0→7F1 transition was not shown to be significantly changed with the increasing of Eu3+ content. The analysis reflected that the local structure and asymmetry in the vicinity of europium ions were not changed, and that the Eu3+ ions in PMMA were homogeneously dispersed.

Keywords

PolymerMicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 8 , August 2004 , pp. 2256 - 2261
Copyright
Copyright © Materials Research Society 2004

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