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Dye anchored ZnO nanoparticles: The positive and negative photoluminescence quenching effects

Authors
Ganesh, ThothadriKim, Jong HoonYoon, Seog JoonLee, SangjinLee, WonjooMane, Rajaram S.Han, Jin WookHan, Sung-Hwan
Issue Date
Oct-2009
Publisher
AIP Publishing
Citation
JOURNAL OF APPLIED PHYSICS, v.106, no.8, pp.1 - 5
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF APPLIED PHYSICS
Volume
106
Number
8
Start Page
1
End Page
5
URI
https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/176133
DOI
10.1063/1.3245398
ISSN
0021-8979
Abstract
The positive and negative photoluminescence quenching effects in dye [BCMoxo and BCtCM (curcumin-derived molecules)] anchored ZnO nanoparticles (NPs) are investigated using the optical and electronic properties. The photoluminescence, band gap (BCMoxo, 2.2 eV; BCtCM, 2.3 eV),and wettability studies confirm an optical quenching, well-matched electronic structure and relative hydrophobic nature, respectively, in the presence of dicarboxylic anchor groups (BCtCM) on ZnO NPs in contrast to that of keto groups (BCMoxo). Systematic change in UV-visible absorption band edge is noticeable for the BCtCM and BCMoxo-anchored ZnO NPs. The atomic absorption spectroscopy and inductively coupled-mass-spectroscopy analysis quantitatively verifies the amount of BCtCM dye molecules present on ZnO NPs surface area about three times higher than that of BCMoxo dye molecule without anchor groups.
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