Optical Behaviour of ZnO/Au Nanojunctions

Author(s) Shital V. Kahane, Darshana Y. Inamdar, Shailaja Mahamuni
Affiliations Department of Physics, University of Pune, Ganeshkhind, 411007, Pune, India
Е-mail shailajamahamuni@yahoo.co.in
Issue Volume 3, Year 2011, Number 1, Part 3
Dates Received 04 February 2011, in final form 18 June 2011, published online 23 June
Citation Shital V. Kahane, Darshana Y. Inamdar, Shailaja Mahamuni, J. Nano- Electron. Phys. 3 No1, 563 (2011)
PACS Number(s) 79.60.Jv, 78.55.Et
Key words II-VI semiconductor (4) , Nanojunctions, Charge transfer mechanism, Photoluminescence (15) , UV-vis absorption (2) .
ZnO/Au nanojunctions were prepared by electrochemical method at room temperature. Nanojunction formation is vivid from appearance of ZnO and Au features in x-ray diffraction pattern. Optical absorption spectra reveal excitonic as well as surface plasmon resonance (SPR) feature in case of nanojunctions. Bleaching of the excitonic feature associated with the blue shift, is a signature of charge transfer from Au to ZnO at the interface of nanojunction. An increase in intensity of band edge luminescence and quenching of green emission indicates the passivation of surface defects due to formation of nanojunctions.