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Strong Light-Matter Interaction in ZnO Nanowires
Strong Light-Matter Interaction in ZnO Nanowires
Bulletin of the Korean Chemical Society. 2014. Apr, 35(4): 1229-1232
Copyright © 2014, Korea Chemical Society
  • Received : December 13, 2013
  • Accepted : December 24, 2013
  • Published : April 20, 2014
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About the Authors
So Hyeong Sohn
Seulki Lee
Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju 660-701, Korea
Noh Soo Han
Yong Jin Park
Seung Min Park
Myong Yong Choi
Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju 660-701, Korea
Jae Kyu Song

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Experimental Sections
The details of ZnO nanowire synthesis and optical mea-surements have been reported elsewhere. 16,18 The sol-gel solutions of ZnO were prepared by dissolving zinc acetate dihydrate (Zn(CH 3 COO) 2 ·2H 2 O) in methanol and mixing with monoethanolamine at a volume ratio of 1:5. The seed layers were prepared by spin coating of sol-gel solutions onto silicon wafer substrates, where ZnO nanowires were grown by a chemical vapor transport method. The source mixture of Zn (1.0 g) and ZnO (1.0 g) was placed in an alumina boat and loaded inside a horizontal tube furnace. The seed film was placed 40 mm downstream of the source boat, where the temperature was 820 °C. The growth was carried out under flow of N 2 (140 sccm) and O 2 (5 sccm) for 10 min. The shapes and lengths of the nanostructures were characterized by scanning electron microscopy. The dia-meters of the nanowires were 200-250 nm and the lengths were in the range of 3-4 mm ( Figure 1(a) ). The nanowires were sonicated in methanol to isolate individual nanowires and drop coated onto silicon wafer substrates. An isolated single nanowire was selectively excited by 355 nm through an ultraviolet microscope objective. The normal photo-luminescence and lasing emissions were collected by the same objective, resolved spectrally by a monochromator, and detected by a photomultiplier.
Acknowledgements
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (NRF-2012R1A1A 2039882). This work was also supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST, NRF-2009-C1AAA001-0092939).
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