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Choi, Kyoung Jin
Energy Conversion Materials (EcoMAT) Lab
Research Interests
  • Solar cells, thermoelectrics, piezoelectric

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Morphological Evolution of CdS Nanowires to Nanosheets

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Title
Morphological Evolution of CdS Nanowires to Nanosheets
Author
Choi, Young-JinChoi, Kyoung JinKim, Dong-WanPark, Jae-Gwan
Keywords
Growth mechanism;  Nanosheet;  Nanowire;  Vapor-liquid-solid;  Vapor-solid
Issue Date
2009-07
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.9, no.7, pp.4487 - 4491
Abstract
We report on the formation mechanism of CdS nanosheets based upon extensive scanning electron microscopy and transmission electron microscopy experiments. Two different CdS nanowires were synthesized, whose axial directions are in parallel with [00011 or [0 (1) over bar 10]. The [0001]-nanowires sustained one-dimensional growth characteristics irrespective of reaction temperature and duration. On the other hand, we observed two-dimensional lateral growth in the [0 (1) over bar 10]-nanowires. We proposed a three-step process for the morphological evolution of CdS nanowires to nanosheets; (1) nucleation and growth of nanowires by vapor-liquid-solid mechanism, (2) side-branching of secondary nanowires perpendicular to the original nanowires and filling between them by vapor-solid mechanism, and finally (3) formation of nanosheets through the repetition of side-branching and filling processes.
URI
https://scholarworks.unist.ac.kr/handle/201301/7611
DOI
10.1166/jnn.2009.M81
ISSN
1533-4880
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