NDLI: Vertically aligned cadmium chalcogenide nanowire arrays on muscovite mica: a demonstration of epitaxial growth strategy.

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Vertically aligned cadmium chalcogenide nanowire arrays on muscovite mica: a demonstration of epitaxial growth strategy.

Content Provider	Semantic Scholar
Author	Utama, M. Iqbal Bakti Peng, Zeping Chen, Rui Peng, Bo Xu, Xinlong Dong, Yajie Wong, Lai Mun Wang, Shuai Sun, Handong Xiong, Qihua
Copyright Year	2011
Abstract	We report a strategy for achieving epitaxial, vertically aligned cadmium chalcogenide (CdS, CdSe, and CdTe) nanowire arrays utilizing van der Waals epitaxy with (001) muscovite mica substrate. The nanowires, grown from a vapor transport process, exhibited diameter uniformity throughout their length, sharp interface to the substrate, and positive correlation between diameter and length with preferential growth direction of [0001] for the monocrystalline wurtzite CdS and CdSe nanowires, but of [111] for zinc blende CdTe nanowires, which also featured abundant twinning boundaries. Self-catalytic vapor-liquid-solid mechanism with hydrogen-assisted thermal evaporation is proposed to intepret the observations. Optical absorption from the as-grown CdSe nanowire arrays on mica at 10 K revealed intense first-order exciton absorption and its longitudinal optical phonon replica. A small Stokes shift (∼1.3 meV) was identified, suggesting the high quality of the nanowires. This study demonstrated the generality of van der Waals epitaxy for the growth of nanowire arrays and their potential applications in optical and energy related devices.
File Format	PDF HTM / HTML
DOI	10.1021/nl1034495
PubMed reference number	21043505
Journal	Medline
Volume Number	11
Issue Number	8
Alternate Webpage(s)	http://www1.spms.ntu.edu.sg/~qihuagroup/data/Xiong/Papers/nl1034495%20-%20CdE%20vdWE%20-%20Iqbal.pdf
Alternate Webpage(s)	https://doi.org/10.1021/nl1034495
Journal	Nano letters
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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