Composition and Phase Tuned InGaAs Alloy Nanowires
- Authors
- Jung, Chan Su; Kim, Han Sung; Jung, Gyeong Bok; Gong, Kang Jun; Cho, Yong Jae; Jang, So Young; Kim, Chang Hyun; Lee, Chi-Woo; Park, Jeunghee
- Issue Date
- 28-Apr-2011
- Publisher
- AMER CHEMICAL SOC
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY C, v.115, no.16, pp 7843 - 7850
- Pages
- 8
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- JOURNAL OF PHYSICAL CHEMISTRY C
- Volume
- 115
- Number
- 16
- Start Page
- 7843
- End Page
- 7850
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/112625
- DOI
- 10.1021/jp2003276
- ISSN
- 1932-7447
1932-7455
- Abstract
- In(x)Ga(1-x)As (0 <= x <= 1) alloy nanowires (average diameter = 50 nm) were synthesized at 800 degrees C with complete composition tuning by the thermal evaporation of GaAs/InAs powders. X-ray diffraction and Raman spectroscopy confirmed the complete composition tuning over the whole range. They exhibit exclusively a superlattice structure composed of zinc blende phase twinned octahedral slice segments having alternating orientations along the axial [111] direction and wurtzite phase twin planes. When the mole fraction (x) approaches 0.5, the period of the twinned superlattice structures becomes shorter; showing a controlled wurtzite-zinc blende polytypism. At x = 0.5, the wurtzite phase is dominant with the shortest superlattice periodicity (similar to 2 nm). The smaller diameter consistently induces shorter periodic superlattice structures. This unique polytypism shows that the incorporation of In (or Go) and the smaller diameter promotes the crystallization of the nanowires in the wurtzite phase. These In(x)Ga(1-x)As nanowires produce an efficient THz emission, showing minimized carrier mobility at x = 0.5, where the superlattice stacking faults are maximized.
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Collections - Graduate School > Department of Advanced Materials Chemistry > 1. Journal Articles
- College of Science and Technology > ETC > 1. Journal Articles
- College of Science and Technology > Department of Advanced Materials Chemistry > 1. Journal Articles

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