TY - JOUR
T1 - Effect of reactor pressure on catalyst composition and growth of GaSb nanowires
AU - Weng, Xiaojun
AU - Burke, Robert A.
AU - Dickey, Elizabeth C.
AU - Redwing, Joan M.
N1 - Funding Information:
This work was supported by the National Science Foundation under grant number ECS-0609282 and The Pennsylvania State University Materials Research Science and Engineering Center (MRSEC) on Nanoscale Science. Additional support was provided by Illuminex Corp. under an NSF Phase I STTR program ( 0740336 ). The TEM work was performed in the electron microscopy facility of the Materials Characterization Laboratory (MCL) at the Pennsylvania State University.
PY - 2010/2/1
Y1 - 2010/2/1
N2 - Au-assisted metalorganic chemical vapor deposition was employed for the synthesis of GaSb nanowires. X-ray energy dispersive spectrometry indicates that the composition of catalyst particles depends on the reactor pressure at constant growth temperature and V/III ratio. The catalyst particles were ternary Au-Ga-Sb alloys for nanowires grown at 100 and 200 Torr, suggesting a vapor-liquid-solid (VLS) nanowire growth mechanism. At 300 Torr, the catalyst particles were pure Ga and the self-catalytic VLS mechanism was responsible for the growth of the GaSb nanowires. The diameter and growth rate of the nanowires, as well as the contact angle between the catalyst particle and the nanowire, were found to be dependent on the composition of the catalyst particles.
AB - Au-assisted metalorganic chemical vapor deposition was employed for the synthesis of GaSb nanowires. X-ray energy dispersive spectrometry indicates that the composition of catalyst particles depends on the reactor pressure at constant growth temperature and V/III ratio. The catalyst particles were ternary Au-Ga-Sb alloys for nanowires grown at 100 and 200 Torr, suggesting a vapor-liquid-solid (VLS) nanowire growth mechanism. At 300 Torr, the catalyst particles were pure Ga and the self-catalytic VLS mechanism was responsible for the growth of the GaSb nanowires. The diameter and growth rate of the nanowires, as well as the contact angle between the catalyst particle and the nanowire, were found to be dependent on the composition of the catalyst particles.
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U2 - 10.1016/j.jcrysgro.2009.11.035
DO - 10.1016/j.jcrysgro.2009.11.035
M3 - Article
AN - SCOPUS:74549210209
SN - 0022-0248
VL - 312
SP - 514
EP - 519
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
IS - 4
ER -