Influence of substrate orientation on the structural properties of GaAs nanowires in MOCVD

Journal Article · Tue Apr 19 00:00:00 EDT 2016 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4945503· OSTI ID:22591149

Muhammad, R., E-mail: [e-mail]; Othaman, Z., E-mail: [e-mail]; Ibrahim, Z., E-mail: [e-mail]; Sakrani, S., E-mail: [e-mail] ^[1]; Wahab, Y., E-mail: [e-mail] ^[2]

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1. Faculty of Science, UniversitiTeknologi Malaysia, 81310 UTM, Johor (Malaysia)
2. Razak School, UniversitiTeknologi Malaysia, 54100 Kuala Lumpur (Malaysia)

In this study, the effect of substrate orientation on the structural properties of GaAs nanowires grown by a metal organic chemical vapor deposition has been investigated. Gold colloids were used as catalyst to initiate the growth of nanowiresby the vapour-liquid-solid (VLS) mechanism. From the field-emission scanning electron microscopy (FE-SEM), the growth of the nanowires were at an elevation angle of 90°, 60°, 65° and 35° with respect to the GaAs substrate for (111)B, (311)B, (110) and (100) orientations respectively. The preferential NW growth direction is always <111>B. High-resolution transmission electron microscope (HRTEM) micrograph showed the NWs that grew on the GaAs(111)B has more structural defects when compared to others. Energy dispersive X-ray analysis (EDX) indicated the presence of Au, Ga and As. The bigger diameter NWs dominates the (111)B substrate surface.

• OSTI ID: 22591149
• Journal Information: AIP Conference Proceedings, Vol. 1725, Issue 1; Conference: ICAMST 2015: 3. international conference on advanced materials science and technology, Semarang (Indonesia), 6-7 Oct 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CATALYSTS
CHEMICAL VAPOR DEPOSITION
COLLOIDS
COMPARATIVE EVALUATIONS
CRYSTAL GROWTH
CRYSTAL STRUCTURE
FIELD EMISSION
GALLIUM ARSENIDES
GOLD
LIQUIDS
NANOWIRES
ORGANOMETALLIC COMPOUNDS
SCANNING ELECTRON MICROSCOPY
SOLIDS
SUBSTRATES
SURFACES
TRANSMISSION ELECTRON MICROSCOPY
X-RAY SPECTROSCOPY