Kinetic control of self-catalyzed indium phosphide nanowires, nanocones, and nanopillars.
The morphological phase diagram is reported for InP nanostructures grown on InP (111)B as a function of temperature and V/III ratio. Indium droplets were used as the catalyst and were generated in situ in the metalorganic vapor-phase epitaxy reactor. Three distinct nanostructures were observed: wires, cones, and pillars. It is proposed that the shape depends on the relative rates of indium phosphide deposition via the vapor-liquid-solid (VLS) and vapor-phase epitaxy (VPE) processes. The rate of VLS is relatively insensitive to temperature and results in vertical wire growth starting at 350 degrees C. By contrast, the rate of VPE accelerates with temperature and drives the lateral growth of cones at 385 degrees C and then pillars at 400 degrees C.
Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, USA.
Robyn L
RL
Woo
Li
L
Gao
Niti
N
Goel
Mantu K
MK
Hudait
Kang L
KL
Wang
Suneel
S
Kodambaka
Robert F
RF
Hicks
D002384:Catalysis; D007204:Indium / Q000737:chemistry*; D007700:Kinetics; D049329:Nanostructures / Q000737:chemistry*; D053770:Nanowires / Q000737:chemistry*; D010720:Phosphines / Q000737:chemistry*; D012666:Semiconductors
D010720:Phosphines; D007204:Indium; C090882:indium phosphide