Self-catalyzed epitaxial growth of vertical indium phosphide nanowires on silicon.
Vertical indium phosphide nanowires have been grown epitaxially on silicon (111) by metalorganic vapor-phase epitaxy. Liquid indium droplets were formed in situ and used to catalyze deposition. For growth at 350 degrees C, about 70% of the wires were vertical, while the remaining ones were distributed in the 3 other <111> directions. The vertical fraction, growth rate, and tapering of the wires increased with temperature and V/III ratio. At 370 degrees C and V/III equal to 200, 100% of the wires were vertical with a density of approximately 1.0 x 10(9) cm(-2) and average dimensions of 3.9 mum in length, 45 nm in base width, and 15 nm in tip width. X-ray diffraction and transmission electron microscopy revealed that the wires were single-crystal zinc blende, although they contained a high density of rotational twins perpendicular to the <111> growth direction. The room temperature photoluminescence spectrum exhibited one peak centered at 912 +/- 10 nm with a FWHM of approximately 60 nm.
Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095, USA.
Li
L
Gao
Robyn L
RL
Woo
Baolai
B
Liang
Marta
M
Pozuelo
Sergey
S
Prikhodko
Mike
M
Jackson
Niti
N
Goel
Mantu K
MK
Hudait
Diana L
DL
Huffaker
Mark S
MS
Goorsky
Suneel
S
Kodambaka
Robert F
RF
Hicks
D002384:Catalysis; D007204:Indium / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D053770:Nanowires / Q000737:chemistry* / Q000648:ultrastructure; D010720:Phosphines / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry*; D014961:X-Ray Diffraction
D010720:Phosphines; D007204:Indium; C090882:indium phosphide; D012825:Silicon