Kinetic control of self-catalyzed indium phosphide nanowires, nanocones, and nanopillars

Robyn L Woo; Li Gao; Niti Goel; Mantu K Hudait; Kang L Wang; Suneel Kodambaka; Robert F Hicks

doi:10.1021/nl803584u

Kinetic control of self-catalyzed indium phosphide nanowires, nanocones, and nanopillars

Nano Lett. 2009 Jun;9(6):2207-11. doi: 10.1021/nl803584u.

Authors

Robyn L Woo¹, Li Gao, Niti Goel, Mantu K Hudait, Kang L Wang, Suneel Kodambaka, Robert F Hicks

Affiliation

¹ Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, USA.

PMID: 19419156
DOI: 10.1021/nl803584u

Abstract

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.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Catalysis
Indium / chemistry*
Kinetics
Nanostructures / chemistry*
Nanowires / chemistry*
Phosphines / chemistry*
Semiconductors*

Substances

Phosphines
Indium
indium phosphide