Evolution of InAs branches in InAs∕GaAs nanowire heterostructures | Zendy

Mohanchand Paladugu | Zendy; Jin Zou | Zendy; Graeme Auchterlonie | Zendy; Yanan Guo | Zendy; Y. Kim | Zendy; Hannah J. Joyce | Zendy; Qian Gao | Zendy; Hark Hoe Tan | Zendy; C. Jagadish | Zendy

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Evolution of InAs branches in InAs∕GaAs nanowire heterostructures

Author(s) -

Mohanchand Paladugu,

Jin Zou,

Graeme Auchterlonie,

Yanan Guo,

Y. Kim,

Hannah J. Joyce,

Qian Gao,

Hark Hoe Tan,

C. Jagadish

Publication year - 2007

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.2790486

Subject(s) - nanowire , heterojunction , materials science , transmission electron microscopy , nanoparticle , gallium arsenide , indium arsenide , nanotechnology , optoelectronics , electron microscope , optics , physics

Branched nanowire heterostructures of InAsGaAs were observed during Au-assisted growth of InAs on GaAs nanowires. The evolution of these branches has been determined through detailed electron microscopy characterization with the following sequence: (1) in the initial stage of InAs growth, the Au droplet is observed to slide down the side of the GaAs nanowire, (2) the downward movement of Au nanoparticle later terminates when the nanoparticle encounters InAs growing radially on the GaAs nanowire sidewalls, and (3) with further supply of In and As vapor reactants, the Au nanoparticles assist the formation of InAs branches with a well-defined orientation relationship with GaAsInAs core/shell stems. We anticipate that these observations advance the understanding of the kink formation in axial nanowire heterostructures. © 2007 American Institute of Physics

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