NDLI: Ultrathin InAs nanowire growth by spontaneous Au nanoparticle spreading on indium-rich surfaces

Content Provider	Royal Society of Chemistry (RSC)
Author	Jung, Kyooho Li, Xiuling Mohseni, Parsian K.
Copyright Year	2014
Abstract	Ultrathin InAs nanowires (NWs) can enable true one-dimensional electronics. We report a growth phenomenon where a bimodal size distribution (∼α nm and ∼5 nm in diameter) of InAs NWs can be achieved from gold (Au) nanoparticles of a single size, α (α = 50–250 nm). We determine that ultrathin InAs NW growth is seeded by ultra-small Au nanoparticles shed from the large Au seeds upon indium (In) introduction into the growth system and formed prior to the supersaturation of In in Au. The Au spreading phenomenon is explained by the balancing of Gibbs free energy lowering from In–Au mixing and the surface tension increase. Ultrathin InAs NWs formed in this way exhibit a perfect wurtzite structure with no stacking faults. We have observed InAs NWs with diameters down to ∼2 nm using our growth method. Passivating the ultrathin InAs NWs with an AlAs shell, subsequently oxidized in air, results in physical deformation of the InAs core, demonstrating the mechanical pliability of these ultrathin NWs.
Starting Page	15293
Ending Page	15300
Page Count	8
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	6
Issue Number	24
Journal	Nanoscale
DOI	10.1039/c4nr04670f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Gibbs free energy Wurtzite Gibbs Supersaturation Surface tension Indium
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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