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Synthesis and Patterning of Gold Nanostructures on InP and GaAs via Galvanic Displacement
Author(s) -
Hormozi Nezhad Mohammad R.,
Aizawa Masato,
Porter Lon A.,
Ribbe Alexander E.,
Buriak Jillian M.
Publication year - 2005
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.200500121
Subject(s) - galvanic cell , nanostructure , nanotechnology , materials science , single displacement reaction , semiconductor , displacement (psychology) , nanoparticle , colloidal gold , oxide , optoelectronics , chemistry , metallurgy , inorganic chemistry , psychology , psychotherapist
Plugging into III–Vs : Crystalline, sub‐100 nm gold nanoparticles are formed via simple galvanic displacement reactions on InP and GaAs surfaces (see images). The reactions require only four ingredients (gold salt, semiconductor, water, and dilute acid) and result in firmly bound gold nanoparticle arrays on the surface. The chemistry can be patterned via AFM‐tip‐mediated scribing of the sub‐5‐nm‐thick surface oxide to reveal the underlying semiconductor, leading to galvanic displacement only in the exposed areas.