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Title: Time evolution studies of laser induced chemical changes in InAs nanowire using Raman spectroscopy

We report the study of time evolution of chemical changes on the surface of an InAs nanowire (NW) on laser irradiation in different power density regime, using Raman spectroscopy for a time span of 8–16 min. Mixture of metastable oxides like InAsO{sub 4,} As{sub 2}O{sub 3} are formed upon oxidation, which are reflected as sharp Raman peaks at ∼240–254 and 180–200 cm{sup −1}. Evidence of removal of arsenic layer by layer is also observed at higher power density. Position controlled laser induced chemical modification on a nanometer scale, without changing the core of the NW, can be useful for NW based device fabrication.
Authors:
; ; ;  [1]
  1. Laser Physics Application Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, MP (India)
Publication Date:
OSTI Identifier:
22304471
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; ARSENIC OXIDES; FABRICATION; INDIUM ARSENIDES; LASER RADIATION; LASERS; LAYERS; MODIFICATIONS; NANOWIRES; OXIDATION; POWER DENSITY; RAMAN SPECTROSCOPY; SURFACES