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Title: Enhanced anomalous photo-absorption from TiO{sub 2} nanostructures

Two dimensional nanostructures have been created on the rutile TiO{sub 2} (110) surfaces via ion irradiation technique. Enhanced anomalous photo- absorption response is displayed, where nanostructures of 15 nm diameter with 0.5 nm height, and not the smaller nanostructures with larger surface area, delineate highest absorbance. Comprehensive investigations of oxygen vacancy states, on ion- irradiated surfaces, display a remarkable result that the number of vacancies saturates for higher fluences. A competition between the number of vacancy sites on the nanostructure in conjunction with its size is responsible for the observed anomalous photo-absorption.
Authors:
; ; ;  [1] ;  [2] ;  [3] ;  [4]
  1. Institute of Physics, Bhubaneswar 751005 (India)
  2. Utkal University, Bhubaneswar 751004 (India)
  3. Department of Physics and Astrophysics, University of Delhi, Delhi 110007 (India)
  4. Inter University Accelerator Center, New Delhi 110067 (India)
Publication Date:
OSTI Identifier:
22271159
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 12; 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; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; ION BEAMS; IRRADIATION; NANOSTRUCTURES; OXYGEN; PHYSICAL RADIATION EFFECTS; SURFACE AREA; SURFACES; TITANIUM OXIDES; VACANCIES