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

Journal Article · Fri Mar 28 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4869550· OSTI ID:22271159

Solanki, Vanaraj; Majumder, Subrata; Mishra, Indrani; Varma, Shikha ^[1]; Dash, P. ^[2]; Singh, C. ^[3]; Kanjilal, D. ^[4]

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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)

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.

• OSTI ID: 22271159
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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