Bandgap tailoring of rutile TiO{sub 2}(110) via surface patterning with electron cyclotron resonance sputtering

Journal Article · Mon Jan 31 04:00:00 EST 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3549768· OSTI ID:21518275

Majumder, Subrata; Solanki, V; Varma, Shikha ^[1]; Paramanik, D ^[2]; Bag, B P ^[3]

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1. Institute of Physics, Bhubaneswar 751005 (India)
2. National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan)
3. Department of Colloids and Material Chemistry, IMMT, Bhubaneswar 751005 (India)

Crystalline TiO{sub 2} nanodots have been formed on single crystal rutile TiO{sub 2}(110) surfaces via ion beam sputtering method by utilizing Ar ion beams from electron cyclotron resonance source. Nearly five times enhancement in absorbance of visible light, {approx}5 times increase in luminescence, and {approx}0.1 eV narrowing of bandgap are observed for nanodot-patterned surfaces, in the absence of any dopant material. Formation of crystalline rutile TiO{sub 2} nanodots and development of Ti interstitials on the TiO{sub 2}(110) surface, after ion beam sputtering, are responsible for these observations. Results suggest that these nanodot-patterned rutile TiO{sub 2} surfaces can become effective photocatalysts.

• OSTI ID: 21518275
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 5 Vol. 98; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ARGON IONS
BEAMS
CHALCOGENIDES
CHARGED PARTICLES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
CYCLOTRON RESONANCE
DEPOSITION
ELECTROMAGNETIC RADIATION
ELECTRON CYCLOTRON-RESONANCE
EMISSION
ENERGY GAP
INTERSTITIALS
ION BEAMS
IONS
LUMINESCENCE
MATERIALS
MINERALS
MONOCRYSTALS
NANOSTRUCTURES
OPTICAL PROPERTIES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHOTOLUMINESCENCE
PHOTON EMISSION
PHYSICAL PROPERTIES
POINT DEFECTS
QUANTUM DOTS
RADIATIONS
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
RESONANCE
RUTILE
SPUTTERING
SURFACES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
VISIBLE RADIATION