Enhanced anomalous photo-absorption from TiO2 nanostructures

被引：26

作者：

Solanki, Vanaraj ^{[1
]}

Majumder, Subrata ^{[1
]}

Mishra, Indrani ^{[1
]}

Dash, P. ^{[2
]}

Singh, C. ^{[3
]}

Kanjilal, D. ^{[4
]}

Varma, Shikha ^{[1
]}

机构：

[1] Inst Phys, Bhubaneswar 751005, Orissa, India

[2] Utkal Univ, Bhubaneswar 751004, Orissa, India

[3] Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India

[4] Inter Univ Accelerator Ctr, New Delhi 110067, India

来源：

JOURNAL OF APPLIED PHYSICS | 2014年 / 115卷 / 12期

关键词：

PATTERN-FORMATION; PHOTOCATALYTIC ACTIVITY; ION; SURFACE; RUTILE; FILMS; SIZE; ABSORPTION;

D O I：

10.1063/1.4869550

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Two dimensional nanostructures have been created on the rutile TiO2 (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. (C) 2014 AIP Publishing LLC.

引用

收藏

页数：7

相关论文

共 35 条

[1] Visible-light photocatalysis in nitrogen-doped titanium oxides [J].

Asahi, R ;

Morikawa, T ;

Ohwaki, T ;

Aoki, K ;

Taga, Y .

SCIENCE, 2001, 293 (5528) :269-271

[2] THEORY OF RIPPLE TOPOGRAPHY INDUCED BY ION-BOMBARDMENT [J].

BRADLEY, RM ;

HARPER, JME .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1988, 6 (04) :2390-2395

[3] Stress-induced solid flow drives surface nanopatterning of silicon by ion-beam irradiation [J].

Castro, M. ;

Gago, R. ;

Vazquez, L. ;

Munoz-Garcia, J. ;

Cuerno, R. .

PHYSICAL REVIEW B, 2012, 86 (21)

[4] Hydrodynamic approach to surface pattern formation by ion beams [J].

Castro, Mario ;

Cuerno, Rodolfo .

APPLIED SURFACE SCIENCE, 2012, 258 (09) :4171-4178

[5] Synthesis, characterization, and photocatalytic activity of N-doped TiO2 nanotubes [J].

Chen, Yanyan ;

Zhang, Shoumin ;

Yu, Ying ;

Wu, Haihong ;

Wang, Shurong ;

Zhu, Baolin ;

Huang, Weiping ;

Wu, Shihua .

JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY, 2008, 29 (02) :245-249

[6] Effectiveness of nitrogen incorporation to enhance the photoelectrochemical activity of nanostructured TiO2:NH3 versus H2-N2 annealing [J].

Fabrega, Cristian ;

Andreu, Teresa ;

Gueell, Frank ;

Daniel Prades, Joan ;

Estrade, Sonia ;

Manuel Rebled, Jose ;

Peiro, Francesca ;

Ramon Morante, Joan .

NANOTECHNOLOGY, 2011, 22 (23)

[7] Formation of ordered nanoscale semiconductor dots by ion sputtering [J].

Facsko, S ;

Dekorsy, T ;

Koerdt, C ;

Trappe, C ;

Kurz, H ;

Vogt, A ;

Hartnagel, HL .

SCIENCE, 1999, 285 (5433) :1551-1553

[8] Roughness evolution of ion sputtered rotating InP surfaces: Pattern formation and scaling laws [J].

Frost, F ;

Schindler, A ;

Bigl, F .

PHYSICAL REVIEW LETTERS, 2000, 85 (19) :4116-4119

[9] ELECTROCHEMICAL PHOTOLYSIS OF WATER AT A SEMICONDUCTOR ELECTRODE [J].

FUJISHIMA, A ;

HONDA, K .

NATURE, 1972, 238 (5358) :37-+

[10] Theoretical investigation of size and shape effects on the melting temperature and energy bandgap of TiO2 nanostructures [J].

Guisbiers, G. ;

Van Overschelde, O. ;

Wautelet, M. .

APPLIED PHYSICS LETTERS, 2008, 92 (10)

← 1 2 3 4 →