Fractal features of titanium oxide surfaces

被引：56

作者：

Provata, A ^{[1
]}

Falaras, P ^{[1
]}

Xagas, A ^{[1
]}

机构：

[1] NRCPS Demokritos, Inst Phys Chem, GR-15310 Athens, Greece

来源：

CHEMICAL PHYSICS LETTERS | 1998年 / 297卷 / 5-6期

关键词：

D O I：

10.1016/S0009-2614(98)01127-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The fractal characteristics of TiO2 nanocrystalline films were studied and related to the efficiency of Light absorption. The fractal dimension of the film surface was computed using atomic force microscopy and D-f = 2.33 +/- 0.02 was found. Since the absorbed light energy Q(a), and therefore the resulting photocurrent I, are proportional to the effective film area S, we concluded that I similar to Q(a) similar to S similar to R-Df, where R is the linear size of the rectangular film surface. This conclusion points to a new photoelectrochemical method for the observation of the surface roughness and for the calculation of the fractal dimension in semiconducting films. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：484 / 490

页数：7

共 21 条

[1]

[Anonymous], 1991, NATURE

[2] A NEW UNIVERSALITY CLASS FOR KINETIC GROWTH - ONE-DIMENSIONAL MOLECULAR-BEAM EPITAXY [J].

DASSARMA, S ;

TAMBORENEA, P .

PHYSICAL REVIEW LETTERS, 1991, 66 (03) :325-328

[3] Synergetic effect of carboxylic acid functional groups and fractal surface characteristics for efficient dye sensitization of titanium oxide [J].

Falaras, P .

SOLAR ENERGY MATERIALS AND SOLAR CELLS, 1998, 53 (1-2) :163-175

[4] PHOTOCATALYZED REDUCTION OF CO2 IN AQUEOUS TIO2 SUSPENSION MIXED WITH COPPER-POWDER [J].

HIRANO, K ;

INOUE, K ;

YATSU, T .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 1992, 64 (02) :255-258

[5] ENVIRONMENTAL APPLICATIONS OF SEMICONDUCTOR PHOTOCATALYSIS [J].

HOFFMANN, MR ;

MARTIN, ST ;

CHOI, WY ;

BAHNEMANN, DW .

CHEMICAL REVIEWS, 1995, 95 (01) :69-96

[6] ELECTRON-PARAMAGNETIC-RES STUDY OF HYDRATED ANATASE UNDER UV IRRADIATION [J].

HOWE, RF ;

GRATZEL, M .

JOURNAL OF PHYSICAL CHEMISTRY, 1987, 91 (14) :3906-3909

[7] INTERFACIAL ELECTRON-TRANSFER IN COLLOIDAL METAL AND SEMICONDUCTOR DISPERSIONS AND PHOTODECOMPOSITION OF WATER [J].

KALYANASUNDARAM, K ;

GRATZEL, M ;

PELIZZETTI, E .

COORDINATION CHEMISTRY REVIEWS, 1986, 69 :57-125

[8] DYNAMIC SCALING OF GROWING INTERFACES [J].

KARDAR, M ;

PARISI, G ;

ZHANG, YC .

PHYSICAL REVIEW LETTERS, 1986, 56 (09) :889-892

[9] Nanocrystalline TiO2 (anatase) electrodes: Surface morphology, adsorption, and electrochemical properties [J].

Kavan, L ;

Gratzel, M ;

Rathousky, J ;

Zukal, A .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (02) :394-400

[10]

Mandelbrot B.B., 1983, The fractal geometry of nature

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