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A mechanism for enhanced hydrophilicity of silver nanoparticles modified TiO2 thin films deposited by RF magnetron sputtering

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Abstract.
Ag–TiO2 nanostructured thin films with silver volume fraction of 0–40.0% have been deposited on silicon
and quartz substrates by RF magnetron sputtering. Their crystal texture, surface topography, and
hydrophilicity have been characterized by X-ray diffractometer, transmission electron microscope, and
water contact angle apparatus. The relation of hydrophilic property and silver content has been studied
in detail. It is shown that silver content influences crystal texture of TiO2 thin films, and silver in the films is simple substance (Ag0). Hydrophilicity of the films increases with increasing silver content up to 5 vol% Ag and then decreases. A suitable amount (around 5.0 vol% Ag) of silver addition can significantly
enhance the hydrophilic behavior of TiO2 films. The mechanism can be attributed to the increase of
oxygen anion radicals O2-  and reactive center of surface Ti3+, and the better separation between
electrons and holes on the films surface.

Keywords: Silver, Nanoparticle, TiO2 thin films, Hydrophilicity, RF magnetron sputtering

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Informasi Detail

Judul Seri

Applied Surface Science

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Applied Surface Science 255 (2009) 6715–6720

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

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