Self-organized macrostructures in anodically formed mesoporous silica

S. Frey; B. Grésillon; F. Ozanam; J. N. Chazalviel; J. Carstensen; H. Föll; R. B. Wehrspohn

doi:10.1149/1.1960024

Self-organized macrostructures in anodically formed mesoporous silica

S. Frey, B. Grésillon, F. Ozanam, J. N. Chazalviel, J. Carstensen, H. Föll, R. B. Wehrspohn

Research output: Contribution to journal › Article › peer-review

Abstract

The electrochemical oxidation of silicon under high potentials (10-30 V) was investigated in weakly alkaline low-buffered fluoride media. The cyclic voltammogram exhibits a hysteresis of several orders of magnitude. Potentiostatically grown oxide films are either pale gray or show thin-film interference colors. Optical spectroscopy indicates here a porous silica layer on a thin compact SiO₂ film. Electron microscopy shows that the brilliant films consist of granular SiO₂ particles with sub-100 nm diameters with a homogeneous film thickness over the etching area. For U > 15 V micrometer-sized corrugations lead to a gray appearance. These macrostructures self-organize in a close-packed lattice with narrowly distributed dimensions.

Original language	English
Pages (from-to)	B25-B29
Journal	Electrochemical and Solid-State Letters
Volume	8
Issue number	9
DOIs	https://doi.org/10.1149/1.1960024
Publication status	Published - 29 Sept 2005

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title = "Self-organized macrostructures in anodically formed mesoporous silica",

abstract = "The electrochemical oxidation of silicon under high potentials (10-30 V) was investigated in weakly alkaline low-buffered fluoride media. The cyclic voltammogram exhibits a hysteresis of several orders of magnitude. Potentiostatically grown oxide films are either pale gray or show thin-film interference colors. Optical spectroscopy indicates here a porous silica layer on a thin compact SiO2 film. Electron microscopy shows that the brilliant films consist of granular SiO2 particles with sub-100 nm diameters with a homogeneous film thickness over the etching area. For U > 15 V micrometer-sized corrugations lead to a gray appearance. These macrostructures self-organize in a close-packed lattice with narrowly distributed dimensions.",

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T1 - Self-organized macrostructures in anodically formed mesoporous silica

AU - Frey, S.

AU - Grésillon, B.

AU - Ozanam, F.

AU - Chazalviel, J. N.

AU - Carstensen, J.

AU - Föll, H.

AU - Wehrspohn, R. B.

PY - 2005/9/29

Y1 - 2005/9/29

N2 - The electrochemical oxidation of silicon under high potentials (10-30 V) was investigated in weakly alkaline low-buffered fluoride media. The cyclic voltammogram exhibits a hysteresis of several orders of magnitude. Potentiostatically grown oxide films are either pale gray or show thin-film interference colors. Optical spectroscopy indicates here a porous silica layer on a thin compact SiO2 film. Electron microscopy shows that the brilliant films consist of granular SiO2 particles with sub-100 nm diameters with a homogeneous film thickness over the etching area. For U > 15 V micrometer-sized corrugations lead to a gray appearance. These macrostructures self-organize in a close-packed lattice with narrowly distributed dimensions.

AB - The electrochemical oxidation of silicon under high potentials (10-30 V) was investigated in weakly alkaline low-buffered fluoride media. The cyclic voltammogram exhibits a hysteresis of several orders of magnitude. Potentiostatically grown oxide films are either pale gray or show thin-film interference colors. Optical spectroscopy indicates here a porous silica layer on a thin compact SiO2 film. Electron microscopy shows that the brilliant films consist of granular SiO2 particles with sub-100 nm diameters with a homogeneous film thickness over the etching area. For U > 15 V micrometer-sized corrugations lead to a gray appearance. These macrostructures self-organize in a close-packed lattice with narrowly distributed dimensions.

U2 - 10.1149/1.1960024

DO - 10.1149/1.1960024

M3 - Article

AN - SCOPUS:25144445378

SN - 1099-0062

VL - 8

SP - B25-B29

JO - Electrochemical and Solid-State Letters

JF - Electrochemical and Solid-State Letters

IS - 9

ER -

Self-organized macrostructures in anodically formed mesoporous silica

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