Article (Scientific journals)
Kinked silicon nanowires: Superstructures by metal-assisted chemical etching
Sandu, G.; Avila Osses, Jonathan; Luciano, M. et al.
2019In Nano Letters, 19, p. 7681
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Keywords :
Finite-element modeling; Aspect ratio; Finite element method; Metals; Nanowires; Silicon; Biological cells; Chemical etching; Crystallographic orientations; Etching parameters; High aspect ratio; Mechanically stable; Metal-assisted chemical etching; Silicon nanowires; Etching
Abstract :
[en] We report on metal-assisted chemical etching of Si for the synthesis of mechanically stable, hybrid crystallographic orientation Si superstructures with high aspect ratio, above 200. This method sustains high etching rates and facilitates reproducible results. The protocol enables the control of the number, angle, and location of the kinks via successive etch-quench sequences. We analyzed relevant Au mask catalyst features to systematically assess their impact on a wide spectrum of etched morphologies that can be easily attained and customized by fine-tuning of the critical etching parameters. For instance, the designed kinked Si nanowires can be incorporated in biological cells without affecting their viability. An accessible numerical model is provided to explain the etch profiles and the physicochemical events at the Si/Au-electrolyte interface and offers guidelines for the development of finite-element modeling of metal-assisted Si chemical etching. © Copyright © 2019 American Chemical Society.
Disciplines :
Materials science & engineering
Author, co-author :
Sandu, G.;  Institute of Information and Communication Technologies, Electronics and Applied Mathematics, Université Catholique de Louvain, Louvain-la-Neuve, 1348, Belgium
Avila Osses, Jonathan ;  Institute of Information and Communication Technologies, Electronics and Applied Mathematics, Université Catholique de Louvain, Louvain-la-Neuve, 1348, Belgium
Luciano, M.;  Interface and Complex Fluids Laboratory, Université de Mons, Mons, 7000, Belgium
Caina, D.;  Institute of Information and Communication Technologies, Electronics and Applied Mathematics, Université Catholique de Louvain, Louvain-la-Neuve, 1348, Belgium, Facultad de Ingeniería, Ciencias Físicas y Matemática, Universidad Central Del Ecuador, Quito, 170521, Ecuador
Stopin, A.;  School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, United Kingdom
Bonifazi, D.;  School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, United Kingdom
Gohy, J.-F.;  Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Louvain-la-Neuve, 1348, Belgium
Silhanek, Alejandro  ;  Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
Florea, I.;  Laboratoire de Physique des Interfaces et des Couches Minces, Ecole Polytechnique, Palaiseau, 91128, France
Bahri, Mounib;  Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 CNRS - Université de Strasbourg, 67087 Strasbourg, France
Ersen, O.;  Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 CNRS, Université de Strasbourg, Strasbourg, 67087, France
Leclère, P.;  Laboratory for Chemistry of Novel Materials, Center for Innovation and Research in Materials and Polymers, Université de Mons, Mons, 7000, Belgium
Gabriele, S.;  Interface and Complex Fluids Laboratory, Université de Mons, Mons, 7000, Belgium
Vlad, A.;  Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Louvain-la-Neuve, 1348, Belgium
Melinte, S.;  Institute of Information and Communication Technologies, Electronics and Applied Mathematics, Université Catholique de Louvain, Louvain-la-Neuve, 1348, Belgium
More authors (5 more) Less
Language :
English
Title :
Kinked silicon nanowires: Superstructures by metal-assisted chemical etching
Publication date :
08 October 2019
Journal title :
Nano Letters
ISSN :
1530-6984
eISSN :
1530-6992
Publisher :
American Chemical Society
Volume :
19
Pages :
7681
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
ANR - Agence Nationale de la Recherche [FR]
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
RRA - National Radio Research Agency [KR]
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Funding number :
Division of Arctic Sciences, ARC: 14/19-057; National Radio Research Agency, RRA: 15-CE09-0009-01
Available on ORBi :
since 13 November 2019

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