Journal ArticleDOI
Silicon quantum wire array fabrication by electrochemical and chemical dissolution of wafers
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TLDR
In this paper, free standing Si quantum wires can be fabricated without the use of epitaxial deposition or lithography using electrochemical and chemical dissolution steps to define networks of isolated wires out of bulk wafers.Abstract:
Indirect evidence is presented that free‐standing Si quantum wires can be fabricated without the use of epitaxial deposition or lithography. The novel approach uses electrochemical and chemical dissolution steps to define networks of isolated wires out of bulk wafers. Mesoporous Si layers of high porosity exhibit visible (red) photoluminescence at room temperature, observable with the naked eye under <1 mW unfocused (<0.1 W cm−2) green or blue laser line excitation. This is attributed to dramatic two‐dimensional quantum size effects which can produce emission far above the band gap of bulk crystalline Si.read more
Citations
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Femtosecond laser fragmentation from water-dispersed microcolloids: toward fast controllable growth of ultrapure Si-based nanomaterials for biological applications
Pierre Blandin,Ksenia Maximova,M. B. Gongalsky,Juan F. Sánchez-Royo,Vladimir S. Chirvony,Marc Sentis,Victor Yu. Timoshenko,Andrei V. Kabashin +7 more
TL;DR: The possibility for the fast synthesis of non-aggregated, low-size-dispersed, crystalline Si-based nanoparticles, whose size and surface oxidation can be controlled by changing the initial microcolloid concentration and the amount of dissolved oxygen in the water is demonstrated.
Journal ArticleDOI
Microstructures and Visible Photoluminescence of TiO2 Nanocrystals
TL;DR: In this paper, X-ray diffraction and Raman spectroscopy of nanocrystalline titanium dioxide (TiO 2 ) of anatase structure was obtained by an annealing treatment of the as-prepared nanocrystals at various temperatures.
Journal ArticleDOI
Preparation and luminescent properties of europium-doped yttria fibers by electrospinning
Hongquan Yu,Hongwei Song,Guohui Pan,Suwen Li,Zhongxin Liu,Xue Bai,Tie Wang,Shaozhe Lu,Haifeng Zhao +8 more
TL;DR: In this article, the spectral properties of Y 2 O 3 :Eu 3+ fibers were studied, in contrast with those of bulk powders, and the results indicated that the excited charge transfer band had slightly blue shift in comparison with that in the bulk due to weaker covalence of Eu-O bonds.
Journal ArticleDOI
Erbium luminescence in porous silicon doped from spin‐on films
A. M. Dorofeev,N. V. Gaponenko,Vitaly Bondarenko,E. E. Bachilo,N. Kazuchits,A. A. Leshok,G. N. Troyanova,N. N. Vorosov,Victor E. Borisenko,Hubert Gnaser,W. Bock,P. Becker,Hans Oechsner +12 more
TL;DR: Erbium photoluminescence at room temperature and at 77 K has been observed from porous silicon doped with erbium from a spin-on silica gel film.
Journal ArticleDOI
Monte Carlo simulations of phonon transport in nanoporous silicon and germanium
TL;DR: In this article, heat conduction of nanoporous silicon and germanium thin films is studied thanks to a statistical approach and the resolution of phonon Boltzmann transport equation is performed with a Monte Carlo technique in order to assess thermal conductivity.
References
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Journal ArticleDOI
Electrolytic shaping of germanium and silicon
TL;DR: In this article, the properties of electrolyte-semiconductor barriers are described, with emphasis on germanium, and the use of these barriers in localizing electrolytic etching is discussed.
Journal ArticleDOI
Unusually low surface-recombination velocity on silicon and germanium surfaces.
TL;DR: It is found that a standard, widespread, chemical-preparation method for silicon, oxidation followed by an HF etch, results in a surface which from an electronic point of view is remarkably inactive, which has implications for the ultimate efficiency of silicon solar cells.
Journal ArticleDOI
Infrared spectroscopy of Si(111) and Si(100) surfaces after HF treatment: Hydrogen termination and surface morphology
TL;DR: In this paper, multiple internal infrared reflection spectroscopy has been used to identify the chemical nature of chemically oxidized and subsequently HF stripped silicon surfaces, and these very inert surfaces are found to be almost completely covered by atomic hydrogen.
Journal ArticleDOI
Hydrogen desorption kinetics from monohydride and dihydride species on silicon surfaces.
TL;DR: In this article, the authors measured hydrogen desorption from monohydride and dihydride species on crystalline-silicon surfaces using transmission Fourier-transform infrared (FTIR) spectroscopy.
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