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Silicon quantum wire array fabrication by electrochemical and chemical dissolution of wafers
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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
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Hydrogen Silsesquioxane: A Molecular Precursor for Nanocrystalline Si−SiO2 Composites and Freestanding Hydride-Surface-Terminated Silicon Nanoparticles
TL;DR: In this paper, the bulk preparation of nanocrystalline Si−SiO2 composites via straightforward reductive thermal annealing of a well-defined molecular precursor, hydrogen silsesquioxane, is reported.
Journal ArticleDOI
Confined many-electron systems
TL;DR: In this article, the influence of spatial confinement on the physical and chemical properties of many quantum mechanical systems is discussed, including low-dimensional electron gas or impurity atoms in artificial mesoscopic scale semiconductor structures as well as atoms and molecules trapped in microscopic cavities like molecular zeolite sieves.
Journal ArticleDOI
Synthesis routes for large volumes of nanoparticles
Ombretta Masala,Ram Seshadri +1 more
TL;DR: In this article, a review focusing on the preparation of capped nanoparticles of inorganic materials, classified by composition, is presented, with particular emphasis on methods that yield large volumes of nanoparticles, and recent novel methods that may not necessarily be scalable.
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Lewis acid mediated functionalization of porous silicon with substituted alkenes and alkynes
TL;DR: In this article, a mild and general approach for covalent modification of the surface of porous silicon through EtAlCl2 mediated hydrosilylation of readily available alkynes and alkenes which yields surface bound vinyl and alkyl groups, respectively, was reported.
Journal ArticleDOI
Ambipolar Diffusion of Photocarriers in Electrolyte-Filled, Nanoporous TiO2†
TL;DR: In this paper, transient photocurrent measurements on solar cell structures based on dye-sensitized, porous TiO2 films filled with a liquid electrolyte were reported, interpreted as ambipolar dif...
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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