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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
Citations
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Porous silicon—mechanisms of growth and applications
TL;DR: The present state-of-the-art in understanding the mechanisms of the formation of porous silicon and its physical properties is reviewed, with special emphasis on problems which were not much in the focus of existing review literature.
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The importance of surface chemistry in mesoporous materials: lessons from porous silicon biosensors
TL;DR: The potential of different porous silicon photonic crystals for biosensing in the context of its surface chemistry and nanostructure is discussed, both of which need to be optimized to obtain sensitive and stable devices.
Journal ArticleDOI
Optical gain in Si/SiO2 lattice: Experimental evidence with nanosecond pulses
TL;DR: In this article, a short lifetime of population inversion allowing a generation of short (a few nanosecond) amplified light pulses in the Si/SiO2 lattice was found.
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Silicon Quantum Dots for Biological Applications
TL;DR: This review article summarizes existing knowledge related to and recent research progress made in the methods for synthesizing silicon QDs, as well as their optical properties and surface-modification processes, and discusses drug delivery systems and in vitro and in vivo imaging applications that use siliconQDs.
Journal ArticleDOI
Silicon nanoparticles: Absorption, emission, and the nature of the electronic bandgap
TL;DR: In this article, the size-dependent dependence of the oscillator strength of the nanoparticles synthesized in the gas phase is studied. And the influence of the particle size-distribution on the optical spectra is investigated experimentally.
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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