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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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Visible luminescence from silicon surfaces microstructured in air
TL;DR: In this article, visible luminescence from SiOx formed by microstructuring silicon surfaces with femtosecond laser pulses in air is reported, and the amount of oxygen incorporated into the silicon surface depends on the laser fluence; the peak wavelength of the primary luminance band varies between 540 and 630 nm, depending on the number of laser shots.
Journal ArticleDOI
Structures and energetics of hydrogen-terminated silicon nanowire surfaces.
Ruiqin Zhang,Yeshayahu Lifshitz,D. D. D. Ma,Y. L. Zhao,Th. Frauenheim,Shuit-Tong Lee,S. Y. Tong +6 more
TL;DR: The analysis and density-functional tight-binding simulations of possible configurations of silicon nanowires enclosed by low-index surfaces reveal a number of remarkable features.
Journal ArticleDOI
Progress towards silicon optoelectronics using porous silicon technology
TL;DR: Porosity has already resulted in significant performance gains, or might do so in the future as mentioned in this paper, and the performance of a variety of porous Si-based discrete optoelectronic devices has been reviewed.
Journal ArticleDOI
Highly Luminescent and Nontoxic Amine-Capped Nanoparticles from Porous Silicon: Synthesis and Their Use in Biomedical Imaging
TL;DR: Stable and brightly luminescent amine-terminated Si nanoparticles (SiNPs) have been synthesized from electrochemically etched porous silicon and exhibited an exceptional stability over a wide pH range (4-14).
Journal ArticleDOI
Characterization of silicon nanoparticles prepared from porous silicon
TL;DR: The photoluminescence (PL) spectrum shows two peaks: a red peak at around 680 nm and a blue peak between 415 and 446 nm, which is not typical for as-prepared porous silicon (PS).
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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