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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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The Microemulsion Synthesis of Hydrophobic and Hydrophilic Silicon Nanocrystals
Richard D. Tilley,Kenji Yamamoto +1 more
TL;DR: In this paper, a liquid-phase synthetic approach using surfactant molecules to control particle growth, producing highly monodisperse silicon particles, which are capped by functional organic molecules that passivate and protect the silicon particles from oxidation.
Journal ArticleDOI
Evidence for quantum confinement in the photoluminescence of porous Si and SiGe
Spyros Gardelis,J. S. Rimmer,Philip Dawson,Bruce Hamilton,R. A. Kubiak,Terry E. Whall,Evan H. C. Parker +6 more
TL;DR: In this paper, the authors used anodization techniques to process porous surface regions in p-type Czochralski Si and in P-type Si0.85Ge0.15 epitaxial layers grown by molecular beam epitaxy.
Journal ArticleDOI
Some Perspectives on the Luminescence Mechanism via Surface-Confined States of Porous Si
TL;DR: In this paper, the authors elaborate on the explanation of radiative emission involving surface-confined states on the nanocrystallites of porous Si and give a model description of the origin of visible luminescence in porous Si.
Journal ArticleDOI
Porous silicon biosensor for detection of viruses
TL;DR: A new method for improving the sensitivity for detection of the bacteriophage virus MS2 using thin films of nanoporous silicon, which exhibits sensitivity and dynamic range similar to the Luminex liquid array-based assay while outperforming protein micro-array methods.
Journal ArticleDOI
Photoluminescence of Si-rich SiO2 films : Si clusters as luminescent centers
TL;DR: In this paper, the photoluminescence of Si-rich SiO2 films has been measured for the as-deposited and annealed films, showing that the gap between the highest occupied and lowest occupied molecular orbitals decreases as the size increases, causing the redshift of the luminescence peak.
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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