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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Journal ArticleDOI
Quantum confinement in size-selected, surface-oxidized silicon nanocrystals.
TL;DR: Size-selective precipitation and size-exclusion chromatography cleanly separate the silicon nanocrystals from larger crystallites and aggregates and provide direct evidence for quantum confinement in luminescence.
Journal ArticleDOI
High-yield plasma synthesis of luminescent silicon nanocrystals.
TL;DR: A scaleable single-step synthesis process for luminescent silicon nanocrystals based on a low-pressure nonthermal plasma is reported, paving the way for a simple, high-yield synthesis approach to this field.
Journal ArticleDOI
Fabrication of Single-Crystalline Silicon Nanowires by Scratching a Silicon Surface with Catalytic Metal Particles†
Kui-Qing Peng,Kui-Qing Peng,Juejun Hu,Yunjie Yan,Yin Wu,Hui Fang,Ying Xu,Shuit-Tong Lee,Jing Zhu +8 more
TL;DR: In this article, a novel strategy for preparing large-area oriented silicon nanowire arrays on silicon substrates at near room temperature by localized chemical etching is presented, which is based on metal-induced (either by Ag or Au) excessive local oxidation and dissolution of a silicon substrate in an aqueous fluoride solution.
Patent
Methods of fabricating nanostructures and nanowires and devices fabricated therefrom
Arun Majumdar,Ali Shakouri,Timothy D. Sands,Peidong Yang,Samuel S. Mao,Richard E. Russo,H. Feick,Eicke R. Weber,Hannes Kind,Michael H. Huang,Haoquan Yan,Yiying Wu,Rong Fan +12 more
TL;DR: One-dimensional nanostructures have uniform diameters of less than approximately 200 nm and are referred to as "nanowires" as mentioned in this paper, which include single-crystalline materials having different chemical compositions.
Journal ArticleDOI
Visible electroluminescence from porous silicon
Nobuyoshi Koshida,Hideki Koyama +1 more
TL;DR: In this paper, photoluminescent porous Si (PS) layers exhibit visible electroluminescence (EL) when the forward current density reaches a certain value, stable visible (orange) light is uniformly emitted through a semitransparent electrode.
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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