Journal ArticleDOI
Silicon quantum wire array fabrication by electrochemical and chemical dissolution of wafers
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
Blue‐green luminescence from porous silicon carbide
Takahiro Matsumoto,Jun Takahashi,Teruyuki Tamaki,Toshiro Futagi,Hidenori Mimura,Yoshihiko Kanemitsu +5 more
TL;DR: Porous silicon carbide has been fabricated using single crystal 6H-SiC that has a wider indirect band gap than silicon crystal as discussed by the authors, and the peak wavelength is around 460 nm, below the band gap of crystalline SiC.
Journal ArticleDOI
Enhanced Radiative Emission Rate and Quantum Efficiency in Coupled Silicon Nanocrystal-Nanostructured Gold Emitters
TL;DR: A detailed analysis of the luminescence data indicated a local-field-enhanced quantum efficiency of 58% for the Si nanocrystals coupled to the nanoporous gold layer.
Journal ArticleDOI
Optical properties of porous silicon superlattices
TL;DR: In this paper, the authors demonstrate that porous silicon superlattices act like a multilayer dielectric device, and demonstrate that they can be used to measure reflectance measurements in the infrared and visible range.
Journal ArticleDOI
Porous Silicon Microcavities for Biosensing Applications
TL;DR: In this paper, a DNA biosensor has been fabricated based on a porous silicon multiple peak microcavity structure, which is shown to be an ideal host for sensor applications.
Journal ArticleDOI
Silicon Nanocrystals: Photosensitizers for Oxygen Molecules
Dmitri Kovalev,Minoru Fujii +1 more
TL;DR: In this article, the interaction between O 2 and silicon nanocrystals was explored, which can be employed in the photosynthesis of singlet oxygen, and it was shown that nanoscale Si has entirely new properties owing to morphological and quantum size effects, i.e., large accessible surface areas and excitons of variable energies.
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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