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
Bright Upconversion Emission, Increased Tc, Enhanced Ferroelectric and Piezoelectric Properties in Er‐Doped CaBi4Ti4O15 Multifunctional Ferroelectric Oxides
TL;DR: Er3+-doped CaBi4Ti4O15 (CBT) bismuth layer structured ferroelectric ceramics were synthesized by the solid state method.
Journal ArticleDOI
Fabrication of high aspect ratio silicon pillars of <10 nm diameter
Wei Chen,Haroon Ahmed +1 more
TL;DR: In this paper, a 50 nm thick double layer of low and high molecular weight polymethylmethacrylate resist was exposed with an 80 kV electron beam of diameter smaller than 5 nm and the resist was developed in 3:7 cellusolve: methanol with ultrasonic agitation during development.
Journal ArticleDOI
Vapor sensitivity of thin porous silicon layers
TL;DR: In this article, the authors used spectroscopic ellipsometry to study optical changes in thin porous silicon layers due to exposure to vapors from different liquids, and found that capillary condensation was involved in the vapor sensitivity of the layers.
Journal ArticleDOI
Self-assembled synthesis of SERS-active silver dendrites and photoluminescence properties of a thin porous silicon layer
TL;DR: In this paper, a self-assembled localized microscopic electrochemical cell model and a diffusion-limited aggregation mode were used to explain the growth of silver dendritic nanostructures.
Journal ArticleDOI
Surface Oxidation and Luminescence Properties of Weblike Agglomeration of Silicon Nanocrystals Produced by a Laser Vaporization−Controlled Condensation Technique
TL;DR: In this paper, a web-like aggregates of coalesced Si nanocrystals are produced by a laser vaporization−controlled condensation technique, and the particles show luminescence properties that are similar to those of porous Si and Si nanoparticles produced by other techniques.
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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