Cu 2 O/Si radial nanowire (NWs) array heterojunctions were prepared by depositing O nanoparticles via chemical bath deposition on n-Si arrays that fabricated metal-assisted electroless etching. After 20 cycles of deposition, large numbers with form shells wrap the upper segment each Si nanowire. This method etching offers exceptional simplicity, flexibility, environmental friendliness, and scal...

Porous silicon (PSi) is a versatile nanomaterial which has been utilized in several applications such as optical switching, drug delivery and sensors since its discovery in 1991. This material has been extensively investigated as an optical sensor due to its high surface area, high sensitivity and variety of optical transduction possibilities, e.g. changes in uorescence or reectance (interfer...

Sub-100-nm silicon nanohole arrays were fabricated by a combination of the site-selective electroless deposition of noble metals through anodic porous alumina and the subsequent metal-assisted chemical etching. Under optimum conditions, the formation of deep straight holes with an ordered periodicity (e.g., 100 nm interval, 40 nm diameter, and high aspect ratio of 50) was successfully achieved....

Abstract Metal-assisted etching of silicon in HF aqueous solution has attracted widespread attention due to its potential applications electronics, photonics, renewable energy, and biotechnology. In this paper, the basic process mechanism metal assisted electrochemical vapor or liquid atmosphere based on galvanic cells are reviewed. This paper focuses use gas-phase oxidants O 2 H instead phase ...

In this article, a simple and cost-effective method to create patterned nanoindentations on Al surface via mold-assisted chemical etching process is demonstrated. This report shows the reaction-diffusion method which formed nanoscale shallow etch pits by the absorption/liberation behaviors of chemical etchant in poly(dimethylsiloxane) stamp. During subsequent anodization, it was possible to obt...

The paper deals with the fabrication of a p-CuS-n-Si nanocone heterojunction based highly sensitive broad band photodetector. Cone-like one dimensional Si nanostructures formed by metal assisted chemical etching, with superior antireflection characteristics have been used as templates for fabrication of the heterojunction. Covellite CuS material was synthesized by a simple chemical reaction for...