𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Structured luminescent silicon produced with laser-assisted etching

✍ Scribed by A. V. Starovoitov; S. C. Bayliss

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
955 KB
Volume
12
Category
Article
ISSN
0268-2605

No coin nor oath required. For personal study only.

✦ Synopsis

We present an investigation into a new technique for producing luminescent porous silicon with controlled lateral microstructure. The process is based on the effect of laser-assisted stain etching of silicon with hydrofluoric acid solution. With the further goal of preparing two-dimensional periodical arrays of luminescent microdots, we studied the accuracy of the technique by etching single submillimetre structures with a lowpower laser. The size and exact position of the etched area are controlled by laser focusing and movement, respectively, with submillimetre accuracy. Samples exhibit orange luminescence when illuminated with UV or blue light.

We have studied the dependence of the efficiency of the luminescence, the structure and the rate of etching on parameters such as the HF concentration, the intensity and wavelength of illumination and the doping level of the silicon wafer. Optimization of the process parameters, and consistency with assumed mechanisms of luminescence and etching process, are discussed.

πŸ“œ SIMILAR VOLUMES

Effect of chemical etching combined with
Effect of chemical etching combined with laser illumination on the photoluminescence of porous silicon
✍ J.Q. Duan; B.R. Zhang; L.Z. Zhang; J.C. Mao; G.G. Qin πŸ“‚ Article πŸ“… 1993 πŸ› Elsevier Science 🌐 English βš– 174 KB

We have fabricated porous silicon layers (PSLs) in the anodizing solution, HF(48wt.\%): \(\mathrm{H}_{2} \mathrm{O}=1: 1\). After anodization, the PSL was etched in the same chemical solution as used for anodization and then illuminated with the \(476.5 \mathrm{~nm}\) line, with a power of \(20 \mat

Analysis of deprotonated acids with sili
Analysis of deprotonated acids with silicon nanoparticle-assisted laser desorption/ ionization mass spectrometry
✍ Yimin Hua; Shai Dagan; Samanthi Wickramasekara; Dylan J. Boday; Vicki H. Wysocki πŸ“‚ Article πŸ“… 2010 πŸ› John Wiley and Sons 🌐 English βš– 249 KB

## Abstract Chemically modified silicon nanoparticles were applied for the laser desorption/negative ionization of small acids. A series of substituted sulfonic acids and fatty acids was studied. Compared to desorption ionization on porous silicon (DIOS) and other matrix‐less laser desorption/ioniz

Detailed structural characterization of
Detailed structural characterization of modified silicone copolymers by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry
✍ Seiichi Yoshida; Sinya Yamamoto; Tasuku Takamatsu πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 502 KB

The feasibility of using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry for detailed structural characterization of ethylene oxide-or perfluoroalkyl-modified poly(dimethylsiloxane) copolymers was investigated. Analysis of the results with the aid of a spread-sheet compu

Rapid characterization of Bacillus spore
Rapid characterization of Bacillus spores targeting species-unique peptides produced with an atmospheric pressure matrix-assisted laser desorption/ionization source
✍ Patrick A. Pribil; Elizabeth Patton; Gavin Black; Vladimir Doroshenko; Catherine πŸ“‚ Article πŸ“… 2005 πŸ› John Wiley and Sons 🌐 English βš– 190 KB

## Abstract New and improved strategies are eagerly sought for the rapid identification of microorganisms, particularly in mixtures. Mass spectrometry remains a powerful tool for this purpose. Small acid‐soluble proteins (SASPs), which are relatively abundant in __Bacillus__ spores, represent poten