In this work, we theoretically and experimentally demonstrate a highly sensitive porous silicon membrane waveguide biosensor in the Kretschmann configuration, and show how the cladding material directly impacts the waveguide sensor detection sensitivity and resonance width. Dielectric and metal-clad porous waveguides in the Kretchmann configuration have the potential to achieve significantly en...

Porous silicon is a suitable host material for biosensing applications due to its high surface area to volume ratio, which enables substantial infiltration of biomolecules. Resonant waveguides can be fabricated from porous silicon based on a two layer porous silicon structure. Light is coupled into the waveguide only at a particular angle of incidence. Biomolecular binding inside the pores indu...

In this paper metal-assisted chemical etching has been applied to pattern porous silicon regions and silicon nanohole arrays in submicron period simply by using positive photoresist as a mask layer. In order to define silicon nanostructures, Metal-assisted chemical etching (MaCE) was carried out with silver catalyst. Provided solution (or materiel) in combination with laser interference lithogr...

Nano-porous silicon were simply prepared from p-type single crystalline silicon wafer by electrochemical etching technique via exerting constant current density in two different HF-Ethanol and HF-Ethanol-H2O solutions. The mesoporous silicon layers were characterized by field emission scanning electron microscopy and scanning electron microscopy. The results demonstrate that the width of nano-p...

High porosity porous silicon holds great promise for applications such as sensing where large surface area is required. However electrical measurements of films, and implementation into electronic devices, have thus far been limited due to the high resistance low mechanical strength films. In this work, microfabrication processes were refined then implemented enable studies films with 81%. Opti...

Desorption/ionization on porous silicon mass spectrometry (DIOS-MS) is a novel method for generating and analyzing gas-phase ions that employs direct laser vaporization. The structure and physicochemical properties of the porous silicon surfaces are crucial to DIOS-MS performance and are controlled by the selection of silicon and the electrochemical etching conditions. Porous silicon generation...

An ordered porous antimony-doped tin oxide (ATO) film was successfully prepared using a simple coating process with colloidal templates. The facile production was effective when a combination of 16-nm ATO (as a model of an inorganic nanoparticle) and polystyrene (PS) spheres (as a model of the template) weresimply coated to produce a composite ATO/PS film. Heat treatment was then used to remove...

Porous silicon samples have been reduced in nanometric particles by a well known industrial mechanical process, the ball grinding in a planetary mill; the process has been extended to crystalline silicon for comparison purposes. The silicon nanoparticles have been studied by X-ray diffraction, infrared spectroscopy, gas porosimetry and transmission electron microscopy. We have estimated crystal...

In this work, we reported on room temperature porous silicon (PS) and embedding PS using simple economical techniques of electrochemical etching thermal evaporation. The substrate was prepared the technique electrochemically n-type Si (100) wafer at a constant current density 10 mA/cm2 for min under illumination incandescent white light. After formation, Ge pieces were thermally evaporated onto...

Silicon possesses a high theoretical specific capacity and is promising high-performance anode material for lithium-ion batteries (LIBs). However, it shows poor cycling performance because of volume expansion. A hollow structure can improve Si performance, the template method one most common methods micro/nanosphere preparation. polystyrene (PS) microsphere has advantages having uniform control...