The fabrication of porous Si-based Er-doped light-emitting devices is a very promising developing field for all-silicon light emitters. However, while luminescence of Er-doped porous silicon devices has been demonstrated, very little attention has been devoted to the doping process itself. We have undertaken a detailed study of this process, examining the porous silicon matrix from several poin...

Surface chemistry is extremely important in microarray technology, since it determines the successful attachment of the molecules, spot morphology or signal intensity. This paper describes development of functionalised gold layer surfaces deposited onto porous silicon as substrates for microarray experiments. Two gold textures were studied in order to find the best ratio between signal intensit...

In the present work, the photo-acoustic emission from nanostructured copper/porous silicon hybrid systems was studied. Copper nanoparticles were grown by photo-assisted electroless deposition on crystalline silicon and nanostructured porous silicon (nanoPS). Both the optical and photo-acoustic responses from these systems were determined. The experimental results show a remarkable increase in t...

Sensors & Transducers Journal (ISSN 1726-5479) is a peer review international journal published monthly online by International Frequency Sensor Association (IFSA). Available in electronic and CD-ROM. Abstract: Porous silicon (PS) sensor based on capacitive technique used for measuring relative humidity has the advantages of low cost, ease of fabrication with controlled structure and CMOS compa...

Using time-resolved photoluminescence spectroscopy over a wide range of temperatures, we were able to probe both radiative and nonradiative relaxation processes in luminescent porous silicon. By comparing the photoluminescence decay times from freshly prepared and oxidized porous silicon, we show that radiative processes should be linked with quantum confinement in small Si nanocrystallites and...

Geometrically scaled PS-based structures were fabricated in order to develop gas sensing devices by exploring porous silicon (PS) electrical characteristics. The electrical behavior of PS devices respond to polar organic vapors (as acetone and ethanol) reversibly in a reproducible way. Devices were fabricated with three different perimeters, maintaining a constant area (5.76 mm) and constant PS...

A novel white light-promoted reaction using photoluminescent nanocrystalline silicon enables the hydrosilylation of alkenes and alkynes, providing stabilization of the porous silicon without significant loss of the photoemissive qualities of the material. Photopatterning and lithographic fabrication of isolated porous silicon structures are made possible. Experiments and observations are presen...

We report an experimental investigation of the nonlinear optical properties of nanoporous silicon optical waveguides measured at 1550 nm. The nonlinear properties including two-photon absorption, self-phase modulation, free-carrier absorption and free-carrier plasma dispersion are characterized and compared with similar measurements conducted on a conventional silicon-on-insulator ridge wavegui...

Porous silicon (PS) can be used as a loading template in sensing or matrix to develop nanoparticle arrays. We present comprehensive study of PS morphology and optical properties before after the pore opening process, including determination thickness, size, density layers, its surface wettability, reflectivity. The samples were fabricated by electrochemical anodization monocrystalline wafer 5–2...

Abstract This paper study the characteristics of nano crystalline silicon prepared with use electrochemical etching time (15,20) min for salt and Nitric acid (HNO3) Ethanol Hydrofluoric acid, effect this solutions on porous (ps) will be produced by using from p-type bulk resistivity (1-10 Ω.cm) different time. after that, make a comparison morphological properties silicon. Research employing X-...