this study presents the electric behavior of sandwich devices based on porous silicon (ps) thin films with au/ps/si/cu structure when the material’s surface is exposed to different gases. ps thin films were fabricated by the electrochemical anodization method of si–c (100) substrates with resistivity 1.4-2.6 ωcm. samples were anodized in a solution of hf (48%), c2h5oh (99.98%) and distilled wat...

Mirage effect is contactless and non destructive method which has been used a lot to determine thermal properties of different  kind of samples , transverse photothermal deflection PTD in  skimming configuration with ccd camera  and special programs is used to determine thermal conductivity of porous silicon ps  film. Ps samples were prepared by electrochemical etching. Thermal conductivity wit...

Mirage effect is contactless and non destructive method which has been used a lot to determine thermal properties of different  kind of samples , transverse photothermal deflection PTD in  skimming configuration with ccd camera  and special programs is used to determine thermal conductivity of porous silicon ps  film. Ps samples were prepared by electrochemical etching. Thermal conductivity wit...

For decades Electrochemical Polishing (ECP) has been used for surface polishing of bulk metal materials such as copper and stainless steel. However, it was found very challenging to planarize patterned copper films electrodeposited on silicon wafers. This work studied the mechanisms of ECP, the surface profiles and ECP effects of copper bulk and films in various electrolyte solutions. Satisfied...

This paper focuses on finding optimal electrochemical conditions from linear sweep voltammetry analysis for preparing highly reproducible tip-enhanced Raman scattering (TERS) conical gold tips with dc-pulsed voltage etching. Special attention is given to the reproducibility of tip apex shapes with different etchant mixtures. We show that the fractional Brownian motion model enables a mathematic...

Real-time monitoring of carbon nanotube conductance during electrochemical and chemical etching reveals the electronic signatures of individual bond alteration events on the nanotube sidewall. Tracking the conductance of multiple single-molecule experiments through different synthetic protocols supports putative mechanisms for sidewall derivatization. Insights gained from these mechanistic obse...

Based on last years field emission (FE) results achieved with randomly distributed free-standing gold nanowires (NW) [1], cathodes with regular arrays of Au-NW patches (50 μm diameter) were fabricated by means of a shadow mask during heavy ion irradiation of polycarbonate foils [2-3]. The number density, diameter Ø, and length L of the NW were controlled by the ion fluence f, foil etching time,...