Impregnation of porous silicon with conducting polymers

Abstract

Fabrication of porous silicon layers using the electrochemical technique followed by filling the nanopores with a group of conducting polymers is investigated. Our findings revealed that the deposition of polymer proceeds homogeneously inside the nanopores strating from the pore bottom and propagates into the outer surface. The polymerization process was conducted and controlled by the potentiostatic and galvanostatic modes with charactarestic, defined polymerization stages. As‐formed hybrid nanocomposites were charactarized using different analytical techniques. Polypyrrole, polyaniline and polythiophene were tested in this study. By selective dissolution of porous silicon template, polymeric nanowires were obtained. The fabrication process, the electrochemical measurements and the porous silicon filling mechanism with polymer are throughly addressed and discussed (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Surface-enhanced Raman scattering (SERS)-active substrates from silver plated-porous silicon for detection of crystal violet

“…Thus, development of SERS substrates with high sensitivity, stability and reproducibility remains an active area of research. In the past decade, SERS substrates could be achieved on porous silicon (PSi) layers benefiting from the huge internal surface area and its open porous structures [7]. Various Ag nanostructures were synthesized on PSi via thermal decomposition [8], chemical deposition on SiNWs [9] or by immersion plating [10,11].…”

Optical Study of Porous Silicon Layers Produced Electrochemically for Photovoltaic Application

“…Porous silicon has undergone many developments; it has a very wide field of application and has received a great deal of attention from researchers because of its potential use in a variety of industrial applications such as photovoltaic device applications [1][2][3][4], chemical and gas sensors [5][6][7][8][9][10][11][12], biosensors [13,14], biomedical applications [15], micromachining [16][17][18], templates for micro-and nanofabrication [19][20][21], and solar cells and photoluminescence [1,22,23]. However, a very limited data of optoelectronic uses in this field are available [24,25].…”

Hyaluronic Acid–Modified Porous Silicon Films for the Electrochemical Sensing of Bacterial Hyaluronidase

“…The known poor stability of freshly etched pSi in aqueous environments against oxidation, has been recently successfully addressed by suppressing the formation of the silica layer, e.g., by hydrosilylation, electrografting or polymer coatings . The coating of pSi with conductive polymers is of special interest for the development of amperometric biosensors, because apart from providing stability, the polymer renders the surface conductive . Here we exploit a different approach, introduced by Salonen et al, which is the thermal treatment of pSi with acetylene, replacing the highly reactive silicon hydride (pSi‐H) by SiC‐bonded chemical species (pSi‐THC).…”