WO 3 and /PAni, as a ceramic-polymer composite, were synthesized, characterized, evaluated electrocatalyst support for platinum toward the methanol oxidation reaction in an acid medium. Pt supported by chemical reduction (25.5 % wt) on physically mixed with chemically synthesized PAni (Pt/WO /PAni(20%)) was compared physical mixture of three materials /PAni-PM). The profiles acidic medium show ...

Abstract Polyaniline (PANI) has received significant attention in basic and applied studies because it electrical electrochemical properties comparable to conventional semiconductors metals. PANI's can be controlled through its preparation methods. Accordingly, the present work, two different samples of PANI were prepared by polymerization aniline monomer via situ method using oxidizers dichrom...

Two tungsten disulfide (WS₂)-based core-shell nanocomposites were fabricated using readily available reagents and simple procedures. The surface was pre-treated with a surfactant couple in a layer-by-layer approach, enabling good dispersion of the WS₂ nanostructures in aqueous media and providing a template for the polymerization of a silica (SiO₂) shell. After a Stöber-like reaction, a conform...

Most of the recent developments in ultrasensitive detection of nucleic acid are based on the gold nanoparticles and carbon nanotubes as a medium of signal amplification. Here, we present an ultrasensitive electrochemical nucleic acid biosensor using the conducting polyaniline (PANI) nanotube array as the signal enhancement element. The PANI nanotube array of a highly organized structure was fab...

Graft polymerization has been used, for the first time, to prepare a dense conductive polymer coating on free-standing luminescent silicon nanoparticles. The silicon nanoparticles maintained their photoluminescence and crystallinity after surface modification. The nanoparticles were first surface hydroxylated and then reacted with (3-bromopropyl)trichlorosilane to form a dense bromopropylsilane...

Polyaniline (PANi)-grafted multiwalled carbon nanotube (MWNT) composite is prepared by a two-step reaction sequence. MWNT is first functionalized with 4-aminobenzoic acid in polyphosphoric acid/phosphorous pentoxide as a ‘‘direct’’ Friedel-Crafts acylation reaction medium. The resultant 4-aminobenzoyl-functionalized MWNT is then treated with aniline using ammonium persulfate/aqueous hydrochlori...

Introduction Organic thin-film transistors (TFT) have received considerable attention due to promises of low manufacturing costs, ease of processibility, and extendibility to flexible circuits. The feasibility of organic TFTs has largely been demonstrated with devices that use metal source and drain electrodes, such as gold and palladium. Such devices, when fabricated in the bottom-contact (BC)...