Polypyrrole–poly(3,4-ethylenedioxythiophene)–Ag (PPy–PEDOT–Ag) nanocomposite films for label-free electrochemical DNA sensing

Insulating and semiconducting polymeric free-standing nanomembranes with biomedical applications

Free-standing nanomembranes, which are emerging as versatile elements in biomedical applications, are evolving from being composed of insulating (bio)polymers to electroactive conducting polymers.

A chitosan-Au-hyperbranched polyester nanoparticles-based antifouling immunosensor for sensitive detection of carcinoembryonic antigen

An electrochemical immunosensor was developed for the detection of carcinoembryonic antigen in whole blood, based on the antibiofouling properties of carboxylic acid group functionalized hyperbranched polyester nanoparticles.

Preparation and electrochemical catalytic application of nanocrystalline cellulose doped poly(3,4-ethylenedioxythiophene) conducting polymer nanocomposites

Nanocrystalline cellulose doped conducting polymer PEDOT nanocomposites can be prepared through both chemical (right) and electrochemical (left) polymerization methods.

Intrinsically conducting polymer nanowires for biosensing

The fabrication of conductive polymer nanowires and their sensing of nucleic acids, proteins and pathogens is reviewed in this feature article.

Multidimensional polypyrrole/iron oxyhydroxide hybrid nanoparticles for chemical nerve gas agent sensing application

Multidimensional FeOOH nanoneedle-decorated hybrid polypyrrole nanoparticles (PFFs) were fabricated using dual-nozzle electrospray and heat stirring process. To decorate metal oxide nanoneedles on the polypyrrole (PPy) surface, metal oxide particle-decorated PPys (E_PPy) were fabricated as starting materials. The E_PPy particles were prepared by dual-nozzle electrospray because ferric ions (Fe(3+)) dispersed on the surface reacted with hydroxide (OH(-)) ions in the collector solution without aggregation of each particles. Multidimensional hybrid PFFs with maximized surface area were then formed by heat stirring reaction in the aqueous metal precursor contained solutions. The decoration morphology of the metal oxide nanoneedles could be controlled by precursor concentration in the aqueous solution. These multidimensional hybrid PPFs were applied to nerve gas agent (DMMP) chemical sensor at room temperature with excellent sensitivity. The minimum detectable level (MDL) of PFFs was as low as 0.1 ppb, which is higher than that for a chemical sensor based on hybrid materials. This is because the metal oxide nanoneedles increase surface area and affinity to DMMP vapor.