Low energy X-ray fluorescence (XRF) and soft X-ray absorption (XAS) microspectroscopies at high space-resolution are employed for the investigation of the coelectrodeposition of composites consisting of a polypyrrole(PPy)-matrix and Mn-based ternary dispersoids, that have been proposed as promising electrocatalysts for oxygen-reduction electrodes. Specifically, we studied Mn–Co–Cu/PP, Mn–Co–Mg/...

We have developed a novel mediated biochemical oxygen demand (BOD) biosensor based on immobilized Bacillus subtilis (B. subtilis) on three-dimensional (3D) porous graphene-polypyrrole (rGO-PPy) composite. The 3D porous rGO-PPy composite was prepared using hydrothermal method following with electropolymerization. Then the 3D porous rGO-PPy composite was used as a support for immobilizing negativ...

Electroconductive scaffolds can be a promising approach to repair conductive tissues when natural healing fails. Recently, nerve tissue engineering constructs have been widely investigated due the challenges in creating structure with optimized physiochemical and mechanical properties close native tissue. The goal of current study was fabricate graphene-containing polycaprolactone/gelatin/polyp...

Polypyrrole (PPy) nanofibers have been fabricated on glassy carbon electrode (GCE) usingelectrochemical technique. Electropolymerization of pyrrole (Py) for the fabrication of PPy nanofiberswas occurred on GCE by applying a fixed potential of about 0.85 V for 120 sec in a mild basic solutioncontaining sodium carbonate and sodium perchlorate. In the mild basic media, the monomer, Py, isoxidized ...

Bilayer actuators of gold and polypyrrole doped with dodecylbenzenesulfonate, PPy(DBS), were microfabricated with lengths and thicknesses that varied over two orders of magnitude. The actuators were connected to rigid plates. The curvature of the bilayers was examined as a function of PPy and Au layer thicknesses to enable a determination of the actuation strain and Young’s modulus of the PPy(D...

polypyrrole (ppy/cl) and polyaniline (pani/cl) synthesized chemically onto sawdust (sd)was used for removal of thiocyanate (scn-) ions from aqueous solutions. the effect of someimportant parameters such as ph, initial concentration, sorbent dosage, and contact time onuptake of scn- was investigated. ppy/sd was found to be much more effective sorbent thanpani/sd for uptake scn- from aqueous solu...

This paper presents experimental results and analyses on the controlled manipulation of a liquid droplet. The droplet was manipulated upon local reduction and oxidation (redox) of dodecylbenzenesulfonate doped polypyrrole (PPy(DBS)) in an immiscible organic fluid of bulk dichloromethane (DCM, CH(2)Cl(2)). The electrochemically tunable wetting property of PPy(DBS) permitted liquid droplet manipu...

Aqueous Au nanoparticles (NPs) are employed as the building blocks to construct chainlike self-assembly architectures, which greatly enhance the photothermal performance at 808 nm. Biocompatible polypyrrole (PPy) is further adopted as the package material to coat Au NP chains, producing stable photothermal agents. As a result of contributions from chainlike Au, the PPy shell, as well as the Au-...

Cancer nanotechnology is emerging as one of the promising strategies combining photothermal therapy (PTT) and photoacoustic imaging (PAI) for the treatment of breast cancer and it has received considerable attention in the recent years because it is minimally invasive, prevents damage to non-targeted regions, permits fast recovery, and involves breast cancer imaging. The present study demonstra...