Formation of nanospindles of PEDOT through liquid crystalline template polymerization.

In the present work, we have electrochemically deposited polyaniline nanowires (PANIS) on glassy carbon electrode (GCE) from its monomer liquid crystalline template of anilinium-3-pentadecyl phenyl sulphonic acid (An 1 PDPSA 2 ). Further, electrode was modified by the electrochemical patterning of gold nanoparticles on the PANIS/GCE (PANIS/Au/GCE) by electrodeposition through chronoamperometry. Modified electrode characterized by electrochemical impedance, morphology, XRD, electroactive surface area, and later demonstrated its efficacy for the individual and simultaneous sensing of dopamine, ascorbic acid, serotonin, and uric acid. Finally, its performance in the real sample (blood serum) was evaluated. The superior electrocatalytic performance with higher sensitivity suggested that the modified electrode can be used as an excellent transducer for the sensing of neurotransmitters. V C 2016Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44351.

Abstract. In this paper, we are reporting a novel strategy for the preparation of conductive polyaniline-clay nanocomposite in Polyvinylchloride (PVC) matrix by admicellar emulsion polymerization using a low cost renewable resource based surfactant cum dopant. The highly oriented percolated network of polyaniline-clay nanocomposite in PVC matrix was revealed from the studies made by scanning electron microscopy (SEM) and atomic force microscopy (AFM). Fourier transform infrared spectroscopy (FTIR) results suggested that porous template was formed by the noncovalent interactions among the hydroxyl groups present in the nanoclay edges and the chloride ions present in PVC matrix. Here, the bio-based surfactant, 4-hydroxy-2-pentadecyl benzene-1-sulphonic acid (PDPSA) performed multiple roles of dopant, emulsifier and soft template during the polymerization of anilinium + PDPSA -(An + PDPSA -) in PVC-clay matrix. The prepared composite exhibited electrical conductivity (! dc ) of 4.8·10 -2 S/cm and electromagnetic interference shielding efficiency (EMI SE) of 55.2 dB suggesting it as a prospectable candidate for the encapsulation of electronic devices in high technological applications.

Self-assembled polyaniline nanowires stippled graphene nanocomposites (PGPCs) were prepared by in situ polymerisation of aniline in the presence of 3-pentadecylphenyl phosphate (3-PDPP) modified graphene sheets.

Here, we have prepared silver nanoparticle patterned functional liquid crystalline gels (SFLAG) through self-assembly process. The surface plasmon energy of SFLAGs were observed at~420 nm and FCC lattices of silver particles were confirmed with XRD. Formation of liquid crystalline gel phase was studied by microscopic techniques and rheology. Enhancement in the conductance of SFLAG modified glassy carbon electrode (SFLAG/GCE) was studied with electrochemical impedance spectroscopy. Finally its application is demonstrated as an electrochemical sensor for the oxidation of tyrosine using electrochemical techniques such as cyclic voltammetry, differential pulse voltammetry and chronoamperometry with a high current response and lower detection limit (10 nM). Electrochemical sensor performances such as interference of various analytes, selectivity, repeatability, storage stability and the real sample analysis with human blood serum were performed. All these excellent properties of SFLAG/GCE can be exploited as an electrochemical sensor for the analytical detection of tyrosine which is a biomarker for the early detection of cancer.