Research

Chem. Comm. 2012, 48, 10862; Indian Patent applied, 2012 (400/kol/2012)

2. Soft-template method preparation of polyaniline nanotube

I have developed a soft template method of polyaniline nanotubes synthesis using aromatic tetra-carboxylic acid. In position of aromatic tetra carboxylic acid we have first used benzene 1,2,4,5-tetracarboxylic acid (BTCA), which simultaneously acts as a dopant acid as well as a structure-directing agent to produce high aspect ratio nanotubes having uniform diameter. The diameter of the fibers is intricately tuned by changing the ratio of BTCA to aniline. The effect of dopant concentration in the polymer composites has been investigated with the help of ¹H-NMR, UV-Vis and IR studies. The dopant acid plays an important role in the fiber formation, particularly in the nanotube formation. The outer diameter (OD) of PANI nanotubes depends on the size of the dopant tetracarboxylic acid under identical reaction conditions and it follows the order ODPTCA > ODNTCA > ODBTCA. The electrical measurement data show that the conductivities of the BTCA–PANI nanotubes depend on the BTCA to aniline molar ratios, and the low temperature charge transports in these composites predominantly follow the 3D-VRH mechanism though the fibers are 1D.

J. Mater. Chem., 2012, 22, 15665.

3. Fluorescence Polyaniline Nanotube

I have developed a new technique for synthesis fluorescence polyaniline nanotube. For that purpose we have used our synthesized highly fluorophore semiconducting dopant acid perylene tetracarboxylic acid. The synthesized compounds are fluorosent; optical, thermal and electrical property of the composite tuned by changing the dopant ratio and nature of dopant. The electrical mechanism of the composite was established by low temperature resistance measurement technique and it follow 1D-VRH mechanism

J. Mater. Chem., 2011, 21, 11098.

4. Polyaniline modified electrode for Ascorbic Acid Oxidation

I have synthesized a new kind of water soluble fluorescent polyaniline nanostructure using synthesized perylene disulphonic acid (PRSA) as a dopant acid. The synthesized polyaniline used as a highly active material for electrochemical oxidation of ascorbic acid (AA) up to micro mole level. For electrochemical oxidation of AA modified electrode was prepared by deposited dispersed polymer solution on ITO glass. So we are used first time the chemically synthesized polymer for electrochemical oxidation of polyaniline.

Publication

5. Polyaniline-Au Nanofibers for Non-volatile memory

I have successively synthesized high aspect ratio polyaniline-Au nanocomposite by in-situ polymerization method using HAuCl₄. Here HAuCl4 acts as a oxidizing agent as well as nano particle. The synthesized polyaniline shows a very good non-volatile memory effect up to several cycles. The sandwich device was fabricated by chemical vapor deposition of Al-electrode and another electrode is ITO electrode. We have also synthesized Ag, Pt, Pd nanoparticle doped polyaniline nanofibers for catalytic application as well as electronic application.

J. Am. Chem. Soc., 2012, 134, 6520.