Facile Deposition of Gold Nanostructures on Polyaniline under Electrochemical Control

R.M. West, S. Semancik
National Institute of Standards and Technology, US

Keywords: conducting polymers, gold nanostructures, electrochemistry, SERS

Summary:

The synthesis and optimization of polyaniline-gold nanocomposites is carried out under electrochemical control. The effect polyaniline thickness, dopant, gold salt concentration and applied potential on film morphology and SERS activity is investigated. It is shown that a unique potential step program, i.e. stepping the potential between 0.4 V and -0.2 V repeatably, leads to facile control over the final gold nanostructure. An in-house fabricated 16-channel electrode array is utilized to efficiently optimize the nanocomposite morphology.