Nanoscale functionalization of surfaces by graft-through Sonogashira polymerization

Abstract

Graft through Sonogashira polymerization was used to functionalize various surfaces with conjugate polymers in a dimension of less than 100 nm. Atomic force microscopy measurement revealed a dense surface coverage with several closely packed islands. UV-vis spectroscopy and cyclic voltammetry measurements suggested a moderate band gap, which is important for various applications in material science. A device was fabricated using polymer functionalized ITO and deposited aluminium as cathode to determine the current–voltage (I–V) characteristics and charge carrier mobility. Space charge limited current method indicated moderate charge carrier mobility while I–V characteristic data indicated a behaviour as semiconducting material.