Nanotech 2012 Vol. 1
Nanotech 2012 Vol. 1
Nanotechnology 2012: Advanced Materials, CNTs, Particles, Films and Composites (Volume 1)

Polymer Nanotechnology Chapter 7

Electrosynthesis of Intrinsically Conducting Polymers/Silicon Nanocomposites: Formation Mechanism and Optical Properties

Authors: F.A. Harraz, A.M. Salem

Affilation: Central Metallurgical R&D Institute (CMRDI), Egypt

Pages: 632 - 635

Keywords: porous silicon, conducting polymers, electrochemical technique, optical properties

When a silicon wafer is subjected to electrochemical etching in fluoride-based solution, silicon surface develops pores, often called porous silicon (PSi). A variety of pore sizes ranging from a few nanometers up to a few micrometers can be obtained during the etching process. In this study, we extended our previous works to electro-polymerize various conducting polymers, including polypyrrole (PPy), polyaniline (PA) and polythiophene (PT) into PSi templates. MEH-PPV polymer was also tested for filling the PSi matrix using the spin coating technique. The main objective of this study is to fill completely the PSi with conducting polymers with an ultimate goal to fabricate a novel nanocomposite with improved electrical and optical properties. Another objective is to understand the distribution and filling mechanism of polymer inside the nanopores. Our findings revealed that the deposition of polymer proceeds homogeneously inside the nanopores, starting from the pore bottom and propagates into the outer surface. Electrical and optical properties of as-synthesized nanocomposites were significantly enhanced. Such hybrid nanostructures could be beneficial to current and future technologies based on conducting polymers, including for example, photovoltaic device and sensing applications. Results of fabrication and characterization will be addressed and thoroughly discussed during the conference.

ISBN: 978-1-4665-6274-5
Pages: 804
Hardcopy: $209.95