J Nanosci Nanotechnol. 2010 Aug;10(8):5302-6. doi: 10.1166/jnn.2010.2399.

Preparation of poly(1,5 diamino naphthalene) nanobelts/nanodiscs through a "hard-soft combined templates" approach.

Journal of nanoscience and nanotechnology

Shanmugasundaram Komathi, Subramanian Palaniappan, Paramasivam Manisankar, Anantha Iyengar Gopalan, Kwang-Pill Lee

PMID: 21125886 DOI: 10.1166/jnn.2010.2399

Abstract

This is the first report on the preparation of nanobelts/nanodiscs of poly(1,5-diamino naphthalene) (PDAN-P) in bulk quantities through a "hard-soft combined templates" approach. PDAN was nanostructured within the channels of MCM-41 (hard template) in the presence of beta-napthalene sulfonic acid (beta-NSA) (soft template) and further used as the seed for the bulk preparation of pure PDAN nanobelts/nanodiscs of PDAN (PDAN-P). Field emision scanning electron microscope image reveals that a typical nanobelt has a length of approximately 3 microm, with a uniform breadth of approximately 150 nm and a thickness of approximately 50 nm. UV-Visible spectrum reveals that the electronic features of PDAN-P are different from PDAN prepared by conventional method (PDAN-C). The electrochemical and interfacial characteristics of PDAN-P were evaluated by cyclic voltammetry and impedance spectroscopy and compared with PDAN-C. The current density characteristics of ITO/PDAN-P and ITO/PDAN-C were also compared. The potential for the onset of current and the current densities beyond the onset potentials were higher at ITO/PDAN-P than for ITO/PDAN-C. Results from electrochemical imedance spectroscopy informed that the ac conductivity of PDAN-P is higher than PDAN-C. Thus, PDAN-P exhibits distinctly different electronic and electrochemical characteristics as compared to PDAN-C.

Publication Types

• Journal Article
• Research Support, Non-U.S. Gov't