Open Access Nano Express

In situ–Directed Growth of Organic Nanofibers and Nanoflakes: Electrical and Morphological Properties

Roana Melina de Oliveira Hansen*, Morten Madsen, Jakob Kjelstrup-Hansen and Horst-Günter Rubahn

Author Affiliations

NanoSYD, Mads Clausen Institute, University of Southern Denmark, Alsion 2, 6400, Sønderborg, Denmark

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Nanoscale Res Lett 2011, 6:11  doi:10.1007/s11671-010-9758-z

Published: 25 August 2010

Abstract

Organic nanostructures made from organic molecules such as para-hexaphenylene (p-6P) could form nanoscale components in future electronic and optoelectronic devices. However, the integration of such fragile nanostructures with the necessary interface circuitry such as metal electrodes for electrical connection continues to be a significant hindrance toward their large-scale implementation. Here, we demonstrate in situ–directed growth of such organic nanostructures between pre-fabricated contacts, which are source–drain gold electrodes on a transistor platform (bottom-gate) on silicon dioxide patterned by a combination of optical lithography and electron beam lithography. The dimensions of the gold electrodes strongly influence the morphology of the resulting structures leading to notably different electrical properties. The ability to control such nanofiber or nanoflake growth opens the possibility for large-scale optoelectronic device fabrication.

Keywords:
Organic semiconductors; In situ growth; Organic nanofibers