Mtsuko, D and Avnon, A and Lievonen, J and Ahlskog, M and Menon, Rajalakshmi K (2008) Electrochemical deposition of polypyrrole nanolayers on discontinuous ultrathin gold films. In: Nanotechnology, 19 (12). 125304-1-125304-6.
Ultrathin layers of polypyrrole (PPy) were electrochemically grown between microelectrodes on a $Si/SiO_2$ substrate. Conducting nanolayers of PPy are directly grown onto ultrathin discontinuous gold (Au) film between the microelectrodes, with thicknesses in the range 10–100 nm. The system therefore forms a novel (PPy/Au) nanocomposite conductor. Atomic force microscopy (AFM) imaging and conductivity measurements indicate that at all thicknesses a relatively uniform film is formed but with significant roughness that reflects the roughness of the metallic island layer. In PPy/Au films with thickness $\sim 10 nm$, the small barriers around the gold islands dominate the conduction, and as the film thickness increases to 100 nm the intrinsic conductivity of highly doped PPy dominates the charge transport.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to Institute of Physics.|
|Department/Centre:||Division of Physical & Mathematical Sciences > Physics|
|Date Deposited:||25 Sep 2008 11:31|
|Last Modified:||19 Sep 2010 04:49|
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