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Controlled growth of well-aligned carbon nanotubes, electrochemical modification and improving with electrodeposited less-common gold nanostructures
Paper ID : 2232-UFGNSM13-FULL (R1)
Authors:
Abstract:
An efficient method has been developed to synthesize well-aligned multi-walled carbon nanotubes (MWCNTs) on a conductive Ta substrate by chemical vapour deposition. Free-standing MWCNTs arrays were functionalized through electrochemical oxidation with the formation of hydroxyl and carboxyl functional groups. Using a new oven drying technique, we demonstrate that the unidirectionally aligned geometry of the CNT arrays can be retained after being subjected to each step of electrochemical modification. Useful electrochemical methods for the synthesis of various gold nanostructures onto the aligned MWCNTs was then presented for the first time. The results demonstrated that flowerlike nanoparticle arrays, nanosheets and nanoflowers were obtained on the aligned CNTs under different experimental conditions. These kinds of aligned-CNT/Au nanostructures hybrid materials could lead to development of a new generation device for ultrasensitive catalytic and biological application.
Keywords:
Chemical vapour deposition, vertically aligned carbon nanotube, electrochemical techniques, nanostructures, nanoflowers
Status : Paper Accepted (Poster Presentation)