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Issue 30, 2016

Tapered carbon nanocone tips obtained by dynamic oxidation in air

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Abstract

Carbon nanocones (CNCs) are conical and seamless microstructures formed by curved multiple-walled graphene layers. CNCs may be used as a kind of novel and stable atomic force microscopy (AFM) tips because of their unique conical shape and high stability. However, the relatively dull multi-walled apex structure hinders the above practical application. Here, we present an approach to sharpen the CNC tip structure to make the material more appropriate for AFM applications. Simply by oxidization in air under optimized conditions, tapered nanocone tips can be obtained. It is notable that no additional structural defects or amorphous carbon impurities were generated after the oxidation process. The sharpened CNCs are believed to be excellent AFM tips with a superb spatial resolution and high stability. Moreover, based on the step-shaped structures in the sidewalls of the processed CNCs, a possible oxidation mechanism is discussed.

Graphical abstract: Tapered carbon nanocone tips obtained by dynamic oxidation in air

Supplementary files

Article information


Submitted
02 Dec 2015
Accepted
29 Feb 2016
First published
08 Mar 2016

RSC Adv., 2016,6, 25541-25548
Article type
Paper

Tapered carbon nanocone tips obtained by dynamic oxidation in air

W. Huang, J. Xu and X. Lu, RSC Adv., 2016, 6, 25541 DOI: 10.1039/C5RA25667D

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