Study on Vertical Alignment of Carbon Nanotubes using AFM and SEM

Singh, Sudhanshu and Bharadwaj, L.M. and Mahna, S.K. and Kaur, Inderpreet and Garg, Sumita (2012) Study on Vertical Alignment of Carbon Nanotubes using AFM and SEM. Research Journal of Chemistry and Environment, 16 (4). pp. 51-53. ISSN 0972-0626

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In recent years, carbon nanotubes (CNTs) have attracted and continue to attract considerable interest in a wide variety of scientific files. Especially well-arrayed CNTs are highly desired to prepare chemical sensors, nanoprobes for scanning probe microscopy, field emitter devices. We performed the vertical alignment of single-walled carbon nanotubes (SWNTs) in silica, mica and glass surfaces. CNTs have been functionalized successfully using microwave method, conventional sonication method and we found out that sonication was the better technique among all of them and was confirmed by Fourier Transform Infrared Microscopy (FTIR). For chemical reaction with chemical modified glass surface, the carboxylic acid groups were converted into acid chloride groups followed by the chemical reaction with chemically functionalized surfaces. Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM) results show the vertically aligned SWNTs and the distribution of the vertically aligned SWNTs becomes denser as reaction time increases. Alignment of the shorter nanotubes on the substrate increases with increase of reaction time (e.g. SWNTs of length 0.5 to 2μm are easier to align than the SWNTs of length 200μm). So we conclude that SWNTs are vertically aligned on chemically functionalized glass substrate by controlling chemical reactivity. Tall and smaller diameter CNTs are difficult to align on substrate without support of neighbouring Carbon Nanotubes.

Item Type: Article
Subjects: CSIO > Nano Science and Nano Technology
Divisions: Nano Science and Nano Technology
Depositing User: Ms. J Shrivastav
Date Deposited: 04 Feb 2013 04:27
Last Modified: 04 Feb 2013 04:27

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