Optical visualization of individual ultralong carbon nanotubes by chemical vapour deposition of titanium dioxide nanoparticles

Rufan Zhang, Yingying Zhang (), Qiang Zhang, Huanhuan Xie, Haidong Wang, Jingqi Nie, Qian Wen and Fei Wei ()
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Rufan Zhang: Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Tsinghua University
Yingying Zhang: Center for Nano and Micro Mechanics, Tsinghua University
Huanhuan Xie: Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Tsinghua University
Haidong Wang: Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, School of Aerospace, Tsinghua University
Jingqi Nie: Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Tsinghua University
Qian Wen: Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Tsinghua University
Fei Wei: Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Tsinghua University

Nature Communications, 2013, vol. 4, issue 1, 1-7

Abstract: Abstract Direct visualization and manipulation of individual carbon nanotubes in ambient conditions is of great significance for their characterizations and applications. However, the observation of individual carbon nanotubes usually requires electron microscopes under high vacuum. Optical microscopes are much more convenient to be used, yet their resolution is low. Here we realize the visualization and manipulation of individual ultralong carbon nanotubes under optical microscopes by deposition of TiO2 nanoparticles on them. The strong scattering of TiO2 nanoparticles to visible light renders them visible by optical microscopes. Micro-Raman-spectroscopy measurement of individual carbon nanotubes is greatly facilitated by their optical visualization. With the assistance of TiO2 nanoparticles, individual carbon nanotubes can be easily manipulated under an optical microscope at macroscopic scale and in ambient conditions. Based on our approach, various manipulation of ultralong carbon nanotubes, including cutting, transfer, fabrication of structures/devices and pulling out inner shells of multiwalled carbon nanotubes, are demonstrated.

Date: 2013
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DOI: 10.1038/ncomms2736

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