Abstract
Brushes are common tools for use in industry and our daily life, performing a variety of tasks such as cleaning, scraping, applying and electrical contacts. Typical materials for constructing brush bristles include animal hairs, synthetic polymer fibres and metal wires (see, for example, ref. 1). The performance of these bristles has been limited by the oxidation and degradation of metal wires, poor strength of natural hairs, and low thermal stability of synthetic fibres. Carbon nanotubes2,3, having a typical one-dimensional nanostructure, have excellent mechanical properties, such as high modulus and strength4,5,6, high elasticity and resilience7, thermal conductivity8 and large surface area (50ā200 m2 gā1)9. Here we construct multifunctional, conductive brushes with carbon nanotube bristles grafted on fibre handles, and demonstrate their several unique tasks such as cleaning of nanoparticles from narrow spaces, coating of the inside of holes, selective chemical adsorption, and as movable electromechanical brush contacts and switches. The nanotube bristles can also be chemically functionalized for selective removal of heavy metal ions.
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Acknowledgements
We thank R. Geier, G. Viswanathan and S. Kar for helpful discussions. This research was supported by the Focus Center New York for Electronic Interconnects and the National Science Foundation Nanoscale Science and Engineering Center for the directed assembly of nanostructures. V. Veedu and M. Nejhad acknowledge the support of ADPICAS project by the Office of Naval Research under the government grant number of N00014-00-1-0692.
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Cao, A., Veedu, V., Li, X. et al. Multifunctional brushes made from carbon nanotubes. Nature Mater 4, 540ā545 (2005). https://doi.org/10.1038/nmat1415
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DOI: https://doi.org/10.1038/nmat1415
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