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| Title: | ASSEMBLY AND APPLICATION OF CARBON NANOTUBE FIBRILS WITH CONTROLLED AND VARIABLE LENGTHS BY DIELECTROPHORESIS | |
| DOI No: | 10.1142/9789812701879_0023 | |
| Source: | CLUSTERS AND NANO-ASSEMBLIES (pp 193-198) | |
| Author(s): | JIE TANG
Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599, USA National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan GUANG YANG Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599, USA JIAN ZHANG Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599, USA HUAIZHI GENG Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599, USA BAO GAO Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599, USA LU-CHANG QIN Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599, USA OTTO ZHOU Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599, USA ORLIN D. VELEV Department of Chemical Engineering, North Carolina State University, Raleigh, NC 27695, USA |
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| Abstract: | In this paper we show that dielectrophoresis can be utilized as a general approach for guided-assembly of hierarchical structures of one-dimensional nano-materials. As a demonstration, pre-formed carbon nanotubes (CNTs) were assembled into sub-micron diameter fibrils anchored on a metal tip by dielectrophoresis. This method affords fine control of the fibril length and the potential for parallel processing. The CNTs within the fibril are bonded by van der Waals forces and are aligned along the fibril axis. The fibrils with 1~20 μm in length are sufficiently stiff for use as scanning probe microscope probes. Longer fibrils have also been drawn from the liquid. The fibrils are also stable electron field emitters. | |
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