Controlled dielectrophoretic assembly of carbon nanotubes using real-time electrical detection

abstract

• We investigate dielectrophoretic deposition of single-walled carbon nanotubes using an in situ detection system. Pairs of electrodes are stimulated with a small-amplitude, low-frequency voltage superimposed on a large-amplitude, high-frequency dielectrophoretic voltage. Measuring the magnitude of the current both at dc (Idc) and at the low frequency (Iac) through a digital lock-in technique allows us to determine when a nanotube has made electrical contact and to halt the dielectrophoretic process. Because Idc is determined by nonlinearities in the device current-voltage characteristic, measurement of the Idc / Iac ratio allows the real-time determination of whether the deposited nanotube is metallic or semiconducting. 2009 American Institute of Physics.

authors

• Banerjee, Sarbajit

published proceedings

• Applied Physics Letters

author list (cited authors)

• Sorgenfrei, S., Meric, I., Banerjee, S., Akey, A., Rosenblatt, S., Herman, I. P., & Shepard, K. L.

citation count

• 19

complete list of authors

• Sorgenfrei, Sebastian||Meric, Inanc||Banerjee, Sarbajit||Akey, Austin||Rosenblatt, Sami||Herman, Irving P||Shepard, Kenneth L

publication date

• February 2009

publisher

• AIP Publishing  Publisher

published in

• Applied Physics Letters  Journal

Digital Object Identifier (DOI)

• 10.1063/1.3077620

start page

• 053105

end page

• 053105

volume

• 94

issue

• 5

URL

• http://dx.doi.org/10.1063/1.3077620