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Large Area-Aligned Arrays from Direct Deposition of Single-Wall Carbon Nanotube Inks

Summary: Large Area-Aligned Arrays from Direct Deposition of Single-Wall Carbon
Nanotube Inks
Trevor J. Simmons,, Daniel Hashim, Robert Vajtai, and Pulickel M. Ajayan*,
Department of Material Science & Engineering, Department of Chemistry & Chemical Biology, and Rensselaer
Nanotechnology Center, Rensselaer Polytechnic Institute, 110 Eighth Street, Troy, New York 12180
Received May 24, 2007; E-mail: simmot@rpi.edu
In this work we disperse pristine single-wall carbon nanotubes
(SWNTs) in water by noncovalent modification of the tube surfaces
with polymer and surfactant, aided by brief low-power sonication.
Some of the advantages of this method are that it avoids damaging
the SWNTs substantially, maintains very long SWNTs (several
micrometers), and yields high concentrations of SWNTs dispersed
in water. These dispersions can be deposited in a variety of methods
onto substrates such as silica, glass, and alumina. During thermal
deposition, unique arrays of well-aligned SWNTs self-assemble
across large fissures and once dry are observed by scanning electron
microscopy (SEM).
SWNTs have unique electronic and mechanical properties which
show promise in a wide variety of applications.1,2 One major hurdle
in advancing toward such applications is the difficulty in suspending


Source: Ajayan, Pulickel M. - Department of Mechanical Engineering and Materials Science, Rice University


Collections: Materials Science