1063-7397/03/3202- $25.00 © 2003 MAIK “Nauka /Interperiodica”
Russian Microelectronics, Vol. 32, No. 2, 2003, pp. 79–81. Translated from Mikroelektronika, Vol. 32, No. 2, 2003, pp. 102–104.
Original Russian Text Copyright © 2003 by Bobrinetskii, Nevolin, Petrik, Chaplygin.
One avenue of research in nanoelectronics is con-
cerned with the creation of quasi-one-dimensional
structures, also known as quantum wires. A two-staged
approach is usually followed. In the ﬁrst stage, array
chips are produced by conventional technologies,
although pushed to their limits. In the second stage,
quantum wires are formed on the chips in one way or
another. Planar quantum-wire microcontacts that are
formed with an atomic-force microscope by local
anodic oxidation of titanium strips show a multiplicity
of current–voltage characteristics . However, the
rough surface of a quantum-wire conductor is responsi-
ble for the broadening of carrier energy levels associ-
ated with a transverse direction.
It appears promising to make quantum wires from
carbon nanotubes, which have negligible surface
roughness. Initially this approach suffered from two
drawbacks: the considerable contact resistance
between nanotubes and electrodes and the low conduction
of nanotubes. IBM specialists were probably the ﬁrst to
successfully tackle these problems; they demonstrated a
nanotransistor with gold electrodes and a carbon nanotube
. High-conductivity nanotubes are usually made by
doping the material with metal atoms. Also note that bend-
ing alters the conductance of the nanotube.
The purpose of this work was to create planar two-
electrode nonlinear elements in carbon nanotubes, opti-
mized for conductance and limiting current.
Current–Voltage Characteristics of Two-Electrode Elements
with Carbon Nanotubes
I. I. Bobrinetskii*, V. K. Nevolin*, V. I. Petrik**, and Yu. A. Chaplygin*
* Moscow Institute of Electronic Engineering (Technical University), Moscow, 103498 Russia
** Research Institute of Physics of Fullerenes and Related Materials, Russian Academy of Natural Sciences,
ul. Vorontsovskaya 21a-1, Moscow, 109147 Russia
Received June 19, 2002
—Planar two-electrode nonlinear elements using carbon nanotubes doped with platinum metals are
created and investigated. Among the nanotubes, branched ones are found. If doped, these nanotubes take a reg-
ular form. With appropriate doping, limiting currents above 1
A are achieved. However, the problem of contact
between carbon nanotubes and electrodes has yet to be solved.
0 200 400 600 800 1000 1200 1400 nm
Palladium-doped bifurcate nanotube on a gold substrate.
MICRO- AND NANODEVICES