Percolation transport in single-walled carbon nanotube films: experiment and simulation

Ant Ural; Ashkan Behnam; Jason Johnson; Yongho Choi

doi:10.1117/12.732878

25 September 2007 Percolation transport in single-walled carbon nanotube films: experiment and simulation

Ant Ural, Ashkan Behnam, Jason Johnson, Yongho Choi

Proceedings Volume 6769, Nanosensing: Materials, Devices, and Systems III; 67690B (2007) https://doi.org/10.1117/12.732878
Event: Optics East, 2007, Boston, MA, United States

Abstract

We present the scaling of percolation resistivity in nanotube films as a function of nanotube and device parameters both experimentally and using simulations. We first characterize the resistivity of these films down to 200 nm lateral dimensions by fabricating standard four-point-probe structures. We find that the film resistivity starts to increase at device widths below 20 microns, and exhibits an inverse power law dependence on width below a critical width of 2 microns. We then use quasi-3D Monte Carlo simulations to model and fit these experimental results. In addition to fitting the experimental data, we also study the effect of four parameters, namely nanotube density, length, alignment, and measurement direction on resistivity and its scaling with device width. We explain these simulation results by simple physical and geometrical arguments. Nanoscale study of percolation transport mechanisms in nanotube films is essential for understanding and characterizing their performance in nanosensing device applications.

Citation Download Citation

Ant Ural, Ashkan Behnam, Jason Johnson, and Yongho Choi "Percolation transport in single-walled carbon nanotube films: experiment and simulation", Proc. SPIE 6769, Nanosensing: Materials, Devices, and Systems III, 67690B (25 September 2007); https://doi.org/10.1117/12.732878

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available