Hostname: page-component-cd9895bd7-gvvz8 Total loading time: 0 Render date: 2024-12-27T01:58:47.505Z Has data issue: false hasContentIssue false
  • English
  • Français

A Continuous Flow Device for the Purification of Semiconducting Nanoparticles by AC Dielectrophoresis

Published online by Cambridge University Press:  08 September 2014

Rustin Golnabi ,
Su (Ike) Chih Chi ,
Stephen L. Farias  and
Robert C. Cammarata
Rustin Golnabi
Affiliation:
Department of Materials Science and Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, Maryland 21218, USA
Su (Ike) Chih Chi
Affiliation:
Department of Materials Science and Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, Maryland 21218, USA
Stephen L. Farias
Affiliation:
Department of Materials Science and Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, Maryland 21218, USA
Robert C. Cammarata
Affiliation:
Department of Materials Science and Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, Maryland 21218, USA Department of Mechanical Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, Maryland 21218, USA
Get access

Abstract

Single-walled carbon nanotubes (SWCNTs) have attracted significant attention as building blocks for future nanoscale electronics due to their small size and unique electronic properties. However, current SWCNT production techniques generate a mixture of two types of nanotubes with divergent electrical behaviors due to structural variations. Some of the nanotubes act as metallic materials while others display semiconducting properties. This random mixture has prevented the realization of functional carbon nanotube-based nanoelectronics. Here, a method of purifying a continuous flow of semiconducting nanotubes from an initially random mixture of both metallic and semiconducting SWCNTs in suspension is presented. This purification uses A/C dielectrophoresis (DEP), and takes advantage of the large difference of the relative dielectric constants between metallic and semiconducting SWCNTs. Because of a difference in magnitude and opposite directions of a dielectrophoretic force imposed on the random SWCNT solution, metallic SWCNTs deposit onto an electrode while semiconducting SWCNTs remain in suspension [3]. A discussion of these techniques is presented, along with a dielectrophoretic force-utilized microfluidic lab-on-a-chip device that can accomplish purification of semiconducting nanoparticles at high processing rates. The effectiveness of the device is characterized using Raman spectroscopy analysis on separated samples.

Keywords

Csemiconductingpurification
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1700: Symposium MM – Nanotubes and Related Nanostructures--2014 , 2014 , pp. 85 - 90
Copyright
Copyright © Materials Research Society 2014 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Avouris, P., Physics World 20, 40–45 (2007).CrossRefGoogle Scholar
Avouris, P., and Appenzeller, J., The Industrial Physicist, June/July 2004, American Institute of Physics.Google Scholar
Krupke, R., et al. ., Science 301, 344–347 (2003).CrossRefGoogle Scholar
Peng, N., et al. ., J. Appl. Phys. 100, 024309 (2006).CrossRefGoogle Scholar
Talapin, D.V., Lee, J.S., Kovalenko, M.V., and Shevchenko, E.V., Chem. Rev. 110(1), 389–459 (2010)CrossRefGoogle Scholar
Allen, B. L., Kichambare, P. D., and Star, A., Advanced Materials 19(11), 1439–1451 (2007).CrossRefGoogle Scholar
Liong, M., et al. ., ACS Nano 2(5), 889–896 (2008).CrossRefGoogle Scholar
Berber, S., Kwon, Y-K., and Tománek, D, Phys. Rev. Lett. 84, 4613 (2000).CrossRefGoogle Scholar
Yao, N., and Lordi, V., J. Appl. Phys. 84, 1939 (1998).CrossRefGoogle Scholar
Jin, S.H., Nature Nanotechnology 8, 347–355 (2013).CrossRefGoogle Scholar
Arnold, M.S., et al. ., Nature Nanotechnology 1, 60–65 (2006).CrossRefGoogle Scholar
Krupke, R., et al. ., Nano Lett. 3, 1019–1023 (2003).CrossRefGoogle Scholar
Liu, H., et al. ., Nature Comm. 2, (2011).Google Scholar
Krupke, R., et al. ., Nano Lett. 4, 1395–1399 (2004).CrossRefGoogle Scholar
Yang, F., et al. ., Nature 510, 522–524 (2014).CrossRefGoogle Scholar