Dielectrophoretic deposition of graphite oxide soot particles

Seunghyun Hong, Sehun Jung, Sunjung Kang, Youngjin Kim, Xinqi Chen, Sasha Stankovich, S. Rodney Ruoff, Seunghyun Baik*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Alternating current dielectrophoresis in water was used to position graphite oxide soot (GO-soot) particles generated by rapid thermal expansion of graphite oxide under inert gas. The dielectrophoretic deposition was carried out at a frequency of 10 MHz and a peak-to-peak voltage of 10 V, and the deposited particles were analyzed using scanning electron microscopy. The vertical cross section, obtained by focused ion beam cutting, shows the wrinkled layers of the GO-soot particles and cavities between the layers. The electrical transport measurements show typical characteristics of metal-like pathways. The improved electrical contact between electrodes and GO-soot, probably due to the thin platelet structure of GO-soot, makes the material favorable for electrical device applications. The results demonstrate that AC dielectrophoresis can be used to selectively deposit graphite oxide soot particles at desired locations.

Original languageEnglish (US)
Pages (from-to)424-427
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Volume8
Issue number1
DOIs
StatePublished - Jan 2008

Keywords

  • Dielectrophoresis
  • Electrical transport measurement
  • Graphite oxide soot
  • Positioning

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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