The modification of the electrical property in double-walled carbon nanotube devices with a self-assembled monolayer of molecules

Eun Kyoung Jeon, Hyo Suk Kim, Byoung Kye Kim, Ju Jin Kim, Jeong O. Lee, Cheol Jin Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We have investigated the electrical transports of double-walled carbon nanotube field effect transistors (DWNT-FETs) with modified contacts. The CNT/Au metal contacts of DWNT-FETs were modified with a self-assembled monolayer of 2-aminoethanethiol molecules. In ambient air, the contact-modified DWNT-FETs showed a decreased conductance in the p-channel (negative gate voltages) and an increased conductance in the n-channel (positive gate voltages), while the original device showed p-type transport. In a vacuum, the n-channel current in the contact-modified DWNT-FET started to rise. We observed a clear n-type transport in the high vacuum. Almost no changes in the gate threshold voltages were observed by means of the contact-modification with a self-assembled monolayer. While the semiconducting DWNT-FET showed a clear transition from a p-type to n-type transistor with contact modification, no apparent changes were observed in semimetallic DWNT devices.

Original languageEnglish
Pages (from-to)4349-4352
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Volume8
Issue number9
DOIs
Publication statusPublished - 2008 Sep 1

Fingerprint

Carbon nanotube field effect transistors
Carbon Nanotubes
Self assembled monolayers
Carbon nanotubes
Electric properties
carbon nanotubes
electrical properties
field effect transistors
Equipment and Supplies
Molecules
molecules
Vacuum
Cysteamine
Electric potential
Threshold voltage
Contacts (fluid mechanics)
electric potential
high vacuum
Transistors
threshold voltage

Keywords

  • Carbon nanotube
  • Field effect transistor
  • Schottky barrier
  • Self-assembled monolayer

ASJC Scopus subject areas

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

Cite this

The modification of the electrical property in double-walled carbon nanotube devices with a self-assembled monolayer of molecules. / Jeon, Eun Kyoung; Kim, Hyo Suk; Kim, Byoung Kye; Kim, Ju Jin; Lee, Jeong O.; Lee, Cheol Jin.

In: Journal of Nanoscience and Nanotechnology, Vol. 8, No. 9, 01.09.2008, p. 4349-4352.

Research output: Contribution to journalArticle

Jeon, Eun Kyoung ; Kim, Hyo Suk ; Kim, Byoung Kye ; Kim, Ju Jin ; Lee, Jeong O. ; Lee, Cheol Jin. / The modification of the electrical property in double-walled carbon nanotube devices with a self-assembled monolayer of molecules. In: Journal of Nanoscience and Nanotechnology. 2008 ; Vol. 8, No. 9. pp. 4349-4352.
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