Observed suppression of room temperature negative differential resistance in organic monolayers on Si(100)

N. P. Guisinger, R. Basu, M. E. Greene, A. S. Baluch, Mark C Hersam

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

The ultrahigh vacuum scanning tunnelling microscope was used to probe charge transport through two different organic monolayers adsorbed on the Si(100) substrate at room temperature. I - V measurements were taken on monolayers of 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) and cyclopentene for degenerately doped n-type and p-type substrates. Initial I - V measurements for transport through the TEMPO monolayer exhibited a suppression of negative differential resistance (NDR) relative to previously reported charge transport through isolated molecules. I - V measurements were also performed on isolated cyclopentene molecules and cyclopentene monolayers. Similarly to TEMPO monolayers, the cyclopentene monolayers exhibited attenuated NDR behaviour relative to isolated molecules. The observed NDR suppression suggests that the high packing density of organic monolayers influences charge transport through molecule-semiconductor junctions.

Original languageEnglish
JournalNanotechnology
Volume15
Issue number7
DOIs
Publication statusPublished - Jul 2004

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Monolayers
Cyclopentanes
retarding
room temperature
molecules
Charge transfer
Molecules
semiconductor junctions
Temperature
packing density
ultrahigh vacuum
Semiconductor junctions
microscopes
Ultrahigh vacuum
Substrates
scanning
probes
Microscopes
Scanning

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Observed suppression of room temperature negative differential resistance in organic monolayers on Si(100). / Guisinger, N. P.; Basu, R.; Greene, M. E.; Baluch, A. S.; Hersam, Mark C.

In: Nanotechnology, Vol. 15, No. 7, 07.2004.

Research output: Contribution to journalArticle

Guisinger, N. P. ; Basu, R. ; Greene, M. E. ; Baluch, A. S. ; Hersam, Mark C. / Observed suppression of room temperature negative differential resistance in organic monolayers on Si(100). In: Nanotechnology. 2004 ; Vol. 15, No. 7.
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