Inelastic electron tunneling spectroscopy of an alkane SAM

Author

Wang, Wenyong ; Lee, Takhee ; Kretzschmar, Ilona ; Reed, Mark A.

Author_Institution

Dept. of Electr. Eng., Yale Univ., New Haven, CT, USA

fYear

2004

fDate

16-19 Aug. 2004

Firstpage

270

Lastpage

272

Abstract

Inelastic electron tunneling spectroscopy (IETS) of an alkanedithiol self-assembled monolayer (SAM) is investigated using a nanometer scale device. The IETS spectrum of the octanedithiol device clearly shows vibrational signatures of an octanedithiolate, -SC8 H16S-, bonded to gold electrodes. The pronounced IETS peaks correspond to vibrational modes perpendicular to the junction interface, which include the stretching modes of Au-S (at 33 mV) and C-C (at 133 mV), and wagging mode of CH2 (at 158 mV). The observed peak intensities and peak widths are in good agreement with theoretical predictions.

Keywords

electrical conductivity; gold; molecular electronics; monolayers; organic compounds; self-assembly; tunnelling spectra; vibrational modes; 133 mV; 33 mV; Au; IETS; alkane SAM; alkanedithiol self-assembled monolayer; gold electrodes; inelastic electron tunneling spectroscopy; junction interface; nanometer scale device; octanedithiol device; octanedithiolate; stretching modes; vibrational modes; vibrational signatures; wagging mode; Bonding; Electrons; Extraterrestrial measurements; Fabrication; Gold; Nanoscale devices; Physics; Spectroscopy; Temperature measurement; Tunneling;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanotechnology, 2004. 4th IEEE Conference on

Print_ISBN

0-7803-8536-5

Type

conf

DOI

10.1109/NANO.2004.1392320

Filename

1392320