The fabrication and characterization of adjustable nanogaps between gold electrodes on chip for electrical measurement of single molecules

Jing Hua Tian, Yang Yang, Bo Liu, Bernd Schöllhorn, De Yin Wu, Emmanuel Maisonhaute, Anna Serra Muns, Yong Chen, Christian Amatore, Nongjian Tao, Zhong Qun Tian

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33 Scopus citations

Abstract

This work reports on a new method to fabricate mechanically controllable break junctions (MCBJ) with finely adjustable nanogaps between two gold electrodes on solid state chips for characterizing electron transport properties of single molecules. The simple, low cost, robust and reproducible fabrication method combines conventional photolithography, chemical etching and electrodeposition to produce suspended electrodes separated with nanogaps. The MCBJ devices fabricated by the method can undergo many cycles in which the nanogap width can be precisely and repeatedly varied from zero to several nanometers. The method improves the success rate of the MCBJ experiments. Using these devices the electron transport properties of a typical molecular system, commercially available benzene-1,4-dithiol (BDT), have been studied. The I V and GV characteristic curves of BDT and the conductance value for a single BDT molecule established the excellent device suitability for molecular electronics research.

Original languageEnglish (US)
Article number274012
JournalNanotechnology
Volume21
Issue number27
DOIs
StatePublished - Jul 1 2010

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ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

Tian, J. H., Yang, Y., Liu, B., Schöllhorn, B., Wu, D. Y., Maisonhaute, E., Muns, A. S., Chen, Y., Amatore, C., Tao, N., & Tian, Z. Q. (2010). The fabrication and characterization of adjustable nanogaps between gold electrodes on chip for electrical measurement of single molecules. Nanotechnology, 21(27), [274012]. https://doi.org/10.1088/0957-4484/21/27/274012