Palladium electrodes for molecular tunnel junctions

Shuai Chang, Suman Sen, Peiming Zhang, Brett Gyarfas, Brian Ashcroft, Steven Lefkowitz, Hongbo Peng, Stuart Lindsay

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Gold has been the metal of choice for research on molecular tunneling junctions, but it is incompatible with complementary metal-oxide-semiconductor fabrication because it forms deep level traps in silicon. Palladium electrodes do not contaminate silicon, and also give higher tunnel current signals in the molecular tunnel junctions that we have studied. The result is cleaner signals in a recognition-tunneling junction that recognizes the four natural DNA bases as well as 5-methyl cytosine, with no spurious background signals. More than 75% of all the recorded signal peaks indicate the base correctly.

Original languageEnglish (US)
Article number425202
Issue number42
StatePublished - Oct 26 2012

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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