Palladium electrodes for molecular tunnel junctions

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

doi:10.1088/0957-4484/23/42/425202

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 journal › Article › peer-review

14 Scopus citations

Abstract

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 language	English (US)
Article number	425202
Journal	Nanotechnology
Volume	23
Issue number	42
DOIs	https://doi.org/10.1088/0957-4484/23/42/425202
State	Published - Oct 26 2012

ASJC Scopus subject areas

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

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AU - Chang, Shuai

AU - Sen, Suman

AU - Zhang, Peiming

AU - Gyarfas, Brett

AU - Ashcroft, Brian

AU - Lefkowitz, Steven

AU - Peng, Hongbo

AU - Lindsay, Stuart

PY - 2012/10/26

Y1 - 2012/10/26

N2 - 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.

AB - 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.

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Palladium electrodes for molecular tunnel junctions

Abstract

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