title: Palladium electrodes for molecular tunnel junctions.
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.
authors.affiliation: Biodesign Institute, Arizona State University, Tempe, AZ 85287, USA.
authors.forename: Shuai
authors.initials: S
authors.lastname: Chang
authors.forename: Suman
authors.initials: S
authors.lastname: Sen
authors.forename: Peiming
authors.initials: P
authors.lastname: Zhang
authors.forename: Brett
authors.initials: B
authors.lastname: Gyarfas
authors.forename: Brian
authors.initials: B
authors.lastname: Ashcroft
authors.forename: Steven
authors.initials: S
authors.lastname: Lefkowitz
authors.forename: Hongbo
authors.initials: H
authors.lastname: Peng
authors.forename: Stuart
authors.initials: S
authors.lastname: Lindsay
mesh_terms: D004560:Electricity; D055664:Electrochemical Techniques / Q000379:methods*; D004566:Electrodes; D010165:Palladium / Q000737:chemistry*; D012815:Signal Processing, Computer-Assisted
chemical_list: D010165:Palladium