Slowing DNA translocation through a nanopore using a functionalized electrode

Padmini Krishnakumar, Brett Gyarfas, Weisi Song, Suman Sen, Peiming Zhang, Predrag Krstić, Stuart Lindsay

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


Nanopores were fabricated with an integrated microscale Pd electrode coated with either a hydrogen-bonding or hydrophobic monolayer. Bare pores, or those coated with octanethiol, translocated single-stranded DNA with times of a few microseconds per base. Pores functionalized with 4(5)-(2-mercaptoethyl)-1H- imidazole-2-carboxamide slowed average translocation times, calculated as the duration of the event divided by the number of bases translocated, to about 100 μs per base at biases in the range of 50 to 80 mV.

Original languageEnglish (US)
Pages (from-to)10319-10326
Number of pages8
JournalACS nano
Issue number11
StatePublished - Nov 26 2013


  • DNA sequencing
  • DNA translocation
  • nanopore
  • recognition tunneling
  • slowing translocation

ASJC Scopus subject areas

  • General Materials Science
  • General Engineering
  • General Physics and Astronomy


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