Slowing DNA Translocation through a Nanopore Using a Functionalized Electrode
ACS Nano2013Vol. 7(11), pp. 10319–10326
Citations Over TimeTop 10% of 2013 papers
Padmini Krishnakumar, Brett Gyarfas, Weisi Song, Suman Sen, Peiming Zhang, Predrag Krstić, Stuart Lindsay
Abstract
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.
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