Kasumov A Y, Kociak M, Guéron S, Reulet B, Volkov V T, Klinov D V, Bouchiat H
Laboratoire de Physique des Solides, Associé au CNRS, Bât 510, Université Paris-Sud, 91405, Orsay, France.
Science. 2001 Jan 12;291(5502):280-2. doi: 10.1126/science.291.5502.280.
Conductivity measurements on double-stranded DNA molecules deposited by a combing process across a submicron slit between rhenium/carbon metallic contacts reveal conduction to be ohmic between room temperature and 1 kelvin. The resistance per molecule is less than 100 kilohm and varies weakly with temperature. Below the superconducting transition temperature (1 kelvin) of the contacts, proximity-induced superconductivity is observed. These results imply that DNA molecules can be conducting down to millikelvin temperature and that phase coherence is maintained over several hundred nanometers.
通过梳理过程将双链DNA分子沉积在铼/碳金属接触之间的亚微米狭缝上进行电导率测量，结果表明在室温至1开尔文之间传导是欧姆性的。每个分子的电阻小于100千欧，并且随温度变化较弱。在接触的超导转变温度（1开尔文）以下，观察到邻近诱导的超导性。这些结果意味着DNA分子在低至毫开尔文温度下仍能导电，并且相位相干性在几百纳米范围内得以维持。
