Siwy, Z. S. and Powell, M. R. and Kalman, E and Astumian, R. D. and Eisenberg, Robert S. (2006) Negative incremental resistance induced by calcium in asymmetric nanopores. NANO LETTERS, 6 (3). pp. 473-477.
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Official URL: http://dx.doi.org/10.1021/nl0524290
Single polymer nanopores with permanent surface charges act as rectifiers of ionic current. The pores are tapered cones with narrow openings of several nanometers and wide openings of similar to 1 mu m. The pores are cation-selective, and in symmetric solutions of potassium chloride they rectify the flow of potassium ions from the small opening toward the wide opening. Millimolar concentrations of calcium reverse the rectification, and a negative incremental resistance is observed. These observations can be interpreted by a model containing flashing ratchets.
|Subjects:||Physical Science > Nanoelectronics|
|Deposited On:||23 Jan 2009 10:54|
|Last Modified:||25 Feb 2009 11:15|
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