Nano Archive

Negative incremental resistance induced by calcium in asymmetric nanopores

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.

Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.

Official URL:


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.

Item Type:Article
Subjects:Physical Science > Nanoelectronics
ID Code:3801
Deposited By:SPI
Deposited On:23 Jan 2009 10:54
Last Modified:25 Feb 2009 11:15

Repository Staff Only: item control page