title: Electric field control and analyte transport in Si/SiO2 fluidic nanochannels.
abstract: This article presents an analysis of the electric field distribution and current transport in fluidic nanochannels fabricated by etching of a silicon chip. The channels were overcoated by a SiO2 layer. The analysis accounts for the current leaks across the SiO2 layer into the channel walls. Suitable voltage biasing of the Si substrate allows eliminating of the leaks or using them to modify the potential distribution of the fluid. Shaping the potential in the fluid can be utilized for solute focusing and separations in fluidic nanochannels.
authors.affiliation: Center for Biomedical Engineering and Department of Chemical and Nuclear Engineering, University of New Mexico, Albuquerque, NM 87131, USA.
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhang
authors.forename: Thomas C
authors.initials: TC
authors.lastname: Gamble
authors.forename: Alexander
authors.initials: A
authors.lastname: Neumann
authors.forename: Gabriel P
authors.initials: GP
authors.lastname: Lopez
authors.forename: Steven R J
authors.initials: SR
authors.lastname: Brueck
authors.forename: Dimiter N
authors.initials: DN
authors.lastname: Petsev
mesh_terms: D004560:Electricity; D012825:Silicon / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: D012822:Silicon Dioxide; D012825:Silicon