Nanofluidic diode and bipolar transistor.
Theoretical modeling of ionic distribution and transport in a nanochannel containing a surface charge on its wall, 30 nm high and 5 microm long, suggests that ionic current can be controlled by locally modifying the surface charge density through a gate electrode, even if the electrical double layers are not overlapped. When the surface charge densities at the right and left halves of a channel are the same absolute value but of different signs, this could form the basis of a nanofluidic diode. When the surface charge density at the middle part of a channel is modified, this could form the basis of a nanofluidic bipolar transistor.
Daiguji
Hirofumi
H
Institute of Environmental Studies, Graduate School of Frontier Sciences, The University of Tokyo, Tokyo 113-0033, Japan. daiguji@k.u-tokyo.ac.jp
Oka
Yukiko
Y
Shirono
Katsuhiro
K