Electrostatic control of ions and molecules in nanofluidic transistors.
We report a nanofluidic transistor based on a metal-oxide-solution (MOSol) system that is similar to a metal-oxide-semiconductor field-effect transistor (MOSFET). Using a combination of fluorescence and electrical measurements, we demonstrate that gate voltage modulates the concentration of ions and molecules in the channel and controls the ionic conductance. Our results illustrate the efficacy of field-effect control in nanofluidics, which could have broad implications on integrated nanofluidic circuits for manipulation of ions and biomolecules in sub-femtoliter volumes.
Karnik
Rohit
R
Department of Mechanical Engineering, University of California, Berkeley, California 94720, USA.
Fan
Rong
R
Yue
Min
M
Li
Deyu
D
Yang
Peidong
P
Majumdar
Arun
A
D004563:Electrochemistry / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007477:Ions; D044085:Microfluidics / Q000295:instrumentation* / Q000379:methods; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure*; D055672:Static Electricity; D014173:Transistors, Electronic
D007477:Ions