Jump to main content
Jump to site search

Issue 24, 2017
Previous Article Next Article

Current–voltage characteristics influenced by the nanochannel diameter and surface charge density in a fluidic field-effect-transistor

Author affiliations

Abstract

The nanochannel diameter and surface charge density have a significant impact on current–voltage characteristics in a nanofluidic transistor. We have simulated the effect of the channel diameter and surface charge density on current–voltage characteristics of a fluidic nanochannel with positive surface charge on its walls and a gate electrode on its surface. Anion depletion/enrichment leads to a decrease/increase in ion current with gate potential. The ion current tends to increase linearly with gate potential for narrow channels at high surface charge densities and narrow channels are more effective to control the ion current at high surface charge densities. The current–voltage characteristics are highly nonlinear for wide channels at low surface charge densities and they show different regions of current change with gate potential. The ion current decreases with gate potential after attaining a peak value for wide channels at low values of surface charge densities. At low surface charge densities, the ion current can be controlled by a narrow range of gate potentials for wide channels. The current change with source drain voltage shows ohmic, limiting and overlimiting regions.

Graphical abstract: Current–voltage characteristics influenced by the nanochannel diameter and surface charge density in a fluidic field-effect-transistor

Back to tab navigation

Publication details

The article was received on 15 Apr 2017, accepted on 19 May 2017 and first published on 19 May 2017


Article type: Paper
DOI: 10.1039/C7CP02457F
Citation: Phys. Chem. Chem. Phys., 2017,19, 15701-15708
  •   Request permissions

    Current–voltage characteristics influenced by the nanochannel diameter and surface charge density in a fluidic field-effect-transistor

    K. P. Singh and C. Guo, Phys. Chem. Chem. Phys., 2017, 19, 15701
    DOI: 10.1039/C7CP02457F

Search articles by author

Spotlight

Advertisements