1 research outputs found
Sloped-Gate Voltage Method for Improving Measurement of Poly-Si Nanowire FET in Aqueous Environment
Nanowire
field-effect transistors are suited to study the activity
of biomolecules in bionanotechnology. The changes of biomolecules
process are efficiently affected the charge at the nanowire surface;
thus, the electrical characterization of NW-FET is changed. Although
NW-FET is a well-known device in bioapplications, however, the intrinsic
electrical characterization of NW-FET effect on real electrical measurement
is not well studied. We present herein a novel measurement method
to avoid errors in electrical characteristic of nanowire field-effect
transistors. A physical model is developed to explore the effect of
the leakage current, which is influenced by the charging effect of
an equivalent capacitor in a NW-FET. We also present a sloped-gate
voltage method to reduce the effect of equivalent capacitor in air,
liquid, and phosphate buffered solution. The application of the sloped-gate
voltage method significantly increases the stability of electrical
characterization measurements. This method can also be easily applied
to biosensing experiments