TY - GEN
T1 - Pulsating gate bias in microfluidic liquid-gated field-effect transistor based on carbon nanotubes
T2 - 14th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2010, MicroTAS 2010
AU - Wijaya, I. Putu Mahendra
AU - Nie, Tey Ju
AU - Rodriguez, Isabel
AU - Mhaisalkar, Subodh G.
PY - 2010
Y1 - 2010
N2 - The advent of carbon nanotube liquid-gated transistor (LGFET) for biosensing applications allows the possibility of real-time and label-free detection of biomolecular interactions. The use of an aqueous solution as dielectric, however, has traditionally restricted the operating gate bias (VG) within |VG| < 1 volt, due to the electrolysis of water. Here, we describe pulsed-gating as a practical method to extend the operation window of LGFETs to |VG| < 1 volt. When operating in the |VG| < 1 volt region, large IDS drops can be observed which allows for the amplification of the signal obtained from the LGFET and as a result, detection limits down to atto-molar level concentration can be achieved. This is an order of magnitude improvement over conventionally employed DC-VG biasing.
AB - The advent of carbon nanotube liquid-gated transistor (LGFET) for biosensing applications allows the possibility of real-time and label-free detection of biomolecular interactions. The use of an aqueous solution as dielectric, however, has traditionally restricted the operating gate bias (VG) within |VG| < 1 volt, due to the electrolysis of water. Here, we describe pulsed-gating as a practical method to extend the operation window of LGFETs to |VG| < 1 volt. When operating in the |VG| < 1 volt region, large IDS drops can be observed which allows for the amplification of the signal obtained from the LGFET and as a result, detection limits down to atto-molar level concentration can be achieved. This is an order of magnitude improvement over conventionally employed DC-VG biasing.
KW - LGFET
KW - Liquid-gated field-effect transistor
KW - Pulsed gated bias
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M3 - Conference contribution
AN - SCOPUS:84884335196
SN - 9781618390622
T3 - 14th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2010, MicroTAS 2010
SP - 118
EP - 120
BT - 14th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2010, MicroTAS 2010
Y2 - 3 October 2010 through 7 October 2010
ER -