TY - GEN
T1 - Liquid gated carbon nanotubes field effect transistors (LGCNTFET) platform for herbicide sensing
AU - Tey, J. N.
AU - Wijaya, I. P.M.
AU - Suri, C. R.
AU - Gandhi, S.
AU - Wei, J.
AU - Rodriguez, I.
AU - Mhaisalkar, S. G.
PY - 2010
Y1 - 2010
N2 - Single-walled carbon nanotube (SWCNT) is a onedimensional system with all its carbon atoms present on the surface, hence its conductance is highly sensitive to the surrounding charge environment. Due to the extreme charge sensitivity, biocompatibility and chemical stability, SWCNT is particularly interested in biosensing application. In this paper, we demonstrated a practical approach of fabricating laminated SWCNT liquid gate field effect transistor (LGFET) through a solution processed route involving only two materials, PDMS and SWCNT. The laminated SWCNT LGFETs show great potential towards atrazine detection. The change in the detection signal in terms of conductance was deduced to be due to electrostatic gating mechanism caused by the localized interaction between CNT and the biomolecules. Although relatively high concentration was used in the experiment, the detection limit could be lowered down further by improving the signal-to-noise ratio of the measurement, which can be done through either signal amplification, and/or noise reduction.
AB - Single-walled carbon nanotube (SWCNT) is a onedimensional system with all its carbon atoms present on the surface, hence its conductance is highly sensitive to the surrounding charge environment. Due to the extreme charge sensitivity, biocompatibility and chemical stability, SWCNT is particularly interested in biosensing application. In this paper, we demonstrated a practical approach of fabricating laminated SWCNT liquid gate field effect transistor (LGFET) through a solution processed route involving only two materials, PDMS and SWCNT. The laminated SWCNT LGFETs show great potential towards atrazine detection. The change in the detection signal in terms of conductance was deduced to be due to electrostatic gating mechanism caused by the localized interaction between CNT and the biomolecules. Although relatively high concentration was used in the experiment, the detection limit could be lowered down further by improving the signal-to-noise ratio of the measurement, which can be done through either signal amplification, and/or noise reduction.
UR - http://www.scopus.com/inward/record.url?scp=77954245244&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77954245244&partnerID=8YFLogxK
U2 - 10.1115/IMECE2009-10571
DO - 10.1115/IMECE2009-10571
M3 - Conference contribution
AN - SCOPUS:77954245244
SN - 9780791843758
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings
SP - 249
EP - 254
BT - Proceedings of the ASME International Mechanical Engineering Congress and Exposition 2009, IMECE 2009
PB - American Society of Mechanical Engineers (ASME)
T2 - 2009 ASME International Mechanical Engineering Congress and Exposition, IMECE2009
Y2 - 13 November 2009 through 19 November 2009
ER -