Fabrication of low-noise carbon nanotube field-effect transistor biosensors

We report the fabrication of suspended carbon nanotube field effect transistors (CNT FETs) designed for biological sensing applications. We compare the electrical properties of our suspended CNT FET design to standard surface based CNT FETs. In particular, we show a reduction in environmental noise, suggesting that the new sensor design is a promising candidate for low-noise sensing applications.

[1]  C. Hierold,et al.  Hysteresis-free operation of suspended carbon nanotube transistors. , 2010, Nature nanotechnology.

[2]  G. Schneider,et al.  Modeling the electrostatic signature of single enzyme activity. , 2010, Journal of Physical Chemistry B.

[3]  P. McEuen,et al.  Bending and twisting of suspended single-walled carbon nanotubes in solution. , 2009, Nano letters.

[4]  E. Williams,et al.  Facile fabrication of suspended as-grown carbon nanotube devices , 2008, 0909.3679.

[5]  Zhongfan Liu,et al.  Creation of nanostructures with poly(methyl methacrylate)-mediated nanotransfer printing. , 2008, Journal of the American Chemical Society.

[6]  Cees Dekker,et al.  Charge noise in liquid-gated single-wall carbon nanotube transistors. , 2008, Nano letters.

[7]  Jinhee Kim,et al.  Origin of gate hysteresis in carbon nanotube field-effect transistors , 2007 .

[8]  P. Avouris,et al.  Impact of oxide substrate on electrical and optical properties of carbon nanotube devices , 2007 .

[9]  A. Star,et al.  Carbon Nanotube Field‐Effect‐Transistor‐Based Biosensors , 2007 .

[10]  H. Dai,et al.  Electron transport in very clean, as-grown suspended carbon nanotubes , 2005, Nature materials.

[11]  J. Kong,et al.  Integration of a gate electrode into carbon nanotube devices for scanning tunneling microscopy , 2005, cond-mat/0502501.

[12]  Ophir Vermesh,et al.  Hysteresis caused by water molecules in carbon nanotube field-effect transistors , 2003 .

[13]  J. Tersoff,et al.  Low-frequency noise in nanoscale ballistic transistors. , 2007, Nano letters.