Ab initio study of the effect of water adsorption on the carbon nanotube field-effect transistor

Abstract

Articles you may be interested inAb-initio calculations for a realistic sensor: A study of CO sensors based on nitrogen-rich carbon nanotubes AIP Advances 2, 032115 (2012); 10.1063/1.4739280Conductance of individual channels in a carbon nanotube field-effect transistor studied by magnetic force microscopy

Does water dope carbon nanotubes?

“…21,[25][26][27][28] This weak interaction has been shown to cause little scattering, and the conductance of individual CNTs when hydrated is little changed from when dry. 26,29 Charge transfer analyses, also performed within DFT, have suggested that water may n-dope CNTs.…”

Carbon nanotube-based nano-fluidic devices

“…[117][118][119][120] Internal wetting produces exactly the opposite result: the threshold moves to more positive gate bias and the hysteresis decreases.…”

“…V ds = 0.8V for both (a) and (b). (c) I ds time traces during adding water into the reservoirs for both unopened and opened tubes at V ds = 0.8 V and V gs = 10 V. 124 Studies of external wetting [117][118][119][120] have been carried out using a window opened in dielectric material that covers the metallic contacts (Figure 6.5).…”

“…115,116 Wetting of the outside of SWCNT-FETs by water changes their hysteresis and shifts their threshold gate voltage (V th ). [117][118][119][120] The resistivity of SWCNT mats falls when they are wetted (possibly both inside and outside) 104,121 but these results are difficult to interpret in terms of the response of individual SWCNTs. Thus, we have used our new devices, in which just one SWCNT connects two fluid reservoirs to compare the effects of external and internal wetting on SWCNT-FETs.…”

Single-Walled Carbon Nanotube Network Gas Sensor

“…(Li et al, 2003;Karthigeyan, et al, 2008;Maeng, et al, 2008-a) The use of microheaters is highly recommendable as the characteristics of SWCNT devices are affected by humidity. (Sung et al, 2006) Carbon nanotubes are also known to exhibit higher sensitivity at moderately elevated temperature range. (Valentini, et al,2003) It is, thus, desirable for SWCNTs network to become monolayer so that the temperature of microheater and the nanotubes coincides during the operation.…”