Flexible Carbon Nanotube Membrane Sensory System: A Generic Platform

Abstract

Multi-walled carbon nanotube membrane as obtained from soft lithography-mediated selective chemical-vapor deposition template approach has been successfully integrated with flexible elastomeric polydimethylsiloxane framework to fabricate microsensing devices. Two proof-of-concept experiments, namely high-sensitivity chemical gas sensing and electrochemical detection have been performed to demonstrate its potential as a useful generic platform for general purposes sensory system.

Novel Three-Dimensional Electrodes: Electrochemical Properties of Carbon Nanotube Ensembles

“…Therefore, the density of CNTs needs to be reduced so that the intertube distance is in the same order of magnitude as the diffusion layer thickness. The high sensitivity neurotransmitter sensor demonstrated recently by Ng et al was attributed to the reduced density controlled by the soft-lithographic method. We have recently fabricated 2-D CNT nanoelectrode ensembles using vertically aligned MWCNTs followed by dielectric filling to insulate the side walls .…”

Fabrication of carbon-nanotube-based sensor array and interference study

“…7 Taking advantage of this, numerous reports have appeared on the investigation of the suitability of SWCNTs as sensing medium, showing reversible changes in conductivity upon adsorption of various gases and vapors. 5,[8][9][10][11][12][13][14][15][16][17][18][19] Capacitance of SWCNTs can also be measured and monitored to construct chemical sensors. 20 Though multiwalled CNTs can be used for chemical sensing as well, 21 there is no clear advantage in doing so.…”

Carbon Nanotube‐Based Chemical Sensors

“…Since the pioneering work reporting on the response of a CNTFET for ammonia and NO 2 exposures, there have been a large number of studies on the use of carbon nanotubes for sensing gases and vapors . The subject coverage includes a wide range of topics: types of nanotubes (SWCNTs, MWCNTs), doping/coating/metal loading/functionalization strategies, different gases and vapors, different transduction approaches (electrical, optical, etc.…”