Portable electronic nose system based on the carbon black–polymer composite sensor array

Two-step preconcentration for analysis of exhaled gas of human breath with electronic nose

“…The sensor materials used were carbon black-polymer composites [17][18][19][20][21]. The matrix polymers used were ethyl cellulose (EC), poly(ethylene-co-vinyl acetate) 40% (PEVA40), polyvinyl-pyrrolidone (PVP) and polycaprolactone (PCL).…”

An assessment of sensing technologies for the detection of clandestine methamphetamine drug laboratories

“…Common examples include chemical resistors (typically referred to as chemiresistors) [22][23][24][25][26][27][28][29], chemically sensitive field-effect transistors (chemFETs) [30,31], electrochemical sensors [32][33][34][35][36][37][38][39][40][41][42], semiconducting metal oxide (SMO) sensors [43][44][45][46][47][48][49], and thermal sensors [50][51][52][53][54]. The detection mechanism varies across this class of sensors from a swelling-induced change in the conductance of polymer-based chemiresistors, to the calorimetricinduced change in conductance of thermal sensors.…”

“…However, colourimetric sensor response is often binary (the analyte is or is not present) and accurate quantitative information on the concentration of the analyte is difficult to obtain [106]. Nevertheless, colourimetric sensors are selective, possess low detection limits (ppb's to low ppm's) and fast Low ppm's [26] 400 a [28], low ppm's [26] <20 a [24] ChemFETs response times and could be applied to both stationary and moving detection platforms. High sensitivity and ease of operation are two major advantages of fluorescent chemical sensors [114].…”

A bio-inspired two-layer multiple-walled carbon nanotube–polymer composite sensor array and a bio-inspired fast-adaptive readout circuit for a portable electronic nose

“…Research, including that from our own group, working under size and price restraints, has produced a portable E-Nose based on a carbon black-polymer composite sensor array (Kim et al, 2005;Matzger et al, 2000). Compared those of with carbon black, the electrical conduction properties of carbon nanotubes (CNTs) have drawn considerable interest (Grant and White, 1991;Park et al, 2009), and multiple-walled carbon nanotube * Corresponding author.…”