Forced Assembly of Water‐Dispersible Carbon Nanotubes Trapped in Paper for Cheap Gas Sensors

Abstract

A versatile and readily scalable approach to fabricate a cheap and sensitive paper gas sensor is described. Chemically acidified single-walled carbon nanotubes are assembled in paper, forming continuous sensing arrays with a low detection limit and high detection selectivity for ammonia gas.

Carbon nanotubes on paper: Flexible and disposable chemiresistors

“…The response of all the fabricated paper-based sensors found in literature is compared in Figure 8. Interestingly, it is noted that the present sensor responses were greater than the response of SWCNT and reduced graphene oxide based sensor realized on paper [12,[21][22][23]. The prime reason for the enhanced sensitivity in the present study is due to purity of SWCNT, surfactant free dispersion, uniform and tight formation of SWCNT network over the paper using vacuum filtration process.…”

A Photo‐annealing Approach for Building Functional Polymer Layers on Paper

“…Narrowing the array width can dramatically improve the sensitivity of detection. [12] The conductivity change of a 1200 mm array is five times larger than that of a 4800 mm array. Furthermore, because the network of nanofibers provides a larger surface area, the polyanilinenanofiber-based paper device is superior to a paper device with a polyaniline film produced through vapor phase polymerization and exhibits better performance in recognizing ammonium gas.…”

Flexible Transparent Films Based on Nanocomposite Networks of Polyaniline and Carbon Nanotubes for High‐Performance Gas Sensing

“…Preparation of FMWCNTs : 15 mg of MWCNTs was added to a mixture of 9 mL HNO 3 and 27 mL H 2 SO 4 , and sonicated at 60 °C for 6 h . Then the dispersion of MWCNTs was filtered through a Millipore film and washed with deionized water until a neutral pH was obtained.…”

“…80%), has been unsatisfactory so far . CNT films have been employed to recognize gaseous analytes, but these demonstrated a relatively low sensing performance and no transparency . Therefore, the possibility of incorporating the needed transparency, flexibility, and high sensing performance into gas detectors that are based purely on a CNT network film remains limited.…”