Graphene nanoribbons as flexible docks for chemiresistive sensing of gas phase explosives

Abstract

Oblique view of a sensing nanoribbon in equilibrium with an analyte molecule.

Progressive Trends in Hybrid Material-Based Chemiresistive Sensors for Nitroaromatic Compounds

“…The EDA-capped PbS QD sensor can efficiently detect nitro-benzene vapor at ambient temperature, with a response of 0.34% measured at an NB concentration of 65 ppb with 2 ppb detection [ 31 ]. Graphene-based devices for chemiresistive sensing are particularly intriguing because they have the potential to integrate flexibility with excellent mechanical properties, thermal stability, electrical conductivity, and specific surface area [ 56 ]. As the forerunners of the RGO gas sensor, reduced graphene oxide (RGO) sensors could detect warfare chemicals and explosives at parts-per-billion (ppb) levels [ 57 ].…”

Spin Current Sensing for Selective Detection of Explosive Molecules

“…Examples include multiparameter fiber-optic sensors, dual-mode electrochemical, piezoelectric, and meta-material based sensors for structural, mechanical, and biomedical applications, dual-input dual-output spectroscopic sensors for gas sensing, and multi-input multi-output sensor systems for material imaging or gas sensing . Published work on nanoscale sensors , also reflects a strong interest in multifunctional sensing; examples include nanoresonators which measure both the mass and the position of an adsorbed molecule, doped or functionalized nanoparticles for ion or vitamin detection in living cells, and flexible graphene docks for chemiresistive sensing of gas phase explosives …”

“…7 Published work on nanoscale sensors 8,9 also reflects a strong interest 10 in multifunctional sensing; examples include nanoresonators which measure both the mass and the position of an adsorbed molecule, 11 doped 12 or functionalized 13 nanoparticles for ion or vitamin detection in living cells, and flexible graphene docks for chemiresistive sensing of gas phase explosives. 14 Although the literature discusses a wide range of optical, chemical, electronic, mechanical, and magnetic sensing mechanisms, including gas sensors employing spin polarization effects in carbon nanotubes, 15,16 it appears that no previous work has proposed the development of spin current based sensing devices, despite advances in spin current measurement research 17 and considerable computational study of spintronics technology. Spintronic devices, such as spin filters and spin logic gates, 18 have been modeled and in some cases prototyped, 19,20 in research aimed at fundamental extensions of electronics technology.…”

Explosive molecule sensing at lattice defect sites in metallic carbon nanotubes

“…Hence recent research on hazardous gas sensing has placed considerable emphasis on the development of nanosensors, 6,7 including one and two dimensional nanocarbons. [8][9][10] Published experimental studies have tested carbon nanotube (CNT) based devices in gas sensing applications, [11][12][13][14][15][16] and reported considerable success in detecting a wide range of molecules, from hydrogen 15 to complex nerve agents. 16 All of the papers just cited employed 'as produced' carbon nanotubes (CNTs).…”