Crumpled graphene oxide for enhanced room temperature gas sensing: understanding the critical roles of surface morphology and functionalization

Abstract

This work fundamentally explores graphene oxide morphology and functionality with regard to room temperature gas sensing performance. Highly-oxidized, crumpled graphene oxide (HO-CGO) was synthesized using a scalable, aerosol-based process. To...

Structural Effects of Crumpled Graphene and Recent Developments in Comprehensive Sensor Applications: A Review

“…Another method to obtain CGO is aerosol processing. [53][54][55] This method is simple and ecofriendly when it starts with an aqueous solution, has a quick processing time, and applies to continuous production. [56] Several ways to avoid aggregation in solution have been explored, including sheet size reduction, solvent-graphene interaction modification, and dispersion agents.…”

“…[140] In addition, it is anticipated that the along with-deposited CGO thin films with the highest amount of functional groups that contain oxygen would have superior performance. [53]…”

Polyurethane Foam with High-Efficiency Flame Retardant, Heat Insulation, and Sound Absorption Modified By Phosphorus-Containing Graphene Oxide

“…The grafting of phosphorus-containing groups onto GO potentially disrupted its original structure, causing local distortion or damage, thereby increasing defects. Additionally, the introduction of phosphorus-containing functional groups could have resulted in nonuniform stress distribution across the layers, leading to bending or folding as a means to mitigate the overall stress. , Figure e shows the STEM images of GO and the distribution of C, O, and P elements in EDS mapping, and Figure f shows the STEM images of D-GO and the distribution of C, O, and P elements in EDS mapping. Comparative analysis indicated an almost negligible presence of P element in GO, whereas a notable increase in P was observed in D-GO.…”

Solution-processed In2Se3 nanosheets for ultrasensitive and highly selective NO2 gas sensors

“…[6][7][8][9][10] These sensors are popular, due to their small size and easy operation mechanism, whereby changes in electrical parameters of metal oxides are used as a sensing signal, based on the adsorption of gas molecules on their surface. [6][7][8][11][12][13][14][15][16][17][18] However, to ensure high sensitivity, the sticking coefficient for the adsorption of gases on their surface should be maximized, while keeping the absolute value of the adsorption energy not too high to ensure adsorption/desorption of analytes. Moreover, the presence of different gaseous and volatile organic compounds in the air can cause variations in the conductance (or resistance) of metal oxides, affecting their selectivity to a specic analyte.…”