Three-Dimensional Crumpled Graphene-Based Nanosheets with Ultrahigh NO₂ Gas Sensibility

Abstract

It is well-established that the structures dominate the properties. Inspired by the highly contorted and crumpled maxilloturbinate inside dog nose, herein an artificial nanostructure, i.e., 3D crumpled graphene-based nanosheets, is reported with the simple fabrication, detailed characterizations, and efficient gas-sensing applications. A facile supramolecular noncovalent assembly is introduced to modify graphene with functional molecules, followed with a lyophilization process to massively transform 2D plane graphene-based nanosheets to 3D crumpled structure. The detailed morphological characterizations reveal that the bioinspired nanosheets exhibit full consistency with maxilloturbinate. The fabricated 3D crumpled graphene-based sensors exhibit ultrahigh response (R/R = 3.8) toward 10 ppm of NO, which is mainly attributed to the specific maxilloturbinate-mimic structure. The sensors also exhibit excellent selectivity and sensing linearity, reliable repeatability, and stability. Interestingly, it is observed that only 4 mg of graphene oxide (GO) raw materials can produce more than 1000 gas sensors, which provides a new insight for developing novel 3D biomimetic materials in large-scale gas sensor production.

ZnO Nanocrystal-Based Chloroform Detection: Density Functional Theory (DFT) Study

“…The literature reveals that metal-oxide materials are the most widely used scaffold to fabricate gas sensors [15][16][17][18][19][20]. In particular, metal-oxide materials are widely utilized to fabricate sensors for toxic and explosive gases [20][21][22][23][24]. It has been observed that the nanocrystal interfaces can significantly influence the optical and electrical properties and charge-trapping phenomena [22][23][24][25].…”

“…In particular, metal-oxide materials are widely utilized to fabricate sensors for toxic and explosive gases [20][21][22][23][24]. It has been observed that the nanocrystal interfaces can significantly influence the optical and electrical properties and charge-trapping phenomena [22][23][24][25]. Zinc oxide (ZnO) is one of the most important and functional materials because of its various significant properties, including its wide bandgap; high exciton binding energy, piezoelectricity, and pyroelectricity; high conductivity and electron mobility; good stability in chemical and thermal environments; and biocompatibility [26][27][28].…”

Assembly with copper(ii) ions and D–π–A molecules on a graphene surface for ultra-fast acetic acid sensing at room temperature

“…2a), resulting in the loss of the interlaminar surface area and nally a largely reduced gas response. 30 While 4HQ-rGO uniformly deposited on the IDEs (Fig. 2b) due to its excellent dispersibility in water, 31 a higher specic surface area and better sensing performance were generated.…”

Improved NO2 Gas Sensing Properties of Graphene Oxide Reduced by Two-beam-laser Interference

“…In order to make the interior sheet fully contact to the test gas, it is necessary to prepared micro-nano hierarchical structure on the film to expand the specific surface area of material, and then, to improve the performance of the device. Researchers have developed nanostructured materials such as a 3-dimensional (3D) graphene foam network and a graphene nanomesh to overcome low-level sensitivity and slow response of graphene-based gas sensors 19 – 23 . Han et al .…”