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

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., 51) crumpled graphene4msed nanosheets, is reported with the simple fabrication,:cletalled characterizations, and efficient gs-sensing applications. A facile supramblecular noncovalentasSembly 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-a/R-g = 3.8) toward 10 ppm of NO2, which is mainly attributed to the specific maxilloturbinatemimic 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.