Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University , Beijing 100191, P. R. China.
Department of Chemistry, Faculty of Science and Arts and Promising Centre for Sensors and Electronic Devices, Najran University , Najran 11001, Kingdom of Saudi Arabia.
ACS Appl Mater Interfaces. 2017 Apr 5;9(13):11819-11827. doi: 10.1021/acsami.7b01229. Epub 2017 Mar 24.
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.
众所周知，结构决定性质。受狗鼻子内高度扭曲和褶皱的鼻甲启发，本文报道了一种人工纳米结构，即 3D 褶皱石墨烯基纳米片，其具有简单的制备、详细的表征和高效的气体传感应用。引入了一种简单的超分子非共价组装来修饰具有功能分子的石墨烯，然后进行冷冻干燥过程，将大量的 2D 平面石墨烯基纳米片转化为 3D 褶皱结构。详细的形态特征揭示了仿生纳米片与鼻甲完全一致。所制备的 3D 褶皱石墨烯基传感器对 10 ppm 的 NO 表现出超高的响应（R/R = 3.8），这主要归因于特定的鼻甲模拟结构。该传感器还表现出优异的选择性、传感线性度、可靠的重复性和稳定性。有趣的是，我们观察到仅 4 mg 的氧化石墨烯（GO）原材料就可以生产出 1000 多个气体传感器，这为在大规模气体传感器生产中开发新型 3D 仿生材料提供了新的思路。
