Mimicking a Dog's Nose: Scrolling Graphene Nanosheets

被引:83
|
作者
Chen, Zhuo [1 ]
Wang, Jinrong [1 ]
Pan, Douxing [3 ]
Wang, Yao [1 ,2 ]
Noetzel, Richard [2 ]
Li, Hao [2 ]
Xie, Peng [1 ]
Pei, Wenle [1 ]
Umar, Ahmad [4 ,5 ]
Jiang, Lei [1 ]
Li, Nan [6 ]
de Rooij, Nicolaas Frans [6 ,7 ]
Zhou, Guofu [2 ,6 ,7 ]
机构
[1] Beihang Univ, Sch Chem, Key Lab Bioinspired Smart Interfacial Sci & Techn, Minist Educ, Beijing 100191, Peoples R China
[2] South China Normal Univ, Natl Ctr Int Res Green Optoelect, Guangzhou 510006, Guangdong, Peoples R China
[3] Chinese Acad Sci, Hefei Inst Phys Sci, Inst Adv Mfg Technol, Changzhou 213164, Peoples R China
[4] Najran Univ, Dept Chem, Fac Sci & Arts, Najran 11001, Saudi Arabia
[5] Najran Univ, Promising Ctr Sensors & Elect Devices, Najran 11001, Saudi Arabia
[6] Shenzhen Guohua Optoelect Tech Co Ltd, Shenzhen 518110, Peoples R China
[7] Acad Shenzhen Guohua Optoelect, Shenzhen 518110, Peoples R China
基金
中国国家自然科学基金;
关键词
graphene nanoscrolls; supramolecular assembly; lyophilization; cryo-SEM; gas sensors; QUALITY CARBON NANOSCROLLS; FUNCTIONALIZED GRAPHENE; EFFICIENT SYNTHESIS; OXIDE SHEETS; PERFORMANCE; NO2; SENSORS; FABRICATION; NANOCRYSTALS; COMPOSITES;
D O I
10.1021/acsnano.7b08294
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Inspired by the densely covered capillary structure inside a dog's nose, we report an artificial nanostructure, i.e., poly(sodium p-styrenesulfonate)-functionalized reduced graphene oxide nanoscrolls (PGNS), with high structural perfection and efficient gas sensing applications. A facile supramolecular assembly is introduced to functionalize graphene with the functional polymer, combined with the lyophilization technique to massively transform the planar graphene-based nanosheets to nanoscrolls. Detailed characterizations reveal that the bioinspired nanoscrolls exhibit a wide-open tubular morphology with uniform dimensions that is structurally distinct from the previously reported ones. The detailed morphologies of the graphene-based nanosheets in each scrolling stage during lyophilization are monitored by cryo-SEM. This unravels an asymmetric polymer-induced graphene scrolling mechanism including the corresponding scrolling process, which is directly presented by molecular dynamics simulations. The fabricated PGNS sensors exhibit superior gas sensing performance with reliable repeatability, excellent linear sensibility, and, especially, an ultrahigh response (R-a/R-g = 5.39, 10 ppm) toward NO2. The supramolecular assembly combined with the lyophilization technique to fabricate PGNS provides a strategy to design biomimetic materials for gas sensors and chemical trace detectors.
引用
收藏
页码:2521 / 2530
页数:10
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