Journal
CHEM
Volume 4, Issue 4, Pages 896-910Publisher
CELL PRESS
DOI: 10.1016/j.chempr.2018.01.008
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Funding
- National Natural Science Foundation of China [21571046, 51732011, 21761132008, 21431006, 21503063]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [21521001]
- Chinese Academy of Sciences (CAS) Key Research Program of Frontier Sciences [QYZDJ-SSW-SLH036]
- National Basic Research Program of China [2014CB931800]
- Users with Excellence and Scientific Research Grant from the CAS Hefei Science Center [2015HSC-UE007]
- Program for New Century Excellent Talents in University [2013JYXR0654]
- Fundamental Research Funds for the Central Universities [JZ2016HGPA0735, JZ2017HGTB0197]
- Anhui Provincial Natural Science Foundation [1708085MB30]
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Macroscopic assembly can create advanced materials with hierarchical structure and translate the properties of individual building blocks into ensembles for specific applications. Here, we demonstrate the fabrication of freestanding graphene oxide (GO) films composed of only two Langmuir-Blodgett-induced monolayers under the synergy of wrinkled GO nanosheets and strong noncovalent interaction between GO and melamine. We found that the strongest noncovalent interaction ever measured (similar to 1 nN) was a synergistic effect of a charge-transfer interaction and hydrogen bonding. The as-obtained film delivered a large optical transmittance of 84.6% at 550 nm and a high mechanical strength of 45 MPa at a notable elongation of 3.5%. The reduced GO film, with a resistance of 420 Omega sq(-1), exhibited excellent electromechanical stability for 10,000 cycles at a bend radius of 1.5 mm. With the merits of a unique structure and outstanding properties, such an ultrathin film demonstrates its potential in the application of all-solid-state flexible supercapacitors.
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