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Exfoliation and Analysis of Large-area, Air-Sensitive Two-Dimensional Materials
Published on: January 5, 2019
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Ultratough graphene-black phosphorus films
Tianzhu Zhou1,2,3, Hong Ni1, Yanlei Wang4
1Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, People's Republic of China.
Summary
Black phosphorus functionalized graphene films achieve record toughness by combining crack arrest and plastic deformation. These tough graphene films offer high performance for flexible energy storage and electromagnetic shielding.
Area of Science:
- Materials Science
- Nanotechnology
- Polymer Science
Background:
- Graphene-based films are crucial for flexible electronics but achieving high toughness remains difficult.
- Conventional methods to enhance toughness include crack arrest and plastic deformation.
Purpose of the Study:
- To develop ultra-tough graphene films by functionalizing with black phosphorus.
- To investigate the mechanisms behind the enhanced toughness.
Main Methods:
- Fabrication of black phosphorus functionalized graphene oxide films.
- Chemical reduction and use of conjugated molecules for π-π stacking.
- In situ Raman spectroscopy and molecular dynamics simulations.
Main Results:
- Achieved a record toughness of ~51.8 MJ m⁻³ in graphene films.
- Demonstrated synergistic toughening effects from P-O-C bonding, BP lubrication, and π-π stacking.
- Films exhibited high tensile strength, conductivity, stability, and electromagnetic shielding.
Conclusions:
- Black phosphorus functionalization significantly enhances graphene film toughness.
- The developed films are suitable for advanced applications like flexible supercapacitors and electromagnetic interference shielding.
