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Covalent layer-by-layer films: chemistry, design, and multidisciplinary applications
1Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China. an@cugb.edu.cn.
Chemical Society Reviews
|May 17, 2018
Summary
Covalent layer-by-layer (LbL) assembly offers enhanced ultrathin films with improved durability and design flexibility. This method utilizes covalent crosslinking for stable incorporation of diverse components, enabling advanced material applications.
Area of Science:
- Materials Science
- Nanotechnology
- Polymer Chemistry
Background:
- Layer-by-layer (LbL) assembly is a versatile technique for fabricating ultrathin films.
- Conventional LbL films rely on noncovalent interactions, limiting their stability and component diversity.
- Covalent crosslinking presents an alternative approach to LbL film construction.
Purpose of the Study:
- To review chemical methods for constructing covalent layer-by-layer (LbL) films.
- To highlight the unique properties and applications of covalent LbL films.
- To bridge chemical advancements in film fabrication with materials engineering.
Main Methods:
- Focuses on chemical strategies for building covalent LbL films.
- Discusses the incorporation of diverse chemical species via covalent bonding.
- Explores selective covalent crosslinking in componential, spatial, and temporal dimensions.
Main Results:
- Covalent LbL films exhibit enhanced endurance and rigidity compared to noncovalent counterparts.
- Enables stable incorporation of uncharged species and small molecules.
- Offers increased structural diversity through selective covalent crosslinking.
Conclusions:
- Covalent LbL assembly provides nanoscopic precision, componential diversity, and flexible design for ultrathin films.
- These films possess superior mechanical properties and broader applicability.
- Facilitates the development of functional materials for energy, biomedical, and environmental applications.
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