期刊
CHEMICAL SCIENCE
卷 12, 期 29, 页码 9969-9976出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1sc02561a
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资金
- German Federal Ministry of Education and Research (BMBF)
- Max Planck Society
- European Research Council (ERC) [852187]
- Deutsche Forschungs-gemeinschaft via the International Research Training Group ATUMS (IRTG 2022)
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy) [EXC 2089/1 - 390776260]
The demand for transient materials is increasing, chemically fueled materials and self-immolative materials each have their own advantages and disadvantages, a new type of material that combines the advantages of both has been developed.
There is an increasing demand for transient materials with a predefined lifetime like self-erasing temporary electronic circuits or transient biomedical implants. Chemically fueled materials are an example of such materials; they emerge in response to chemical fuel, and autonomously decay as they deplete it. However, these materials suffer from a slow, typically first order decay profile. That means that over the course of the material's lifetime, its properties continuously change until it is fully decayed. Materials that have a sharp on-off response are self-immolative ones. These degrade rapidly after an external trigger through a self-amplifying decay mechanism. However, self-immolative materials are not autonomous; they require a trigger. We introduce here materials with the best of both, i.e., materials based on chemically fueled emulsions that are also self-immolative. The material has a lifetime that can be predefined, after which it autonomously and rapidly degrades. We showcase the new material class with self-expiring labels and drug-delivery platforms with a controllable burst-release.
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