Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 142, Issue 50, Pages 20962-20967Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.0c11061
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Funding
- BIST-IGNITE (MOFtors)
- Spanish MINECO [SEV-2014-0425, PRE2018-083712, RTI2018-095622-B-I00]
- Catalan AGAUR [2017 SGR 238]
- European Research Council (ERC) under the European Union [866348: iNanoSwarms]
- CERCA Program/Generalitat de Catalunya
- Severo Ochoa program from the Spanish MINECO [SEV-2017-0706]
- China Scholarship Council
- European Union's Horizon 2020 research and innovation program, under the Marie Sklodowska-Curie Individual Fellowship [H2020-MSCA-IF2018]
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Here, we report the design, synthesis, and functional testing of enzyme-powered porous micromotors built from a metal-organic framework (MOF). We began by subjecting a presynthesized microporous UiO-type MOF to ozonolysis, to confer it with mesopores sufficiently large to adsorb and host the enzyme catalase (size: 6-10 nm). We then encapsulated catalase inside the mesopores, observing that they are hosted in those mesopores located at the subsurface of the MOF crystals. In the presence of H2O2 fuel, MOF motors (or MOFtors) exhibit jet-like propulsion enabled by enzymatic generation of oxygen bubbles. Moreover, thanks to their hierarchical pore system, the MOFtors retain sufficient free space for adsorption of additional targeted species, which we validated by testing a MOFtor for removal of rhodamine B during self-propulsion.
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