期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 110, 期 2, 页码 431-436出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1213432110
关键词
self-oscillating gels; autochemotactic gels; autochemotactic self-organization
资金
- National Science Foundation
- Army Research Office
- Air Force Office of Scientific Research
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [0926362] Funding Source: National Science Foundation
Using computational modeling, we show that self-oscillating Belousov-Zhabotinsky (BZ) gels can both emit and sense a chemical signal and thus drive neighboring gel pieces to spontaneously self-aggregate, so that the system exhibits autochemotaxis. To the best of our knowledge, this is the closest system to the ultimate self-recombining material, which can be divided into separated parts and the parts move autonomously to assemble into a structure resembling the original, uncut sample. We also show that the gels' coordinated motion can be controlled by light, allowing us to achieve selective self-aggregation and control over the shape of the gel aggregates. By exposing the BZ gels to specific patterns of light and dark, we design a BZ gel train that leads the movement of its cargo. Our findings pave the way for creating reconfigurable materials from self-propelled elements, which autonomously communicate with neighboring units and thereby actively participate in constructing the final structure.
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