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Title: Mechanisms of transport enhancement for self-propelled nanoswimmers in a porous matrix

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America

Significance As with living microorganisms, many real-world applications of synthetic micro/nanoswimmers are likely to rely on transport in complex environments, a phenomenon that remains poorly understood. Here, we report anomalously rapid transport of self-propelled particles in a porous medium, where nanoswimmers escaped from cavities more than an order of magnitude faster than expected compared to corresponding Brownian particles. This phenomenon was determined to be due to nuanced effects associated with self-propulsion, including enhanced mobility in confinement, efficient surface-mediated searching for holes, and the abolition of barriers at cavity exits. These mechanisms are broadly generalizable, and the previously unknown transport efficiency of nanoswimmers in complex porous environments suggests tremendous opportunities in forward-looking applications, including drug delivery and environmental remediation.

Research Organization:
Univ. of Colorado, Boulder, CO (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001854
OSTI ID:
1798952
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 27 Vol. 118; ISSN 0027-8424
Publisher:
Proceedings of the National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English

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