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Article: Enhanced ion tolerance of electrokinetic locomotion in polyelectrolyte-coated microswimmer

TitleEnhanced ion tolerance of electrokinetic locomotion in polyelectrolyte-coated microswimmer
Authors
KeywordsMicromotors
Propulsion
Magnetic microrobots
Issue Date2019
PublisherNature Research (part of Springer Nature): Fully open access journals. The Journal's web site is located at http://www.nature.com/ncomms/index.html
Citation
Nature Communications, 2019, v. 10, p. article no. 3921 How to Cite?
AbstractOver the last decade, researchers have endeavored to mimic the naturally motile microorganisms and develop artificial nano/microswimmers, which propel themselves in aqueous media. However, most of these nano/microswimmers are propelled by the self-electrophoretic mechanism, which has one critical incompetency: the inability to operate in a high concentration electrolyte solution, such as the most important body fluid, blood. This ionic quenching behavior is well backed by the classical Helmholtz–Smoluchowski theory and seems to be an insurmountable challenge which has shadowed the otherwise promising biomedical applications for artificial nano/microswimmers. Here, we propose that the active nano/microswimmer’s self-electrophoresis is fundamentally different from the passive nanoparticle electrophoresis. By significantly increasing the Dukhin number with polyelectrolyte coating and geometry optimization, a favorable deviation from the Helmholtz–Smoluchowski behavior can be realized, and ion tolerance is enhanced by over 100 times for a visible light-powered self-electrophoretic microswimmer.
Persistent Identifierhttp://hdl.handle.net/10722/274836
ISSN
2017 Impact Factor: 12.353
2015 SCImago Journal Rankings: 6.539
PubMed Central ID

 

DC FieldValueLanguage
dc.contributor.authorZHAN, X-
dc.contributor.authorWang, J-
dc.contributor.authorXiong, Z-
dc.contributor.authorZhang, X-
dc.contributor.authorZHOU, Y-
dc.contributor.authorZheng, J-
dc.contributor.authorCHEN, J-
dc.contributor.authorFeng, SP-
dc.contributor.authorTang, J-
dc.date.accessioned2019-09-10T02:29:50Z-
dc.date.available2019-09-10T02:29:50Z-
dc.date.issued2019-
dc.identifier.citationNature Communications, 2019, v. 10, p. article no. 3921-
dc.identifier.issn2041-1723-
dc.identifier.urihttp://hdl.handle.net/10722/274836-
dc.description.abstractOver the last decade, researchers have endeavored to mimic the naturally motile microorganisms and develop artificial nano/microswimmers, which propel themselves in aqueous media. However, most of these nano/microswimmers are propelled by the self-electrophoretic mechanism, which has one critical incompetency: the inability to operate in a high concentration electrolyte solution, such as the most important body fluid, blood. This ionic quenching behavior is well backed by the classical Helmholtz–Smoluchowski theory and seems to be an insurmountable challenge which has shadowed the otherwise promising biomedical applications for artificial nano/microswimmers. Here, we propose that the active nano/microswimmer’s self-electrophoresis is fundamentally different from the passive nanoparticle electrophoresis. By significantly increasing the Dukhin number with polyelectrolyte coating and geometry optimization, a favorable deviation from the Helmholtz–Smoluchowski behavior can be realized, and ion tolerance is enhanced by over 100 times for a visible light-powered self-electrophoretic microswimmer.-
dc.languageeng-
dc.publisherNature Research (part of Springer Nature): Fully open access journals. The Journal's web site is located at http://www.nature.com/ncomms/index.html-
dc.relation.ispartofNature Communications-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectMicromotors-
dc.subjectPropulsion-
dc.subjectMagnetic microrobots-
dc.titleEnhanced ion tolerance of electrokinetic locomotion in polyelectrolyte-coated microswimmer-
dc.typeArticle-
dc.identifier.emailWang, J: jizhuang@hku.hk-
dc.identifier.emailZheng, J: zjing@hku.hk-
dc.identifier.emailFeng, SP: hpfeng@hku.hk-
dc.identifier.emailTang, J: jinyao@hku.hk-
dc.identifier.authorityFeng, SP=rp01533-
dc.identifier.authorityTang, J=rp01677-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1038/s41467-019-11907-1-
dc.identifier.pmid31477723-
dc.identifier.pmcidPMC6718642-
dc.identifier.scopuseid_2-s2.0-85071869280-
dc.identifier.hkuros305066-
dc.identifier.volume10-
dc.identifier.spagearticle no. 3921-
dc.identifier.epagearticle no. 3921-
dc.publisher.placeUnited Kingdom-

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