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Nano Lett. 2012 Jan 11;12(1):396-401. doi: 10.1021/nl203717q. Epub 2011 Dec 7.

Bacterial isolation by lectin-modified microengines.

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1
Department of Nanoengineering, University of California-San Diego, La Jolla, California 92093, USA.

Abstract

New template-based self-propelled gold/nickel/polyaniline/platinum (Au/Ni/PANI/Pt) microtubular engines, functionalized with the Concanavalin A (ConA) lectin bioreceptor, are shown to be extremely useful for the rapid, real-time isolation of Escherichia coli (E. coli) bacteria from fuel-enhanced environmental, food, and clinical samples. These multifunctional microtube engines combine the selective capture of E. coli with the uptake of polymeric drug-carrier particles to provide an attractive motion-based theranostics strategy. Triggered release of the captured bacteria is demonstrated by movement through a low-pH glycine-based dissociation solution. The smaller size of the new polymer-metal microengines offers convenient, direct, and label-free optical visualization of the captured bacteria and discrimination against nontarget cells.

PMID:
22136558
PMCID:
PMC3256279
DOI:
10.1021/nl203717q
[Indexed for MEDLINE]
Free PMC Article
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