Janus Emulsions for the Detection of Bacteria
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Version 1 2017-03-23, 12:33
Posted on 2017-04-26 - 05:19
Janus emulsion assays
that rely on carbohydrate–lectin binding
for the detection of Escherichia coli bacteria are
described. Surfactants containing mannose are self-assembled at the
surface of Janus droplets to produce particles with lectin binding
sites. Janus droplets orient in a vertical direction as a result of
the difference in densities between the hydrocarbon and fluorocarbon
solvents. Binding of lectin to mannose(s) causes agglutination and
a tilted geometry. The distinct optical difference between naturally
aligned and agglutinated Janus droplets produces signals that can
be detected quantitatively. The Janus emulsion assay sensitively and
selectively binds to E. coli at 104 cfu/mL
and can be easily prepared with long-time stability. It provides the
basis for the development of inexpensive portable devices for fast,
on-site pathogen detection.
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Zhang, Qifan; Savagatrup, Suchol; Kaplonek, Paulina; Seeberger, Peter H.; Swager, Timothy M. (2017). Janus Emulsions for the Detection of Bacteria. ACS Publications. Collection. https://doi.org/10.1021/acscentsci.7b00021
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AUTHORS (5)
QZ
Qifan Zhang
SS
Suchol Savagatrup
PK
Paulina Kaplonek
PS
Peter H. Seeberger
TS
Timothy M. Swager