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- W1721301010 abstract "Real-time identification of multiple bacterial pathogens in food is urgently needed to ensure food safety. Although rapid and sensitive detection methods offering simplicity, accuracy, and multiplexity are highly desirable for industrial food applications, the development of a biosensor that meets all criteria remains a challenge. In this study, a single walled carbon nanotube- (SWCNT) based multi-junction sensor was designed for potential multiplexed detection of foodborne pathogens. Gold tungsten wires (Ø: 50 μm) coated with polyethylenimine (PEI) and SWCNTs were aligned to form a 2 × 2 junction array, functionalized with streptavidin and biotinylated antibodies specific for Escherichia coli K-12 and Staphylococcus aureus. Electric current (I) measurements in response to target binding events in pure serial diluted samples of E. coli and S. aureus at each junction within the 2 × 2 array were monitored to create calibration curves. An inverse correlation between I signals and bacterial concentrations was observed. Changes in I (∆I) were also calculated to reduce background noise and emphasize the SWCNT-based sensor's response to the biorecognition reactions between antibody and antigens. A linear regression was observed for both the E. coli and S. aureus functionalized array sensors, R(2)=0.978 and R(2)=0.992, in range of 10(2)-10(5)CFU/mL. The calibration curves were used to evaluate the sensor's multiplexing capabilities to detect E. coli and S. aureus in 10 µL and 100 µL batch microbial cocktail samples.Isignal responses exhibited similar measurement trends indicating that the developed SWCNT-based multi-junction biosensor has potential for sensitive, simple, and multiplexed applications." @default.
- W1721301010 created "2016-06-24" @default.
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- W1721301010 date "2016-03-01" @default.
- W1721301010 modified "2023-10-16" @default.
- W1721301010 title "Rapid detection of multiple foodborne pathogens using a nanoparticle-functionalized multi-junction biosensor" @default.
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- W1721301010 doi "https://doi.org/10.1016/j.bios.2015.09.030" @default.
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