NDLI: Wireless magnetoelastic biosensors for the detection of Salmonella on fresh produce

Content Provider	IEEE Xplore Digital Library
Author	Yating Chai Horikawa, S. Simonian, A. Dyer, D. Chin, B.A.
Copyright Year	2013
Description	Author affiliation: Mater. Res. & Educ. Center, Auburn Univ., Auburn, AL, USA (Yating Chai; Horikawa, S.; Simonian, A.; Dyer, D.; Chin, B.A.)
Abstract	This paper investigates the use of wireless magnetoelastic (ME) biosensors for the direct detection of Salmonella Typhimurium on fresh produce (tomatoes, spinach leaves and shell eggs). The ME biosensor consists of an ME resonator as the sensor platform and E2 phage as the bio-recognition element. The E2 phage is genetically engineered to specifically bind with S. Typhimurium. The ME biosensor, a wireless sensor, is actuated into resonance by an externally applied magnetic field. When the biosensor binds with Salmonella cells, the mass of the resonator increases, resulting in a decrease in the sensor's resonant frequency. Multiple sensors can be wirelessly and remotely monitored. Multiple measurement and control sensors were placed on fresh produce that was spiked with S. Typhimurium solutions of different known concentrations (5 × $10^{1}$ to 5 × $10^{8}$ CFU/ml (colony-forming unit/ml)). The resonant frequency of the sensors before and after the exposure to the spiked fresh produce was measured. The resonant frequency change of the measurement sensors was significantly different from the control sensors, indicating Salmonella contamination. Despite the different surface topographies of the fresh produce, similar ME biosensor measurement results were obtained for the three fresh produces. Scanning electron microscopy was used to confirm binding of the Salmonella to the biosensor surface and the resulting resonant frequency changes.
Starting Page	174
Ending Page	177
File Size	4726690
Page Count	4
File Format	PDF
ISSN	21568073
e-ISBN	9781467352222
DOI	10.1109/ICSensT.2013.6727637
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-12-03
Publisher Place	New Zealand
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Decision support systems Magnetic field measurement biosensor bacteria detection Resonant frequency Metals resonator wireless Biosensors Surface treatment magnetoelastic
Content Type	Text
Resource Type	Article

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