Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 268, Issue -, Pages 188-194Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.04.043
Keywords
Salmonella typhimurium; Magnetic nanomaterials; Photothermal effect; Photothermal killing; Thermal sensor
Funding
- National Key R&D Program of China [2016YFD0401100]
- Natural Science Foundation of Shandong Province [ZR2016CM47, ZR2017BC019]
- Science and Technology Development Plan of Shandong Province [2014GSF121039]
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A strategy based on immune-magnetic nanomaterials was developed for the sensitive, rapid and simple detection of Salmonella typhimurium. High-efficiency capture, high-sensitivity thermal sensor detection and sterilization of Salmonella typhimurium can be simultaneously achieved using the combined magnetic and thermal properties of a magnetic nanomaterial. The temperature change caused by irradiating magnetic nanomaterials with a laser was used to establish a standard curve for the dependence of the temperature change on the number of Salmonella typhimurium bacteria. Under optimal conditions, the limit of detection was as low as 300 CFU mL(-1). Salmonella typhimurium spiked in drinking water can be successfully detected in 1.5 h with a recovery between 96.2 +/- 7.4% and 106.4 +/- 5.6%. (C) 2018 Elsevier B.V. All rights reserved.
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