Microfluidics Sensor to Detect Water Salinity and Bacteria Using Optical and Electrical Methods

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dc.contributor.advisorReza, Pouya
dc.contributor.advisorTabatabaie, Nima
dc.contributor.authorFarshchiheydari, MohammadJavad
dc.date.accessioned2022-12-14T16:20:48Z
dc.date.available2022-12-14T16:20:48Z
dc.date.copyright2022-05-19
dc.date.issued2022-12-14
dc.date.updated2022-12-14T16:20:48Z
dc.degree.disciplineMechanical Engineering
dc.degree.levelMaster's
dc.degree.nameMASc - Master of Applied Science
dc.description.abstractContaminants of various sources pollute waters worldwide and pose serious health issues to humans. Thereby, regular monitoring of the water quality is crucial. In this respect, this thesis aims to design an inexpensive microfluidic-based sensor with two microwire electrodes to narrow the gap between conventional lab-based methods and the necessary point-of-need qualities like miniaturization and lower cost. As two critical contaminators, the detection of NaCl and bacteria in water were picked to investigate the sensor’s performance. The sensor could measure water salinity in 1-120 ppm range using electrical conductivity with the limit of detection (LOD) of 0.39 ppm. The same sensor was then modified for bacteria detection in water samples with 106 and 107 CFU/mL. Afterwards, the feasibility of detecting bacteria from photothermal responses was studied to enhance the detection performance. The sensor demonstrated the bacteria detection in the 10-107 CFU/mL range with a state-of-the-art LOD of 10 CFU/ml.
dc.identifier.urihttp://hdl.handle.net/10315/40616
dc.languageen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectMechanical engineering
dc.subjectBiomedical engineering
dc.subjectEnvironmental engineering
dc.subject.keywordsMicrofluidics
dc.subject.keywordsDrinking water safety
dc.subject.keywordsEnvironmental monitoring
dc.subject.keywordsSalinity detection
dc.subject.keywordsWater salinity measurement
dc.subject.keywordsNumerical simulation
dc.subject.keywordsParametric study
dc.subject.keywordsCOMSOL Multiphysics
dc.subject.keywordsBacteria detection
dc.subject.keywordsLabel-free detection
dc.subject.keywordsResistive electrical biosensor
dc.subject.keywordsE. coli
dc.subject.keywordsBiosensor
dc.subject.keywordsPhoto-thermal detection
dc.subject.keywordsNanoparticles
dc.titleMicrofluidics Sensor to Detect Water Salinity and Bacteria Using Optical and Electrical Methods
dc.typeElectronic Thesis or Dissertation

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