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Microplastic Detection Using Impedance Measurements in a Microfluidic Channel.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Microplastic Detection Using Impedance Measurements in a Microfluidic Channel./
Author:	Mott, Vienna Laura.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
Description:	73 p.
Notes:	Source: Masters Abstracts International, Volume: 81-10.
Contained By:	Masters Abstracts International81-10.
Subject:	Mechanical engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27735569
ISBN:	9781658416009

Microplastic Detection Using Impedance Measurements in a Microfluidic Channel.
Mott, Vienna Laura.

Microplastic Detection Using Impedance Measurements in a Microfluidic Channel. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 73 p.

Source: Masters Abstracts International, Volume: 81-10.

Thesis (M.S.)--Tufts University, 2020.

This item must not be sold to any third party vendors.

Microplastics, polymer particles ranging in size from 1 μm to 1 mm in diameter, have been found throughout the world's oceans. However, scientific understanding of the global microplastics distribution has been limited by the cost, time, and resources needed to analyze aquatic samples for microplastics using state of the art analytical instruments. This thesis investigates use of impedance spectroscopy to identify microplastics in liquid samples using an inexpensive, compact microfluidic sensing device. The device is fabricated using a soft-lithography process that uses liquid electrodes as a substitute for costly metallization processes. Finite element simulations were performed to characterize the change in impedance caused by presence of microplastic particles within the chip's sensing zone over a range of frequencies, and the sensitivity of measurements to particle size. Our simulations suggest that microplastic particles ranging from 15-96% of the channel diameter would increase the capacitance by 0.1-0.15 fF, depending on the experimental conditions. Experiments indicate that the device can discriminate between different fluids based on their relative permittivity spectra. Though more sensitive instrumentation would be needed to identify individual microplastic particles, results suggest that microfluidic impedance spectroscopy holds promise for detecting microplastics in aquatic samples.

ISBN: 9781658416009Subjects--Topical Terms:

649730
Mechanical engineering.
Subjects--Index Terms:

Detection

Microplastic Detection Using Impedance Measurements in a Microfluidic Channel.
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245 1 0 $a Microplastic Detection Using Impedance Measurements in a Microfluidic Channel.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2020
300 $a 73 p.
500 $a Source: Masters Abstracts International, Volume: 81-10.
500 $a Advisor: White, Robert D.
502 $a Thesis (M.S.)--Tufts University, 2020.
506 $a This item must not be sold to any third party vendors.
520 $a Microplastics, polymer particles ranging in size from 1 μm to 1 mm in diameter, have been found throughout the world's oceans. However, scientific understanding of the global microplastics distribution has been limited by the cost, time, and resources needed to analyze aquatic samples for microplastics using state of the art analytical instruments. This thesis investigates use of impedance spectroscopy to identify microplastics in liquid samples using an inexpensive, compact microfluidic sensing device. The device is fabricated using a soft-lithography process that uses liquid electrodes as a substitute for costly metallization processes. Finite element simulations were performed to characterize the change in impedance caused by presence of microplastic particles within the chip's sensing zone over a range of frequencies, and the sensitivity of measurements to particle size. Our simulations suggest that microplastic particles ranging from 15-96% of the channel diameter would increase the capacitance by 0.1-0.15 fF, depending on the experimental conditions. Experiments indicate that the device can discriminate between different fluids based on their relative permittivity spectra. Though more sensitive instrumentation would be needed to identify individual microplastic particles, results suggest that microfluidic impedance spectroscopy holds promise for detecting microplastics in aquatic samples.
590 $a School code: 0234.
650 4 $a Mechanical engineering. $3 649730
650 4 $a Biomedical engineering. $3 535387
650 4 $a Ocean engineering. $3 660731
653 $a Detection
653 $a Identification
653 $a Impedance spectroscopy
653 $a Microfluidics
653 $a Microplastics
653 $a Permittivity
690 $a 0548
690 $a 0541
690 $a 0547
710 2 $a Tufts University. $b Mechanical Engineering. $3 1023777
773 0 $t Masters Abstracts International $g 81-10.
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793 $a English
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