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Microplastic Detection Using Impedance Measurements in a Microfluidic Channel.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Microplastic Detection Using Impedance Measurements in a Microfluidic Channel./
作者:	Mott, Vienna Laura.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
面頁冊數:	73 p.
附註:	Source: Masters Abstracts International, Volume: 81-10.
Contained By:	Masters Abstracts International81-10.
標題:	Mechanical engineering. -
電子資源:	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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