Robustness and repeatability of interdigitated electrodes on a substrate tested in an aqueous environment
Name
775601381-MIT.pdf
Description
Full printable version
Size
9.75 MB
Format
Adobe PDF
Checksum (MD5)
0de3b80eb1675b9230cd7a42500ee9ed
Author(s)
Holmes, Jacklyn (Jacklyn A.)
Advisor(s)
Brian W. Anthony.
Date Issued
2011
Publisher
Massachusetts Institute of Technology
Abstract
Interdigitated electrodes are currently being used as sensing components in microfluidic lab-on-a-chip devices. The Daktari Diagnostics system uses these electrodes to measure the change in impedance of a fluid in an assay chamber. In order to improve quality assurance, a new testing method was developed and validated to characterize the sources of potential defects in the electrodes. In the new test, the electrodes are used to measure the impedance when placed in solutions of different known conductivities. The data was used to estimate the linear relationship between the inverse of the measured impedance to the solution conductivities. The repeatability tests found an average slope of 1.438x10-5 cm/characteristic length with a standard deviation of 8.52x10 -8 cm/characteristic length. It was found that the number of defective fingers or bending the electrodes significantly changes the electrode performance with a 95% confidence interval.
Description
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2011.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 75-77).
Subjects
Mechanical Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
M.I.T. theses are protected by
copyright. They may be viewed from this source for any purpose, but
reproduction or distribution in any format is prohibited without written
permission. See provided URL for inquiries about permission.
copyright. They may be viewed from this source for any purpose, but
reproduction or distribution in any format is prohibited without written
permission. See provided URL for inquiries about permission.
Persistent DSpace Link
