Verification of quartz crystal microbalance array using vector network analyzer and openQCM
Quartz Crystal Microbalance (QCM) is a device that allows non-destructive measurements of r in situ reaction activities. In this article, an array comprising of six 3MHz QCM sensors in an array were characterized using a vector network analyzer and OpenQCM, a portable measuring instrument that m...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Institute of Advanced Engineering and Science (IAES)
2018
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/63998/ http://irep.iium.edu.my/63998/ http://irep.iium.edu.my/63998/ http://irep.iium.edu.my/63998/1/63998_Verification%20of%20quartz%20crystal%20microbalance%20array%20using%20vector%20network%20_new%20article.pdf http://irep.iium.edu.my/63998/2/63998_Verification%20of%20quartz%20crystal%20microbalance%20array%20using%20vector%20network%20_scopus.pdf |
| Summary: | Quartz Crystal Microbalance (QCM) is a device that allows non-destructive
measurements of r in situ reaction activities. In this article, an array
comprising of six 3MHz QCM sensors in an array were characterized using a
vector network analyzer and OpenQCM, a portable measuring instrument
that measures change in resonance frequency. Measurements of S21
transmission characteristics using the vector network analyzer provides the
resonance frequency and can also be used to derive the RLC equivalent
electrical circuit values of a resonant two-port network based on the
Butterworth-Van Dyke model. In this work, Rm, Lm, Cm and Co were obtained
via curve-fitting of the measurement results to the simulated results.
Measurements were done in triplicates to verify reproducibility for all 6
sensors. For comparison, measurements were also done using a portable,
open-source instrument, OpenQCM. The OpenQCM instrument directly
measures changes in resonance frequencies, making it ideal for biosensing
experiments, which correlate changes in mass with changes in resonance
frequencies. Comparison between resonance frequency measurements using
VNA and OpenQCM exhibit low percentage difference 0.2%. This QCM
sensor array has the potential of conducting real-time, point-of-care analyses
for detection of biological molecules. |
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