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  4. Multi-Layer Reflectivity Calculation Based Meta-Modeling of the Phase Mapping Function for Highly Reproducible Surface Plasmon Resonance Biosensing
 
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Multi-Layer Reflectivity Calculation Based Meta-Modeling of the Phase Mapping Function for Highly Reproducible Surface Plasmon Resonance Biosensing

Journal
Biosensors
Journal Volume
11
Journal Issue
3
Date Issued
2021
Author(s)
Wu T.-H
Yang C.-H
Chang C.-C
Liu H.-W
Yang C.-Y
CHII-WANN LIN  
TANG-LONG SHEN  
DOI
10.3390/bios11030095
URI
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85103920059&doi=10.3390%2fbios11030095&partnerID=40&md5=5b148d9f6af3dca2a1785726aea0110d
https://scholars.lib.ntu.edu.tw/handle/123456789/580739
Abstract
Phase-sensitive surface plasmon resonance biosensors are known for their high sensitivity. One of the technology bottle-necks of such sensors is that the phase sensorgram, when measured at fixed angle set-up, can lead to low reproducibility as the signal conveys multiple data. Leveraging the sensitivity, while securing satisfying reproducibility, is therefore is an underdiscussed key issue. One potential solution is to map the phase sensorgram into refractive index unit by the use of sensor calibration data, via a simple non-linear fit. However, basic fitting functions poorly portray the asymmetric phase curve. On the other hand, multi-layer reflectivity calculation based on the Fresnel coefficient can be employed for a precise mapping function. This numerical approach however lacks the explicit mathematical formulation to be used in an optimization process. To this end, we aim to provide a first methodology for the issue, where mapping functions are constructed from Bayesian optimized multi-layer model of the experimental data. The challenge of using multi-layer model as optimization trial function is addressed by meta-modeling via segmented polynomial approximation. A visualization approach is proposed for assessment of the goodness-of-the-fit on the optimized model. Using metastatic cancer exosome sensing, we demonstrate how the present work paves the way toward better plasmonic sensors.
Subjects
algorithm; Bayes theorem; equipment design; genetic procedures; refractometry; reproducibility; surface plasmon resonance; Algorithms; Bayes Theorem; Biosensing Techniques; Equipment Design; Refractometry; Reproducibility of Results; Surface Plasmon Resonance
SDGs

[SDGs]SDG3

Other Subjects
aptamer; algorithm; Article; Bayes theorem; cell communication; controlled study; exosome; human; human cell; methodology; model; molecular probe; process optimization; surface plasmon resonance; equipment design; genetic procedures; refractometry; reproducibility; Algorithms; Bayes Theorem; Biosensing Techniques; Equipment Design; Refractometry; Reproducibility of Results; Surface Plasmon Resonance
Type
journal article

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