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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.0c01793
|2 doi
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|a pubmed24n1045.xml
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|a eng
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|a Huong, Vu Thi
|e verfasserin
|4 aut
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|a Bimetallic Thin-Film Combination of Surface Plasmon Resonance-Based Optical Fiber Cladding with the Polarizing Homodyne Balanced Detection Method and Biomedical Assay Application
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|c 2020
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|a Text
|b txt
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 29.09.2020
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|a Date Revised 29.09.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a In this work, we present the optical birefringence properties of the optical fiber cladding that exists as an evanescent field where the refractive index (RI) of the analysis solution is applied for optical sensor aspiration. To enhance the performance of the sensor, we have investigated the sensor with different thicknesses of TiO2 coating and bimetallic (Ag-Al) film alloy combinations by thermal evaporation coating. We described a special balanced homodyne detection method for the intensity difference change between the p- and s-polarization lights in the surface plasmon resonance sensing systems, which is strongly determined by the RI of the test medium. The plasmonic optical fiber can measure a very small change of the RI of a glycerol solution, which is a resolution of 4.37 × 10-8 RI unit (RIU). This method has great advantages of a small-sized optical setup, high stability, high selectivity, easy chemical modification, and low cost. Furthermore, because of the experiment results, we observe that our approach can also eliminate the surrounding noise in the Mach-Zehnder interferometer, which shows the feasibility of this proposed technique. We demonstrate the fluorescence enhancement in detecting the C-reactive protein antibody conjugated with fluorescein isothiocyanate by means of near-field coupling between surface plasmons and fluorophores at spectral channels of emission. This technique can also be extended for application in a biomedical assay and in biochemical science, including molecular diagnostics relying on multichannels that require a small volume of the analyte at each channel which would suffer from the weakness of fluorescence if it were not for the enhancement technology
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Van Tran, Vinh
|e verfasserin
|4 aut
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|a Lee, Nae Yoon
|e verfasserin
|4 aut
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|a Van Hoang, Dung
|e verfasserin
|4 aut
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|a Loan Trinh, Kieu The
|e verfasserin
|4 aut
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|a Phan, Thang Bach
|e verfasserin
|4 aut
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|a Thi Tran, Nhu Hoa
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 36(2020), 33 vom: 25. Aug., Seite 9967-9976
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|x 1520-5827
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|g volume:36
|g year:2020
|g number:33
|g day:25
|g month:08
|g pages:9967-9976
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|u http://dx.doi.org/10.1021/acs.langmuir.0c01793
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