Label-free binding analysis of 4-(2-Pyridylazo)-resorcinol-based composite layer with cobalt ion using surface plasmon resonance optical sensor
Label-free measurements of small-molecule binding interactions are of high interest to researchers across multiple scientific disciplines. Label-free optical sensors based on surface plasmon resonance (SPR) have been widely used for detecting various targets including toxic heavy metals in solutions...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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M Y U Scientific Publishing Division
2020
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| Online Access: | http://psasir.upm.edu.my/id/eprint/89537/1/COBALT.pdf |
| _version_ | 1796982177626324992 |
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| author | Saleviter, Silvan Yap, Wing Fen Sheh Omar, Nur Alia Mohd Daniyal, Wan Mohd Ebtisyam Mustaqim Abdullah, Jaafar Mahdi, Mohd Adzir |
| author_facet | Saleviter, Silvan Yap, Wing Fen Sheh Omar, Nur Alia Mohd Daniyal, Wan Mohd Ebtisyam Mustaqim Abdullah, Jaafar Mahdi, Mohd Adzir |
| author_sort | Saleviter, Silvan |
| collection | UPM |
| description | Label-free measurements of small-molecule binding interactions are of high interest to researchers across multiple scientific disciplines. Label-free optical sensors based on surface plasmon resonance (SPR) have been widely used for detecting various targets including toxic heavy metals in solutions. In this research, an SPR optical sensor enhanced with a 4-(2-pyridylazo)-resorcinol (PAR)-based composite layer was employed for the detection of the cobalt ion (Co2+). A binding analysis study was conducted by monitoring the interaction between Co2+ and the sensing layer thin film. In our experiment, there were no changes in SPR angle for a gold layer in contact with Co2+ of different concentrations, whereas the enhanced SPR sensor produced a maximum SPR angle shift of 0.328°. From the relationship between the angle shift and the concentration of Co2+, the sensor had a sensitivity of 0.2375° ppm−1 for concentrations of less than 1 ppm, 0.0044° ppm−1 for concentrations of 1 to 10 ppm, and 0.00069° ppm−1 for concentrations from 10 to 100 ppm. Further analysis was also carried out by calculating the full width at half maximum (FWHM), detection accuracy (DA), and signal-to-noise ratio (SNR). In the binding analysis, the experimental results were fitted with Langmuir, Freundlich, and Sips isotherm equations. It was found that the Sips isotherm equation most closely fitted the experimental data with an R2 value of 0.96716 and a binding affinity of 1.649 ppm−1. |
| first_indexed | 2024-03-06T10:48:11Z |
| format | Article |
| id | upm.eprints-89537 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T10:48:11Z |
| publishDate | 2020 |
| publisher | M Y U Scientific Publishing Division |
| record_format | dspace |
| spelling | upm.eprints-895372021-09-17T22:49:10Z http://psasir.upm.edu.my/id/eprint/89537/ Label-free binding analysis of 4-(2-Pyridylazo)-resorcinol-based composite layer with cobalt ion using surface plasmon resonance optical sensor Saleviter, Silvan Yap, Wing Fen Sheh Omar, Nur Alia Mohd Daniyal, Wan Mohd Ebtisyam Mustaqim Abdullah, Jaafar Mahdi, Mohd Adzir Label-free measurements of small-molecule binding interactions are of high interest to researchers across multiple scientific disciplines. Label-free optical sensors based on surface plasmon resonance (SPR) have been widely used for detecting various targets including toxic heavy metals in solutions. In this research, an SPR optical sensor enhanced with a 4-(2-pyridylazo)-resorcinol (PAR)-based composite layer was employed for the detection of the cobalt ion (Co2+). A binding analysis study was conducted by monitoring the interaction between Co2+ and the sensing layer thin film. In our experiment, there were no changes in SPR angle for a gold layer in contact with Co2+ of different concentrations, whereas the enhanced SPR sensor produced a maximum SPR angle shift of 0.328°. From the relationship between the angle shift and the concentration of Co2+, the sensor had a sensitivity of 0.2375° ppm−1 for concentrations of less than 1 ppm, 0.0044° ppm−1 for concentrations of 1 to 10 ppm, and 0.00069° ppm−1 for concentrations from 10 to 100 ppm. Further analysis was also carried out by calculating the full width at half maximum (FWHM), detection accuracy (DA), and signal-to-noise ratio (SNR). In the binding analysis, the experimental results were fitted with Langmuir, Freundlich, and Sips isotherm equations. It was found that the Sips isotherm equation most closely fitted the experimental data with an R2 value of 0.96716 and a binding affinity of 1.649 ppm−1. M Y U Scientific Publishing Division 2020 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/89537/1/COBALT.pdf Saleviter, Silvan and Yap, Wing Fen and Sheh Omar, Nur Alia and Mohd Daniyal, Wan Mohd Ebtisyam Mustaqim and Abdullah, Jaafar and Mahdi, Mohd Adzir (2020) Label-free binding analysis of 4-(2-Pyridylazo)-resorcinol-based composite layer with cobalt ion using surface plasmon resonance optical sensor. Sensors and Materials, 32 (9 (1)). 2877 - 2889. ISSN 0914-4935 https://myukk.org/SM2017/article.php?ss=2858 10.18494/SAM.2020.2858 |
| spellingShingle | Saleviter, Silvan Yap, Wing Fen Sheh Omar, Nur Alia Mohd Daniyal, Wan Mohd Ebtisyam Mustaqim Abdullah, Jaafar Mahdi, Mohd Adzir Label-free binding analysis of 4-(2-Pyridylazo)-resorcinol-based composite layer with cobalt ion using surface plasmon resonance optical sensor |
| title | Label-free binding analysis of 4-(2-Pyridylazo)-resorcinol-based composite layer with cobalt ion using surface plasmon resonance optical sensor |
| title_full | Label-free binding analysis of 4-(2-Pyridylazo)-resorcinol-based composite layer with cobalt ion using surface plasmon resonance optical sensor |
| title_fullStr | Label-free binding analysis of 4-(2-Pyridylazo)-resorcinol-based composite layer with cobalt ion using surface plasmon resonance optical sensor |
| title_full_unstemmed | Label-free binding analysis of 4-(2-Pyridylazo)-resorcinol-based composite layer with cobalt ion using surface plasmon resonance optical sensor |
| title_short | Label-free binding analysis of 4-(2-Pyridylazo)-resorcinol-based composite layer with cobalt ion using surface plasmon resonance optical sensor |
| title_sort | label free binding analysis of 4 2 pyridylazo resorcinol based composite layer with cobalt ion using surface plasmon resonance optical sensor |
| url | http://psasir.upm.edu.my/id/eprint/89537/1/COBALT.pdf |
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