Optical property analysis of chitosan-graphene quantum dots thin film and dopamine using surface plasmon resonance spectroscopy
In this study, surface plasmon resonance (SPR) technique has been utilized to characterize the optical properties of chitosan-graphene quantum dots (CS-GQDs) thin film and dopamine (DA). Theoretical fitting of SPR dips yielded refractive indices of DA solutions and CS-GQDs thin films, as well as the...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Published: |
Springer New York
2022
|
| Online Access: | http://psasir.upm.edu.my/id/eprint/102397/ |
| _version_ | 1848863792940711936 |
|---|---|
| author | Kamal Eddin, Faten Bashar Yap, Wing Fen Sadrolhosseini, Amir Reza Liew, Josephine Ying Chyi Mohd Daniyal, Wan Mohd Ebtisyam Mustaqim |
| author_facet | Kamal Eddin, Faten Bashar Yap, Wing Fen Sadrolhosseini, Amir Reza Liew, Josephine Ying Chyi Mohd Daniyal, Wan Mohd Ebtisyam Mustaqim |
| author_sort | Kamal Eddin, Faten Bashar |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | In this study, surface plasmon resonance (SPR) technique has been utilized to characterize the optical properties of chitosan-graphene quantum dots (CS-GQDs) thin film and dopamine (DA). Theoretical fitting of SPR dips yielded refractive indices of DA solutions and CS-GQDs thin films, as well as the thickness of the thin film. For DA solution, n and k values were the same as deionized water for all concentrations. The values of n and k for CS-GQDs thin film were 1.6990 and 0.1302 respectively before contacting DA. The experimental SPR reflectance curves obtained using CS-GQDs thin film were shifted continuously to the right with increasing DA concentrations. After adsorption of DA molecules, both n and thickness of the CS-GQDs thin film increased, while the value of k decreased. This, in turns, enhanced the SPR sensitivity towards DA. The obtained results underscore the appropriate and sufficient potential of the used technique to measure refractive index variations in real-time when very low concentration was used (1 fM) with refractive index sensitivity of 10.186°/RIU. |
| first_indexed | 2025-11-15T13:38:33Z |
| format | Article |
| id | upm-102397 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T13:38:33Z |
| publishDate | 2022 |
| publisher | Springer New York |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1023972023-05-18T03:17:48Z http://psasir.upm.edu.my/id/eprint/102397/ Optical property analysis of chitosan-graphene quantum dots thin film and dopamine using surface plasmon resonance spectroscopy Kamal Eddin, Faten Bashar Yap, Wing Fen Sadrolhosseini, Amir Reza Liew, Josephine Ying Chyi Mohd Daniyal, Wan Mohd Ebtisyam Mustaqim In this study, surface plasmon resonance (SPR) technique has been utilized to characterize the optical properties of chitosan-graphene quantum dots (CS-GQDs) thin film and dopamine (DA). Theoretical fitting of SPR dips yielded refractive indices of DA solutions and CS-GQDs thin films, as well as the thickness of the thin film. For DA solution, n and k values were the same as deionized water for all concentrations. The values of n and k for CS-GQDs thin film were 1.6990 and 0.1302 respectively before contacting DA. The experimental SPR reflectance curves obtained using CS-GQDs thin film were shifted continuously to the right with increasing DA concentrations. After adsorption of DA molecules, both n and thickness of the CS-GQDs thin film increased, while the value of k decreased. This, in turns, enhanced the SPR sensitivity towards DA. The obtained results underscore the appropriate and sufficient potential of the used technique to measure refractive index variations in real-time when very low concentration was used (1 fM) with refractive index sensitivity of 10.186°/RIU. Springer New York 2022-06-27 Article PeerReviewed Kamal Eddin, Faten Bashar and Yap, Wing Fen and Sadrolhosseini, Amir Reza and Liew, Josephine Ying Chyi and Mohd Daniyal, Wan Mohd Ebtisyam Mustaqim (2022) Optical property analysis of chitosan-graphene quantum dots thin film and dopamine using surface plasmon resonance spectroscopy. Plasmonics, 17. 1985 - 9197. ISSN 1557-1955; ESSN: 1557-1963 https://link.springer.com/article/10.1007/s11468-022-01680-1 10.1007/s11468-022-01680-1 |
| spellingShingle | Kamal Eddin, Faten Bashar Yap, Wing Fen Sadrolhosseini, Amir Reza Liew, Josephine Ying Chyi Mohd Daniyal, Wan Mohd Ebtisyam Mustaqim Optical property analysis of chitosan-graphene quantum dots thin film and dopamine using surface plasmon resonance spectroscopy |
| title | Optical property analysis of chitosan-graphene quantum dots thin film and dopamine using surface plasmon resonance spectroscopy |
| title_full | Optical property analysis of chitosan-graphene quantum dots thin film and dopamine using surface plasmon resonance spectroscopy |
| title_fullStr | Optical property analysis of chitosan-graphene quantum dots thin film and dopamine using surface plasmon resonance spectroscopy |
| title_full_unstemmed | Optical property analysis of chitosan-graphene quantum dots thin film and dopamine using surface plasmon resonance spectroscopy |
| title_short | Optical property analysis of chitosan-graphene quantum dots thin film and dopamine using surface plasmon resonance spectroscopy |
| title_sort | optical property analysis of chitosan-graphene quantum dots thin film and dopamine using surface plasmon resonance spectroscopy |
| url | http://psasir.upm.edu.my/id/eprint/102397/ http://psasir.upm.edu.my/id/eprint/102397/ http://psasir.upm.edu.my/id/eprint/102397/ |