Highly sensitive SPR response of Au/chitosan/graphene oxide nanostructured thin films toward Pb (II) ions
Optical sensors based on surface plasmon resonance (SPR) are utilized for detecting toxic heavy metals in solutions. To improve the sensitivity of SPR sensors, nanostructured thin films with active layers can be synthesized. In this study, the response to Pb (II) was measured and compared for SPR se...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2014
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| Online Access: | http://psasir.upm.edu.my/id/eprint/37865/ http://psasir.upm.edu.my/id/eprint/37865/1/Highly%20sensitive%20SPR%20response%20of%20Au.pdf |
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| author | Lokman, Nurul Fariha Abu Bakar, Ahmad Ashrif Suja, Fatihah Abdullah, Huda Wan Ab Rahman, Wan Baihaqi Huang, Nay Ming Yaacob, Mohd. Hanif |
| author_facet | Lokman, Nurul Fariha Abu Bakar, Ahmad Ashrif Suja, Fatihah Abdullah, Huda Wan Ab Rahman, Wan Baihaqi Huang, Nay Ming Yaacob, Mohd. Hanif |
| author_sort | Lokman, Nurul Fariha |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Optical sensors based on surface plasmon resonance (SPR) are utilized for detecting toxic heavy metals in solutions. To improve the sensitivity of SPR sensors, nanostructured thin films with active layers can be synthesized. In this study, the response to Pb (II) was measured and compared for SPR sensors incorporating gold–chitosan–graphene oxide (Au/CS/GO) nanostructured thin films and Au/CS films. The characterization of Au/CS/GO using FESEM analysis revealed a film composed of nanosheets with wrinkled, rough surfaces. The results from XRD analysis confirmed the successful incorporation of GO in the prepared films. Additionally, AFM analysis determined that the Au/CS/GO films had a root mean square (rms) roughness of 28.38 nm and were considerably rougher than the Au/CS films. Upon exposure to a 5 ppm Pb (II) ion solution, the Au/CS/GO films exhibited higher SPR sensitivity, as much as 1.11200 ppm−1, than Au/CS films, 0.77600 ppm−1. This enhancement of the SPR response was attributed to strong covalent bonding between CS and GO in these films. These results indicated that the Au/CS/GO films show potential for the detection of heavy metal pollution in environmental applications. |
| first_indexed | 2025-11-15T09:39:00Z |
| format | Article |
| id | upm-37865 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T09:39:00Z |
| publishDate | 2014 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-378652015-10-01T02:17:06Z http://psasir.upm.edu.my/id/eprint/37865/ Highly sensitive SPR response of Au/chitosan/graphene oxide nanostructured thin films toward Pb (II) ions Lokman, Nurul Fariha Abu Bakar, Ahmad Ashrif Suja, Fatihah Abdullah, Huda Wan Ab Rahman, Wan Baihaqi Huang, Nay Ming Yaacob, Mohd. Hanif Optical sensors based on surface plasmon resonance (SPR) are utilized for detecting toxic heavy metals in solutions. To improve the sensitivity of SPR sensors, nanostructured thin films with active layers can be synthesized. In this study, the response to Pb (II) was measured and compared for SPR sensors incorporating gold–chitosan–graphene oxide (Au/CS/GO) nanostructured thin films and Au/CS films. The characterization of Au/CS/GO using FESEM analysis revealed a film composed of nanosheets with wrinkled, rough surfaces. The results from XRD analysis confirmed the successful incorporation of GO in the prepared films. Additionally, AFM analysis determined that the Au/CS/GO films had a root mean square (rms) roughness of 28.38 nm and were considerably rougher than the Au/CS films. Upon exposure to a 5 ppm Pb (II) ion solution, the Au/CS/GO films exhibited higher SPR sensitivity, as much as 1.11200 ppm−1, than Au/CS films, 0.77600 ppm−1. This enhancement of the SPR response was attributed to strong covalent bonding between CS and GO in these films. These results indicated that the Au/CS/GO films show potential for the detection of heavy metal pollution in environmental applications. Elsevier 2014-05 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/37865/1/Highly%20sensitive%20SPR%20response%20of%20Au.pdf Lokman, Nurul Fariha and Abu Bakar, Ahmad Ashrif and Suja, Fatihah and Abdullah, Huda and Wan Ab Rahman, Wan Baihaqi and Huang, Nay Ming and Yaacob, Mohd. Hanif (2014) Highly sensitive SPR response of Au/chitosan/graphene oxide nanostructured thin films toward Pb (II) ions. Sensors and Actuators B: Chemical, 195. pp. 459-466. ISSN 0925-4005; ESSN: 1873-3077 http://www.sciencedirect.com/science/article/pii/S0925400514000914 10.1016/j.snb.2014.01.074 |
| spellingShingle | Lokman, Nurul Fariha Abu Bakar, Ahmad Ashrif Suja, Fatihah Abdullah, Huda Wan Ab Rahman, Wan Baihaqi Huang, Nay Ming Yaacob, Mohd. Hanif Highly sensitive SPR response of Au/chitosan/graphene oxide nanostructured thin films toward Pb (II) ions |
| title | Highly sensitive SPR response of Au/chitosan/graphene oxide nanostructured thin films toward Pb (II) ions |
| title_full | Highly sensitive SPR response of Au/chitosan/graphene oxide nanostructured thin films toward Pb (II) ions |
| title_fullStr | Highly sensitive SPR response of Au/chitosan/graphene oxide nanostructured thin films toward Pb (II) ions |
| title_full_unstemmed | Highly sensitive SPR response of Au/chitosan/graphene oxide nanostructured thin films toward Pb (II) ions |
| title_short | Highly sensitive SPR response of Au/chitosan/graphene oxide nanostructured thin films toward Pb (II) ions |
| title_sort | highly sensitive spr response of au/chitosan/graphene oxide nanostructured thin films toward pb (ii) ions |
| url | http://psasir.upm.edu.my/id/eprint/37865/ http://psasir.upm.edu.my/id/eprint/37865/ http://psasir.upm.edu.my/id/eprint/37865/ http://psasir.upm.edu.my/id/eprint/37865/1/Highly%20sensitive%20SPR%20response%20of%20Au.pdf |