Local Refractive Index Sensing Based on Edge Gold-Coated Silver Nanoprisms
Bulk and surface refractive index sensitivity for localized surface plasmon resonance (LSPR) sensing based on edge gold-coated silver nanoprisms (GSNPs) and gold nanospheres was investigated and compared with conventional surface plasmon resonance (SPR) sensing based on propagating surface plasmons....
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2016
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| Online Access: | https://hdl.handle.net/10356/82204 http://hdl.handle.net/10220/39847 |
| _version_ | 1811686329946210304 |
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| author | Martinsson, Erik Shahjamali, Mohammad Mehdi Enander, Karin Boey, Freddy Xue, Can Aili, Daniel Liedberg, Bo |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Martinsson, Erik Shahjamali, Mohammad Mehdi Enander, Karin Boey, Freddy Xue, Can Aili, Daniel Liedberg, Bo |
| author_sort | Martinsson, Erik |
| collection | NTU |
| description | Bulk and surface refractive index sensitivity for localized surface plasmon resonance (LSPR) sensing based on edge gold-coated silver nanoprisms (GSNPs) and gold nanospheres was investigated and compared with conventional surface plasmon resonance (SPR) sensing based on propagating surface plasmons. The hybrid GSNPs benefit from an improved stability since the gold frame protecting the unstable silver facets located at the silver nanoprisms (SNPs) edges and tips prevents truncation or rounding of their sharp tips or edges, maintaining a high refractive index sensitivity even under harsh conditions. By using layer-by-layer deposition of polyelectrolytes and protein adsorption, we found that GSNPs exhibit 4-fold higher local refractive index sensitivity in close proximity (<10 nm) to the surface compared to a flat gold film in the conventional SPR setup. Moreover, the sensitivity was 8-fold higher with GSNPs than with gold nanospheres. This shows that relatively simple plasmonic nanostructures for LSPR-based sensing can be engineered to outperform conventional SPR, which is particularly interesting in the context of detecting low molecular weight compounds where a small sensing volume, reducing bulk signals, is desired. |
| first_indexed | 2024-10-01T04:58:42Z |
| format | Journal Article |
| id | ntu-10356/82204 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:58:42Z |
| publishDate | 2016 |
| record_format | dspace |
| spelling | ntu-10356/822042023-07-14T15:45:45Z Local Refractive Index Sensing Based on Edge Gold-Coated Silver Nanoprisms Martinsson, Erik Shahjamali, Mohammad Mehdi Enander, Karin Boey, Freddy Xue, Can Aili, Daniel Liedberg, Bo School of Materials Science & Engineering Centre for Biomimetic Sensor Science Gold-coated silver nanoprisms Polyelectrolytes Localized surface plasmon resonance (LSPR) Surface plasmon resonance (SPR) Biosensor Refractive index sensing Bulk and surface refractive index sensitivity for localized surface plasmon resonance (LSPR) sensing based on edge gold-coated silver nanoprisms (GSNPs) and gold nanospheres was investigated and compared with conventional surface plasmon resonance (SPR) sensing based on propagating surface plasmons. The hybrid GSNPs benefit from an improved stability since the gold frame protecting the unstable silver facets located at the silver nanoprisms (SNPs) edges and tips prevents truncation or rounding of their sharp tips or edges, maintaining a high refractive index sensitivity even under harsh conditions. By using layer-by-layer deposition of polyelectrolytes and protein adsorption, we found that GSNPs exhibit 4-fold higher local refractive index sensitivity in close proximity (<10 nm) to the surface compared to a flat gold film in the conventional SPR setup. Moreover, the sensitivity was 8-fold higher with GSNPs than with gold nanospheres. This shows that relatively simple plasmonic nanostructures for LSPR-based sensing can be engineered to outperform conventional SPR, which is particularly interesting in the context of detecting low molecular weight compounds where a small sensing volume, reducing bulk signals, is desired. ASTAR (Agency for Sci., Tech. and Research, S’pore) MOE (Min. of Education, S’pore) Accepted version 2016-01-29T06:45:43Z 2019-12-06T14:48:33Z 2016-01-29T06:45:43Z 2019-12-06T14:48:33Z 2013 Journal Article Martinsson, E., Shahjamali, M. M., Enander, K., Boey, F., Xue, C., Aili, D., et al. (2013). Local Refractive Index Sensing Based on Edge Gold-Coated Silver Nanoprisms. The Journal of Physical Chemistry C, 117(44), 23148-23154. 1932-7447 https://hdl.handle.net/10356/82204 http://hdl.handle.net/10220/39847 10.1021/jp408187e en The Journal of Physical Chemistry C © 2013 American Chemical Society. This is the author created version of a work that has been peer reviewed and accepted for publication by The Journal of Physical Chemistry C, American Chemical Society. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1021/jp408187e]. 31 p. application/pdf |
| spellingShingle | Gold-coated silver nanoprisms Polyelectrolytes Localized surface plasmon resonance (LSPR) Surface plasmon resonance (SPR) Biosensor Refractive index sensing Martinsson, Erik Shahjamali, Mohammad Mehdi Enander, Karin Boey, Freddy Xue, Can Aili, Daniel Liedberg, Bo Local Refractive Index Sensing Based on Edge Gold-Coated Silver Nanoprisms |
| title | Local Refractive Index Sensing Based on Edge Gold-Coated Silver Nanoprisms |
| title_full | Local Refractive Index Sensing Based on Edge Gold-Coated Silver Nanoprisms |
| title_fullStr | Local Refractive Index Sensing Based on Edge Gold-Coated Silver Nanoprisms |
| title_full_unstemmed | Local Refractive Index Sensing Based on Edge Gold-Coated Silver Nanoprisms |
| title_short | Local Refractive Index Sensing Based on Edge Gold-Coated Silver Nanoprisms |
| title_sort | local refractive index sensing based on edge gold coated silver nanoprisms |
| topic | Gold-coated silver nanoprisms Polyelectrolytes Localized surface plasmon resonance (LSPR) Surface plasmon resonance (SPR) Biosensor Refractive index sensing |
| url | https://hdl.handle.net/10356/82204 http://hdl.handle.net/10220/39847 |
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