Elevated Ag nanohole arrays for high performance plasmonic sensors based on extraordinary optical transmission
Label-free molecular sensing is one of the most fascinating applications of recently fast developing plasmonics. However, the implementation of plasmonic sensors in modern analytical systems strongly demands high sensitivity. Herein, by combining colloidal lithography with subsequent isotropic chemi...
| Main Authors: | , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/96276 http://hdl.handle.net/10220/11508 |
| _version_ | 1826112677068406784 |
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| author | Li, Shuzhou Zhang, Xuemin Li, Zibo Ye, Shunsheng Wang, Tieqiang Wu, Shan Zhang, Junhu Cui, Liying Li, Anran Yang, Bai |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Li, Shuzhou Zhang, Xuemin Li, Zibo Ye, Shunsheng Wang, Tieqiang Wu, Shan Zhang, Junhu Cui, Liying Li, Anran Yang, Bai |
| author_sort | Li, Shuzhou |
| collection | NTU |
| description | Label-free molecular sensing is one of the most fascinating applications of recently fast developing plasmonics. However, the implementation of plasmonic sensors in modern analytical systems strongly demands high sensitivity. Herein, by combining colloidal lithography with subsequent isotropic chemical etching of an underlying glass substrate, we report the fabrication of elevated Ag nanohole arrays (EANAs) which exhibit the property of extraordinary optical transmission. Finite-difference time-domain calculations show that the optical properties of the EANAs behave as though floating above the substrate with no support whatsoever. Compared with the original Ag nanohole arrays directly attached to a glass substrate, the refractive index sensitivity of the EANAs increases to 648 nm/RIU from the original 252 nm/RIU. This greatly enhanced sensing performance makes the EANAs very attractive as a platform for plasmonic sensing systems. As a proof-of-concept, we corroborated these findings with the label-free detection of anti-human IgG using the as-prepared EANAs. |
| first_indexed | 2024-10-01T03:11:00Z |
| format | Journal Article |
| id | ntu-10356/96276 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:11:00Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/962762020-06-01T10:01:57Z Elevated Ag nanohole arrays for high performance plasmonic sensors based on extraordinary optical transmission Li, Shuzhou Zhang, Xuemin Li, Zibo Ye, Shunsheng Wang, Tieqiang Wu, Shan Zhang, Junhu Cui, Liying Li, Anran Yang, Bai School of Materials Science & Engineering Label-free molecular sensing is one of the most fascinating applications of recently fast developing plasmonics. However, the implementation of plasmonic sensors in modern analytical systems strongly demands high sensitivity. Herein, by combining colloidal lithography with subsequent isotropic chemical etching of an underlying glass substrate, we report the fabrication of elevated Ag nanohole arrays (EANAs) which exhibit the property of extraordinary optical transmission. Finite-difference time-domain calculations show that the optical properties of the EANAs behave as though floating above the substrate with no support whatsoever. Compared with the original Ag nanohole arrays directly attached to a glass substrate, the refractive index sensitivity of the EANAs increases to 648 nm/RIU from the original 252 nm/RIU. This greatly enhanced sensing performance makes the EANAs very attractive as a platform for plasmonic sensing systems. As a proof-of-concept, we corroborated these findings with the label-free detection of anti-human IgG using the as-prepared EANAs. 2013-07-16T02:42:53Z 2019-12-06T19:28:05Z 2013-07-16T02:42:53Z 2019-12-06T19:28:05Z 2012 2012 Journal Article Zhang, X., Li, Z., Ye, S., Wu, S., Zhang, J., Cui, L., et al. (2012). Elevated Ag nanohole arrays for high performance plasmonic sensors based on extraordinary optical transmission. Journal of Materials Chemistry, 22(18), 8903-8910. https://hdl.handle.net/10356/96276 http://hdl.handle.net/10220/11508 10.1039/c2jm30525a en Journal of materials chemistry © 2012 Royal Society of Chemistry. |
| spellingShingle | Li, Shuzhou Zhang, Xuemin Li, Zibo Ye, Shunsheng Wang, Tieqiang Wu, Shan Zhang, Junhu Cui, Liying Li, Anran Yang, Bai Elevated Ag nanohole arrays for high performance plasmonic sensors based on extraordinary optical transmission |
| title | Elevated Ag nanohole arrays for high performance plasmonic sensors based on extraordinary optical transmission |
| title_full | Elevated Ag nanohole arrays for high performance plasmonic sensors based on extraordinary optical transmission |
| title_fullStr | Elevated Ag nanohole arrays for high performance plasmonic sensors based on extraordinary optical transmission |
| title_full_unstemmed | Elevated Ag nanohole arrays for high performance plasmonic sensors based on extraordinary optical transmission |
| title_short | Elevated Ag nanohole arrays for high performance plasmonic sensors based on extraordinary optical transmission |
| title_sort | elevated ag nanohole arrays for high performance plasmonic sensors based on extraordinary optical transmission |
| url | https://hdl.handle.net/10356/96276 http://hdl.handle.net/10220/11508 |
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