Induction and amplification of circular dichroism by coupling chiral molecules to achiral plasmonic nanostructured gold films
We present a study on the chiroptical activity modulation of plasmon–molecule hybrids composed of natural chiral molecules and nanostructured gold films. The deposition of chiral riboflavin (vitamin B2) molecules onto nanostructured gold films with varied sputtering time leads to a significant enhan...
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2025-06-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0270819 |
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| author | Xiao-Kang Zhong Kai-Xiang Liang Zhen-Long Dou Qu-Quan Wang Li Zhou |
| author_facet | Xiao-Kang Zhong Kai-Xiang Liang Zhen-Long Dou Qu-Quan Wang Li Zhou |
| author_sort | Xiao-Kang Zhong |
| collection | DOAJ |
| description | We present a study on the chiroptical activity modulation of plasmon–molecule hybrids composed of natural chiral molecules and nanostructured gold films. The deposition of chiral riboflavin (vitamin B2) molecules onto nanostructured gold films with varied sputtering time leads to a significant enhancement of extinction and a band shift in the localized surface plasmon resonances, along with fine tuning of the percolating threshold. More interestingly, the circular dichroism (CD) signals of riboflavin are remarkably amplified via plasmonic coupling. Furthermore, this interaction induces a new CD signal emerging around the extinction valley of the gold films in the hybridized system, which is caused by a long-range electromagnetic coupling both with localized surface plasmons and propagating surface plasmon polaritons. The chiral modulation of plasmonic coupling with natural chiral molecules underscores its promising application in the fields of chiral sensing and surface-enhanced spectroscopy. |
| format | Article |
| id | doaj-art-e8b51e98165d4b59955a05bf973f144e |
| institution | Matheson Library |
| issn | 2158-3226 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj-art-e8b51e98165d4b59955a05bf973f144e2025-07-02T17:30:57ZengAIP Publishing LLCAIP Advances2158-32262025-06-01156065108065108-710.1063/5.0270819Induction and amplification of circular dichroism by coupling chiral molecules to achiral plasmonic nanostructured gold filmsXiao-Kang Zhong0Kai-Xiang Liang1Zhen-Long Dou2Qu-Quan Wang3Li Zhou4Key Laboratory of Artificial Micro- and Nano-Structures of the Ministry of Education, Hubei Nuclear Solid Physics Key Laboratory, School of Physics and Technology, Wuhan University, Wuhan 430072, ChinaKey Laboratory of Artificial Micro- and Nano-Structures of the Ministry of Education, Hubei Nuclear Solid Physics Key Laboratory, School of Physics and Technology, Wuhan University, Wuhan 430072, ChinaKey Laboratory of Artificial Micro- and Nano-Structures of the Ministry of Education, Hubei Nuclear Solid Physics Key Laboratory, School of Physics and Technology, Wuhan University, Wuhan 430072, ChinaDepartment of Physics, State Key Laboratory of Quantum Functional Materials, and Guangdong Basic Research Center of Excellence for Quantum Science, Southern University of Science and Technology (SUSTech), Shenzhen 518055, ChinaKey Laboratory of Artificial Micro- and Nano-Structures of the Ministry of Education, Hubei Nuclear Solid Physics Key Laboratory, School of Physics and Technology, Wuhan University, Wuhan 430072, ChinaWe present a study on the chiroptical activity modulation of plasmon–molecule hybrids composed of natural chiral molecules and nanostructured gold films. The deposition of chiral riboflavin (vitamin B2) molecules onto nanostructured gold films with varied sputtering time leads to a significant enhancement of extinction and a band shift in the localized surface plasmon resonances, along with fine tuning of the percolating threshold. More interestingly, the circular dichroism (CD) signals of riboflavin are remarkably amplified via plasmonic coupling. Furthermore, this interaction induces a new CD signal emerging around the extinction valley of the gold films in the hybridized system, which is caused by a long-range electromagnetic coupling both with localized surface plasmons and propagating surface plasmon polaritons. The chiral modulation of plasmonic coupling with natural chiral molecules underscores its promising application in the fields of chiral sensing and surface-enhanced spectroscopy.http://dx.doi.org/10.1063/5.0270819 |
| spellingShingle | Xiao-Kang Zhong Kai-Xiang Liang Zhen-Long Dou Qu-Quan Wang Li Zhou Induction and amplification of circular dichroism by coupling chiral molecules to achiral plasmonic nanostructured gold films AIP Advances |
| title | Induction and amplification of circular dichroism by coupling chiral molecules to achiral plasmonic nanostructured gold films |
| title_full | Induction and amplification of circular dichroism by coupling chiral molecules to achiral plasmonic nanostructured gold films |
| title_fullStr | Induction and amplification of circular dichroism by coupling chiral molecules to achiral plasmonic nanostructured gold films |
| title_full_unstemmed | Induction and amplification of circular dichroism by coupling chiral molecules to achiral plasmonic nanostructured gold films |
| title_short | Induction and amplification of circular dichroism by coupling chiral molecules to achiral plasmonic nanostructured gold films |
| title_sort | induction and amplification of circular dichroism by coupling chiral molecules to achiral plasmonic nanostructured gold films |
| url | http://dx.doi.org/10.1063/5.0270819 |
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