Spectroscopic Identification of Charge Transfer of Thiolated Molecules on Gold Nanoparticles via Gold Nanoclusters
Description
Investigation of charge transfer needs analytical tools that could reveal this phenomenon, and enables understanding of its effect at the molecular level. Here, we show how the combination of using gold nanoclusters (AuNCs) and different spectroscopic techniques could be employed to investigate the charge transfer of thiolated molecules on gold nanoparticles (AuNP@Mol). It was found that the charge transfer effect in the thiolated molecule could be affected by AuNCs, evidenced by the amplification of surface-enhanced Raman scattering (SERS) signal of the molecule and changes in fluorescence lifetime of AuNCs. Density functional theory (DFT) calculations further revealed that AuNCs could amplify the charge transfer process at the molecular level by pumping electrons to the surface of AuNPs. Finite element method (FEM) simulations also showed that the electromagnetic enhancement mechanism along with chemical enhancement determines the SERS improvement in the thiolated molecule. This study provides a mechanistic insight into the investigation of charge transfer at the molecular level between organic and inorganic compounds, which is of great importance in designing new nanocomposite systems. Additionally, this work demonstrates the potential of SERS as a powerful analytical tool that could be used in nanochemistry, material science, energy, and biomedical fields.
Impact and interest:
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ID Code: | 247217 | ||||||
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Item Type: | Contribution to Journal (Journal Article) | ||||||
Refereed: | Yes | ||||||
ORCID iD: |
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Measurements or Duration: | 11 pages | ||||||
DOI: | 10.1021/jacs.3c11959 | ||||||
ISSN: | 0002-7863 | ||||||
Pure ID: | 164680688 | ||||||
Divisions: | Current > QUT Faculties and Divisions > Faculty of Engineering Current > Schools > School of Mechanical, Medical & Process Engineering |
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Funding Information: | We would like to appreciate A/Prof. Koushik Venkatesan and Aarti Rajotiya for their support in measuring fluorescence lifetime of samples. We would like to acknowledge Dr. Su Su Thae Hnit for her valuable support in performing the statistical analysis on data. M.T.Y. would like to acknowledge Macquarie University to support this work through Macquarie University Research Fellowship (MQRF). The authors would like to acknowledge the Macquarie University Faculty of Science and Engineering Microscopy Unit for access to its instrumentation and staff. This work was supported by the Australian Research Council (ARC) through the Discovery Projects (DP200102004), and ARC Future Fellowship (FT210100737) to Y.W. | ||||||
Copyright Owner: | 2024 American Chemical Society | ||||||
Copyright Statement: | This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au | ||||||
Deposited On: | 13 Mar 2024 01:59 | ||||||
Last Modified: | 07 Aug 2024 19:00 |
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