Title |
Active Control of Silver Nanoparticles Spacing Using Dielectrophoresis for Surface-Enhanced Raman Scattering
|
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Published in |
Analytical Chemistry, April 2012
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DOI | 10.1021/ac203381n |
Pubmed ID | |
Authors |
Adam F. Chrimes, Khashayar Khoshmanesh, Paul R. Stoddart, Aminuddin A. Kayani, Arnan Mitchell, Hemant Daima, Vipul Bansal, Kourosh Kalantar-zadeh |
Abstract |
We demonstrate an active microfluidic platform that integrates dielectrophoresis for the control of silver nanoparticles spacing, as they flow in a liquid channel. By careful control of the nanoparticles spacing, we can effectively increase the surface-enhanced Raman scattering (SERS) signal intensity based on augmenting the number of SERS-active hot-spots, while avoiding irreversible aggregation of the particles. The system is benchmarked using dipicolinate (2,6-pyridinedicarboxylic acid) (DPA), which is a biomarker of Bacillus anthracis. The validity of the results is discussed using several complementing characterization scenarios. |
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Researcher | 10 | 16% |
Student > Master | 6 | 10% |
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Student > Bachelor | 4 | 7% |
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Other | 7 | 11% |
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