Plasmonic Enhancement in the Fluorescence of Organic and Biological Molecules by Photovoltaic Tweezing Assembly

The potential of photovoltaic tweezers to produce plasmonic platforms for fluorescence enhancement of organic or biological molecules is demonstrated. 1D and 2D patterns of silver nanoparticles are produced on the surface of LiNbO3:Fe substrates using this photovoltaic tool, which allows depositing...

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Bibliographic Details
Published in:Advanced materials technologies 2017-08, Vol.2 (8), p.n/a
Main Authors: Elvira, Iris, Muñoz‐Martínez, Juan F., Jubera, Mariano, García‐Cabañes, Angel, Bella, José L., Haro‐González, Patricia, Díaz‐García, María A., Agulló‐López, Fernando, Carrascosa, Mercedes
Format: Article
Language:English
Subjects:
bulk‐photovoltaic effect
enhanced biomolecule fluorescence
nanoparticle optical manipulation
optoelectronic tweezers
plasmonic luminescence enhancement
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Summary:The potential of photovoltaic tweezers to produce plasmonic platforms for fluorescence enhancement of organic or biological molecules is demonstrated. 1D and 2D patterns of silver nanoparticles are produced on the surface of LiNbO3:Fe substrates using this photovoltaic tool, which allows depositing in parallel a large number of particles in accordance with imposed 1D and 2D light profiles. The nanoparticle patterns reveal a variety of plasmonic features whose resonances cover a broad spectral range and are able to produce efficient fluorescence enhancement. First, a remarkable average enhancement factor of ten is measured for Disperse Red 1 organic molecules deposited on the patterns. Clear enhancements are also obtained from fluorescein labeled biological molecules (DNA and asynthetic peptide). Finally, the possibility of using the photoelectrically generated metallic patterns with other substrates is also demonstrated by enhancement experiments for which the nanoparticle pattern is transferred to a non‐photovoltaic substrate. Photovoltaic tweezers are successfully applied as a flexible tool to produce plasmonic platforms for fluorescence enhancement of organic and biological molecules. The obtained 1D and 2D Ag‐nanoparticle patterns show broad plasmonic bands along the visible range. Large enhancement of the fluorescence emission of a variety of molecules such as DR1, DNA, proteins, and PDI‐O at various wavelengths is demonstrated.
ISSN:2365-709X
2365-709X
DOI:10.1002/admt.201700024