Trapping of Au nanoparticles in a microfluidic device using dielectrophoresis for surface enhanced Raman spectroscopy

Dielectrophoresis (DEP) is the electrokinetic movement of non-charged particles when they are subjected to a non-uniform electric field. This is a growing area of research, which can be used for trapping, concentrating and separating different particles. Some work has been reported with the intentio...

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Bibliographic Details
Published in:Analyst (London) 2017-01, Vol.142 (2), p.375-379
Main Authors: Almeida, Gabriela B, Poppi, Ronei J, da Silva, José A Fracassi
Format: Article
Language:English
Subjects:
Crystals
Dielectrophoresis
Electric fields
Electrokinetics
Gold
Nanoparticles
Raman spectroscopy
Trapping
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Summary:Dielectrophoresis (DEP) is the electrokinetic movement of non-charged particles when they are subjected to a non-uniform electric field. This is a growing area of research, which can be used for trapping, concentrating and separating different particles. Some work has been reported with the intention of trapping metal particles to optimize the surface enhanced Raman spectroscopy (SERS) effect. In this paper, we use DEP with insulating structures (iDEP) to generate a non-uniform electric field for trapping gold nanoparticles (AuNP). The system was coupled to a Raman spectrometer for the detection of Crystal Violet by utilizing the SERS effect.
ISSN:0003-2654
1364-5528
DOI:10.1039/c6an01497f