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Issue 5, 2011
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DielectrophoresisRaman spectroscopy system for analysing suspended nanoparticles

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Abstract

A microfluidic dielectrophoresis platform consisting of curved microelectrodes was developed and integrated with a Raman spectroscopy system. The electrodes were patterned on a quartz substrate, which has insignificant Raman response, and integrated with a microfluidic channel that was imprinted in poly-dimethylsiloxane (PDMS). We will show that this novel integrated system can be efficiently used for the determination of suspended particle types and the direct mapping of their spatial concentrations. We will also illustrate the system's unique advantages over conventional optical systems. Nanoparticles of tungsten trioxide (WO3) and polystyrene were used in the investigations, as they are Raman active and can be homogeneously suspended in water.

Graphical abstract: Dielectrophoresis–Raman spectroscopy system for analysing suspended nanoparticles

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Publication details

The article was received on 05 Oct 2010, accepted on 20 Dec 2010 and first published on 26 Jan 2011


Article type: Paper
DOI: 10.1039/C0LC00481B
Citation: Lab Chip, 2011,11, 921-928
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    DielectrophoresisRaman spectroscopy system for analysing suspended nanoparticles

    A. F. Chrimes, A. A. Kayani, K. Khoshmanesh, P. R. Stoddart, P. Mulvaney, A. Mitchell and K. Kalantar-zadeh, Lab Chip, 2011, 11, 921
    DOI: 10.1039/C0LC00481B

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