Dielectrophoresis-Raman spectroscopy system for analysing suspended nanoparticles.
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 (WO(3)) and polystyrene were used in the investigations, as they are Raman active and can be homogeneously suspended in water.
School of Electrical and Computer Engineering, RMIT University, Victoria, Australia. adam.chrimes@rmit.edu.au
Adam F
AF
Chrimes
Aminuddin A
AA
Kayani
Khashayar
K
Khoshmanesh
Paul R
PR
Stoddart
Paul
P
Mulvaney
Arnan
A
Mitchell
Kourosh
K
Kalantar-Zadeh
D017097:Electric Impedance; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation*; D053758:Nanoparticles / Q000032:analysis* / Q000737:chemistry*; D010087:Oxides / Q000032:analysis / Q000737:chemistry; D011137:Polystyrenes / Q000032:analysis / Q000737:chemistry; D013059:Spectrum Analysis, Raman / Q000295:instrumentation*; D013535:Suspensions; D014414:Tungsten / Q000032:analysis / Q000737:chemistry
D010087:Oxides; D011137:Polystyrenes; D013535:Suspensions; C511604:tungsten oxide; D014414:Tungsten