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From Lateral Flow Devices to a Novel Nano-Color Microfluidic Assay
AbstractImproving the performance of traditional diagnostic lateral flow assays combined with new manufacturing technologies is a primary goal in the research and development plans of diagnostic companies. Taking into consideration the components of lateral flow diagnostic test kits; innovation can include modification of labels, materials and device design. In recent years, Resonance-Enhanced Absorption (REA) of metal nano-particles has shown excellent applicability in bio-sensing for the detection of a variety of bio-molecular binding interactions. In a novel approach, we have now integrated REA-assays in a diagnostic microfluidic setup thus resolving the bottleneck of long incubation times inherent in previously existing REA-assays and simultaneously integrated automated fabrication techniques for diagnostics manufacture. Due to the roller-coating based technology and chemical resistance, we used PET-co-polyester as a substrate and a CO2 laser ablation system as a fast, highly precise and contactless alternative to classical micro-milling. It was possible to detect biological binding within three minutes – visible to the eye as colored text readout within the REA-fluidic device. A two-minute in-situ silver enhancement was able to enhance the resonant color additionally, if required.
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Assadollahi, S.; Reininger, C.; Palkovits, R.; Pointl, P.; Schalkhammer, T. From Lateral Flow Devices to a Novel Nano-Color Microfluidic Assay. Sensors 2009, 9, 6084-6100.View more citation formats
Assadollahi S, Reininger C, Palkovits R, Pointl P, Schalkhammer T. From Lateral Flow Devices to a Novel Nano-Color Microfluidic Assay. Sensors. 2009; 9(8):6084-6100.Chicago/Turabian Style
Assadollahi, Saied; Reininger, Christiane; Palkovits, Roland; Pointl, Peter; Schalkhammer, Thomas. 2009. "From Lateral Flow Devices to a Novel Nano-Color Microfluidic Assay." Sensors 9, no. 8: 6084-6100.