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Type: 
Journal
Description: 
A surface acoustic wave (SAW)-enhanced, surface plasmon resonance (SPR) microfluidic biosensor in which SAW-induced mixing and phase-interrogation grating-coupling SPR are combined in a single lithium niobate lab-on-a-chip is demonstrated. Thiol-polyethylene glycol adsorption and avidin/biotin binding kinetics were monitored by exploiting the high sensitivity of grating-coupling SPR under azimuthal control. A time saturation binding kinetics reduction of 82% and 24% for polyethylene and avidin adsorption was obtained, respectively, due to the fluid mixing enhancement by means of the SAW-generated chaotic advection. These results represent the first implementation of a nanostructured SAW–SPR microfluidic biochip capable of significantly improving the molecule binding kinetics on a single, portable device. In addition, the biochip here proposed is suitable for a great variety of biosensing applications.
Publisher: 
Royal Society of Chemistry
Publication date: 
1 Jan 2016
Authors: 

Agnese Sonato, M Agostini, Gianluca Ruffato, Enrico Gazzola, Domenica Liuni, G Greco, M Travagliati, M Cecchini, Filippo Romanato

Biblio References: 
Volume: 16 Issue: 7 Pages: 1224-1233
Origin: 
Lab on a Chip