期刊
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
卷 379, 期 7-8, 页码 982-991出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00216-004-2693-z
关键词
biochip; surface acoustic waves; droplet; microarray; hybridization; PCR
Surface acoustic waves are used to actuate and process smallest amounts of fluids on the planar surface of a piezoelectric chip. Chemical modification of the chip surface is employed to create virtual wells and tubes to confine the liquids. Lithographically modulated wetting properties of the surface define a fluidic network, in analogy to the wiring of an electronic circuit. Acoustic radiation pressure exerted by the surface wave leads to internal streaming in the fluid and eventually to actuation of small droplets along predetermined trajectories. This way, in analogy to microelectronic circuitry, programmable biochips for a variety of assays on a chip have been realized.
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