Journal
ANALYTICAL CHEMISTRY
Volume 72, Issue 24, Pages 6025-6029Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ac000567y
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A new scheme for the detection of molecular interactions based on optical readout of nanoparticle labels has been developed. Capture DNA probes were arrayed on a glass chip and incubated with nanoparticle-labeled target DNA probes, containing a complementary sequence. Binding events were monitored by optical means, using reflected and transmitted light for the detection of surface-bound nanoparticles. Control experiments exclude significant influence of nonspecific binding on the observed contrast. Scanning force microscopy revealed the distribution of nanoparticles on the chip surface.
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