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A novel, rapid DNA detection method based on fluorescence quenching of quantum dots (QDs) by gold nanoparticles (GNPs) through polymerase chain reaction (PCR) was developed. In proof-of-concept experiments, the length of the amplicon DNA ranging from 152 to 1003 base pairs (bp) could be determined based on quenched fluorescence intensity with 136bp as the lower limit of effective range. And the real...
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