Abstract
In this work, an ultrasensitive detection of cancer marker CEA has been developed by using novel gold nanoflowers as SERS tags and SERS-active magnetic nanoparticles as supporting substrates. A good linear relationship between concentration and SERS intensity is found in the range between 0.01 fg mL−1 and 1 ng mL−1, and the LOD is 0.01 fg mL−1.
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