Journal
ANALYTICAL CHEMISTRY
Volume 83, Issue 24, Pages 9197-9200Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ac201814n
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Because current homogeneous immunoassays show some limitations, particularly low sensitivity, we developed a new immunoassay to overcome these limitations. The approach was based on magnetic nanoparticles with a thermoresponsive polymer layer, a negatively charged polymer, and streptavidin-biotin-based antibody-antigen detection and yielded higher sensitivity than commonly used heterogeneous immunoassays. Because no special equipment is needed, it can be applied to currently available absorbance-based systems for high-throughput assays.
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