期刊
BIOSENSORS & BIOELECTRONICS
卷 99, 期 -, 页码 458-463出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2017.08.010
关键词
Label-free immunosensor; Xanthine; Core-shell nanocrystals; Prostate specific antigen
类别
资金
- National Natural Science Foundation of China [21475118, 21275130, 21305124, 21505121]
Herein, bimetallic dendritic core-shell AuPd@Au nanocrystals (AuPd@Au NCs) were prepared by a simple one pot aqueous method using xanthine as a green growth-directing agent. By virtue of the enhanced peak currents in the H2O2 reduction catalyzed by AuPd@Au NCs, a label-free immunosensor was constructed for the detection of prostate specific antigen (PSA). The immunosensor exhibited significantly improved analytical performance for the assay of PSA with wide linear range of 0.1-50 ng mL(-1) and low detection limit of 0.078 ng mL(-1) (S/N = 3), coupled with the improved stability, reproducibility and selectivity. It provides a promising platform for clinical research and diagnosis.
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