Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education, Guangxi Normal University, Guilin, 541004, China.
Nanoscale. 2011 Aug;3(8):3178-84. doi: 10.1039/c1nr10275c. Epub 2011 Jun 16.
AuPd nanoalloy and nanopalladium with a diameter of 5 nm were prepared, using sodium citrate as the stabilizing agent and NaBH(4) as the reductant. The nanocatalyst containing palladium on the surface exhibited a strong catalytic effect on the slow NiP particle reaction between NiCl(2) and NaH(2)PO(2), and the NiP particle system showed a resonance scattering (RS) peak at 508 nm. The RS results showed that the Pd atom on AuPd nanoalloy surface is the catalytic center. Combining the aptamer cracking reaction of double-stranded DNA (dsDNA)-UO(2)(2+), AuPd nanoalloy aggregation, and AuPd nanoalloy catalysis, both AuPd nanoalloy RS probe and AuPd nanoalloy catalytic RS assays were developed for the determination of 40-250 pmol L(-1) UO(2)(2+) and 5.0-50 pmol L(-1) UO(2)(2+), respectively.
制备了直径为 5nm 的 AuPd 纳米合金和纳米钯，使用柠檬酸钠作为稳定剂，硼氢化钠（NaBH(4)）作为还原剂。表面含有钯的纳米催化剂对 NiCl(2) 和 NaH(2)PO(2)之间缓慢的 NiP 颗粒反应表现出很强的催化作用，NiP 颗粒体系在 508nm 处表现出共振散射（RS）峰。RS 结果表明，AuPd 纳米合金表面的钯原子是催化中心。结合双链 DNA（dsDNA）-UO(2)(2+)的适体断裂反应、AuPd 纳米合金聚集以及 AuPd 纳米合金催化，开发了用于测定 40-250pmolL(-1)UO(2)(2+)和 5.0-50pmolL(-1)UO(2)(2+)的 AuPd 纳米合金 RS 探针和 AuPd 纳米合金催化 RS 测定法。
