title: Catalysis of aptamer-modified AuPd nanoalloy probe and its application to resonance scattering detection of trace UO(2)2+.
abstract: 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.
authors.affiliation: Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education, Guangxi Normal University, Guilin, 541004, China. ahliang2008@163.com
authors.forename: Aihui
authors.initials: A
authors.lastname: Liang
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yanyan
authors.initials: Y
authors.lastname: Fan
authors.forename: Chunqiang
authors.initials: C
authors.lastname: Chen
authors.forename: Guiqing
authors.initials: G
authors.lastname: Wen
authors.forename: Qingye
authors.initials: Q
authors.lastname: Liu
authors.forename: Caiyan
authors.initials: C
authors.lastname: Kang
authors.forename: Zhiliang
authors.initials: Z
authors.lastname: Jiang