title: DNA functionalized gold nanorods/nanoplates assembly as sensitive LSPR-based sensor for label-free detection of mercury ions.
abstract: Core-satellite assembly, i.e., gold nanoplates (AuNPs) surrounded by gold nanorods (AuNRs), has been obtained by Thymine-Hg(2+)-Thymine (T-Hg(2+)-T) coordination. A novel label-free localized surface plasmon resonance (LSPR) detection of mercury ions can be performed via the core-satellite assembly. The proposed detection protocol exhibits good linear correlation between wavelength shifts of the plasmon band and concentrations of mercury ions over the range from 10nM to 0.2μM. Moreover, the detection limit (3σ) for the probes is 2.2nM, which is better than colorimetric detection via random aggregation of gold nanoparticles.
authors.affiliation: Research Center for Biomimetic Functional Materials and Sensing Devices, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: Dandan
authors.initials: D
authors.lastname: Li
authors.forename: Guangchao
authors.initials: G
authors.lastname: Zheng
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Ding
authors.forename: Jin
authors.initials: J
authors.lastname: Wang
authors.forename: Jinhuai
authors.initials: J
authors.lastname: Liu
authors.forename: Lingtao
authors.initials: L
authors.lastname: Kong
mesh_terms: D004247:DNA / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D007477:Ions / Q000032:analysis; D008628:Mercury / Q000032:analysis*; D053768:Metal Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D020349:Surface Plasmon Resonance / Q000379:methods*; D013499:Surface Properties; D013941:Thymine / Q000737:chemistry
chemical_list: D007477:Ions; D006046:Gold; D004247:DNA; D008628:Mercury; D013941:Thymine