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Updated: May 11, 2026
An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium
Published on: December 17, 2018
DNA functionalized gold nanorods/nanoplates assembly as sensitive LSPR-based sensor for label-free detection of
Dandan Li1, Guangchao Zheng, Xiaofeng Ding
1Research Center for Biomimetic Functional Materials and Sensing Devices, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
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.
