Dual-modal light scattering and fluorometric detection of lead ion by stimuli-responsive aggregation of BSA-stabilized copper nanoclusters

RSC Advances ◽  
2016 ◽  
Vol 6 (99) ◽  
pp. 96729-96734 ◽  
Author(s):  
Da-Qian Feng ◽  
Wenjie Zhu ◽  
Guoliang Liu ◽  
Wei Wang
Keyword(s):  
Light Scattering ◽  
Bovine Serum Albumin ◽  
Bovine Serum ◽  
High Sensitivity ◽  
Lead Ion ◽  
Fluorometric Detection ◽  
Stimuli Responsive ◽  
Dual Mode ◽  
Copper Nanoclusters ◽  
Sensitivity And Selectivity

A new and facilely prepared light scattering (LS) and fluorometric dual-mode sensor is developed for lead ion (Pb2+) detection with high sensitivity and selectivity by use of bovine serum albumin stabilized copper nanoclusters (BSA–Cu NCs).

scholarly journals A simple and sensitive sensor for silver ions based on unmodified gold nanoparticles by using dynamic light scattering techniques

2017 ◽  
Vol 95 (12) ◽  
pp. 1267-1272 ◽  
Author(s):  
Zhiyou Xiao ◽  
Anjiang Tang ◽  
Hongsheng Huang ◽  
Ze Wang
Keyword(s):  
Gold Nanoparticles ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
High Sensitivity ◽  
Silver Ions ◽  
Hydrodynamic Diameter ◽  
Optimum Conditions ◽  
Sensitivity And Selectivity ◽  
Sensitive Sensor ◽  
Average Hydrodynamic Diameter

A simple and sensitive assay for Ag+ was developed with unmodified gold nanoparticles (AuNPs) by using dynamic light scattering techniques. Ag+ could induce the oligonucleotide (5′-ATC ACT ATA TCA TAT ACT CAT-3′) to change from a single-stranded structure to a double-stranded structure and desorb from the surface of AuNPs, which triggered the aggregation of AuNPs in the salt solution. The average hydrodynamic diameter of aggregated AuNPs could be detected by using dynamic light scattering techniques. Under the optimum conditions, the average hydrodynamic diameter of AuNPs is proportional to the concentration of Ag+ within the range of 13.3–100.0 nmol/L, with a detection limit of 3.2 nmol/L. The method is easy to operate and has low sample consumption, high sensitivity and selectivity.

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