Raspberry-Like Gold Nanoparticles Based On Nanoclusters Anchored on Cyclodextrin-Functionalized Nanoparticles: Synthesis and Ultrasensitive Electrochemical Detection of Chromium(VI) Ions

A facile synthetic strategy is devised to construct raspberry like gold nanoparticles (RbNPs) formed by gold nanoclusters wrapped around beta-cyclodextrin functionalized gold nanoparticles (CD-AuNPs@AuNCs). An efficient and sensitive electrochemical sensor for the detection of Cr(VI) has been developed based on RbNPs. The sensing platform exhibits an excellent wide linear range (100 pg mL(-1) to 10 mu g mL(-1)), extremely low detection limit (40.91 fg mL(-1) i. e. 0.79 pM), which may pave a new way to fabricate other ultrasensitive electrochemical sensors based on the designed RbNPs.

Automated summary

A facile synthetic strategy is used to construct raspberry-like gold nanoparticles, which are then used to develop an efficient and sensitive electrochemical sensor for the detection of Cr(VI). The sensor exhibits a wide linear range and an extremely low detection limit, suggesting potential applications in other ultrasensitive electrochemical sensors.