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 β‐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 μg 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. A facile synthetic strategy was devised to construct raspberry like gold nanoparticles (RbNPs). 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 μg mL−1), extremely low detection limit (40.91 fg mL−1 i. e. 0.79 pM)