A highly sensitive ratiometric near-infrared nanosensor based on erbium-hyperdoped silicon quantum dots for iron(Ⅲ)detectionOACSTPCDEI
A highly sensitive ratiometric near-infrared nanosensor based on erbium-hyperdoped silicon quantum dots for iron(Ⅲ)detection
Ratiometric fluorescent detection of iron(Ⅲ)(Fe3+)offers inherent self-calibration and contactless analytic capabili-ties.However,realizing a dual-emission near-infrared(NIR)nanosensor with a low limit of detection(LOD)is rather challenging.In this work,we report the synthesis of water-dispersible erbium-hyperdoped silicon quantum dots(Si QDs:Er),which emit NIR light at the wavelengths of 810 and 1540 nm.A dual-emission NIR nanosensor based on water-dispersible Si QDs:Er enables ratiometric Fe3+detection with a very low LOD(0.06 μM).The effects of pH,recyclability,and the interplay between static and dynamic quenching mechanisms for Fe3+detection have been systematically studied.In addition,we demonstrate that the nanosensor may be used to construct a sequential logic circuit with memory functions.
Kun Wang;Wenxuan Lai;Zhenyi Ni;Deren Yang;Xiaodong Pi
State Key Laboratory of Silicon and Advanced Semiconductor Materials&School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,ChinaState Key Laboratory of Silicon and Advanced Semiconductor Materials&School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China||Institute of Advanced Semiconductors&Zhejiang Provincial Key Laboratory of Power Semiconductor Materials and Devices,ZJU-Hangzhou Global Scientific and Technological Innovation Center,Zhejiang University,Hangzhou 311215,China
erbium-hyperdoped silicon quantum dotsdual-emission near-infrared nanosensorFe3+detectionsequential logic cir-cuit
《半导体学报（英文版）》 2024 (008)
55-65 / 11
This work is mainly supported by the National Natural Sci-ence Foundation of China(U22A2075,U20A20209),the Funda-mental Research Funds for the Central Universities(226-2022-00200),and the Qianjiang Distinguished Experts program of Hangzhou.The authors also acknowledge the Instrumenta-tion and Service Center for Molecular Sciences at Westlake Uni-versity for technical assistance.
评论