Lattice Matching Enables Construction of CaS@NaYF Heterostructure with Synergistically Enhanced Water Resistance and Luminescence for Antibiotic Detection

Overview

Journal Mikrochim Acta

Specialties Biotechnology
Chemistry

Date 2024 Jul 26

PMID 39060720

Authors

Yao Wang

Huadong Chen

Tonghan Zhao

Jing Wang

Yihan Wu

Jinliang Liu

Yong Zhang

Xiaohui Zhu

Affiliations

Soon will be listed here.

Abstract

Rare earth (RE)-doped CaS phosphors have been widely used as light-emitting components in various fields. Nevertheless, the application of nanosized CaS particles is still significantly limited by their poor water resistance and weak luminescence. Herein, a lattice-matching strategy is developed by growing an inert shell of cubic NaYF phase on the CaS luminescent core. Due to their similarity in crystal structure, a uniform core-shell heterostructure (CaS:Ce@NaYF) can be obtained, which effectively protects the CaS:Ce core from degradation in aqueous environment and enhances its luminescence intensity. As a proof of concept, a label-free aptasensor is further constructed by combining core-shell CaS:Ce@NaYF and Au nanoparticles (AuNPs) for the ultrasensitive detection of kanamycin antibiotics. Based on the efficient FRET process, the detection linear range of kanamycin spans from 100 to 1000 nM with a detection limit of 7.8 nM. Besides, the aptasensor shows excellent selectivity towards kanamycin antibiotics, and has been successfully applied to the detection of kanamycin spiked in tap water and milk samples, demonstrating its high potential for sensing applications.

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