Lattice matching enables construction of CaS@NaYF4 heterostructure with synergistically enhanced water resistance and luminescence for antibiotic detection.
Mikrochim Acta
; 191(8): 485, 2024 07 26.
Article
in En
| MEDLINE
| ID: mdl-39060720
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 NaYF4 phase on the CaS luminescent core. Due to their similarity in crystal structure, a uniform core-shell heterostructure (CaSCe3+@NaYF4) can be obtained, which effectively protects the CaSCe3+ 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 CaSCe3+@NaYF4 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.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Yttrium
/
Kanamycin
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Milk
/
Metal Nanoparticles
/
Limit of Detection
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Fluorides
/
Gold
/
Anti-Bacterial Agents
Limits:
Animals
Language:
En
Journal:
Mikrochim Acta
Year:
2024
Document type:
Article
Affiliation country:
Country of publication: