Blue/red ratiometric pH sensors without background signals based on 808 nm-excited core–triple shell up-conversion nanoparticles
Tao Wang, Fenglei Sun, Zike Jiang, Jing Wang, Yanyan Ma, Haitao Lin, Hongmin Lv, Shanshan Xu, Jinhua Li, Guangjun Zhou
Abstract
A pH sensor based on CTS UCNPs exhibits ratiometric responses from pH 4 to 7 according to blue/red luminescence intensity ratios under 808 nm excitation.
Topics & Concepts
Materials scienceLuminescenceExcited stateExcitationNanoparticleCore (optical fiber)OptoelectronicsRed lightBlue lightBlueshiftPhotochemistryAnalytical Chemistry (journal)NanotechnologyPhotoluminescenceAtomic physicsChemistryChromatographyComposite materialEngineeringBiologyPhysicsBotanyElectrical engineeringLuminescence and Fluorescent MaterialsAnalytical Chemistry and SensorsMolecular Sensors and Ion Detection