A ratiometric luminescence pH sensor based on YAG:V³⁺,V⁵⁺ nanoparticles

Abstract

A new type of ratiometric luminescence-based pH sensor is described. The spatial segregation of vanadium ions of different oxidation states within the Y3Al5O12 (YAG) nanoparticles induces a difference in the...

Influence of the Synthesis Conditions on the Morphology and Thermometric Properties of the Lifetime-Based Luminescent Thermometers in YPO4:Yb3+,Nd3+ Nanocrystals

“…Materials that exhibit emission of electromagnetic radiation under nonthermal stimuli called phosphors are commonly used primarily in the lighting industry. − However, in recent years, they have been increasingly used in many, much more demanding applications. One of the most interesting is the exploitation of luminescence for remote sensing of physical or chemical quantities of the medium in which they are located, including luminescence thermometers, manometers, pH meters, etc. − Among these techniques, luminescence thermometry is undoubtedly the most strongly developed. − It enables remote readout of temperature by analyzing spectroscopic properties of phosphor. Although the ratiometric approach is the most popular noncontact temperature sensing technique described in the literature, the reliability and accuracy of the temperature readout are significantly limited by the fact that the ratio of the intensity of the two bands can be modified by the medium in which the phosphor is located. , …”

A Tb3+ functionalized triazine-porous organic framework as a ratiometric fluorescent sensor for determination of ciprofloxacin in aquatic products

“…11,12 As a typical fluorescence method, in the ratiometric fluorescence method the change in the ratio of two fluorescence peaks in the fluorescence spectrum is considered as the response signal, which can reduce or eliminate the interference of the substrate, light drift and solvent, thus improving the accuracy of the analysis method. [13][14][15] Consequently, it is important to establish a ratiometric fluorescence method for the determination of ciprofloxacin.…”