High-performance nanothermometry system with controlled sensitivity based on dual-emission CsPbBr₃/CdTe@SiO₂...

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Engineering

Background:

• Dual-emission quantum dots (QDs) are promising for temperature sensing due to self-calibration and high sensitivity.
• Modulating QD assembly and properties is crucial for advanced sensing applications.

Purpose of the Study:

• To create a dual-emission fluorescent temperature sensing system using dendritic mesoporous SiO2 core-shell spheres encapsulating dual QDs.
• To develop a temperature probe with tunable sensitivity for enhanced performance.

Main Methods:

• Encapsulation of CsPbBr3 and CdTe QDs within SiO2 core-shell spheres.
• Utilizing peak wavelength spacing variation and fluorescence intensity ratio for thermometry.
• Applying a novel 'sliding resistor' concept to tune probe sensitivity.

Main Results:

• A dual-emission temperature probe with high thermal stability and sensitivity was successfully developed.
• Tunable sensitivity was achieved by adjusting fluorescence intensity and peak wavelength.
• Demonstrated potential applications in temperature measurement, LEDs, and anti-counterfeiting.

Conclusions:

• The proposed strategy enables the rational design of high-performance dual-emission fluorescence temperature sensing systems.
• Customizable sensitivity is a key feature for advanced temperature measurement applications.
• This work advances the development of sophisticated QD-based sensing technologies.