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White Light-Emitting Multistimuli-Responsive Hydrogels with Lanthanides and Carbon Dots
Qingdi Zhu1, Lihong Zhang2, Krystyn Van Vliet1
1BioSystems and Micromechanics Interdisciplinary Research Group , Singapore-MIT Alliance for Research and Technology (SMART) Centre, CREATE , 138602 , Singapore.
This study presents a novel white-luminescent hydrogel for sensing applications. The stretchable material responds to various stimuli like pH and temperature, offering versatile chemical and environmental monitoring capabilities.
Area of Science:
- Materials Science
- Polymer Chemistry
- Chemical Sensing
Background:
- Polymers with tunable optical properties are valuable for sensing applications.
- Stimuli-responsive materials are particularly useful in aqueous or humid environments.
Purpose of the Study:
- To develop a versatile, white-luminescent, and stretchable hydrogel for multi-stimuli sensing.
- To explore the use of lanthanide ions and carbon dots (CD) for tunable luminescence in hydrogels.
Main Methods:
- Fabrication of luminescent hydrogels via an aqueous process.
- Incorporation of lanthanide ions and carbon dots (CD) into a polyacrylamide and poly(acrylic acid) network.
- Tuning white luminescence by balancing blue-emitting CDs with green- and red-emitting lanthanide ions.
Main Results:
- Achieved white luminescence by combining different light-emitting components.
- Demonstrated chromic responsiveness to multiple stimuli: pH, organic vapors, transition-metal ions, and temperature.
- The hydrogel exhibited stretchability with a fracture strain of 400%.
Conclusions:
- The developed photoluminescent hydrogel is a multifunctional material for chemical and environmental sensing.
- The material's responsiveness to diverse stimuli and its mechanical properties make it promising for advanced sensor development.
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