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Thermochromic phase transition on CuMo0.9W0.1O4@SiO2 core-shell particles
1Institut de Chimie de la Matiere Condensee de Bordeaux, UPR 9048 CNRS 87 Avenue du Dr. Schweitzer, 33608 Pessac Cedex, France. gaudon@icmcb-bordeaux.cnrs.fr
Depositing silica (SiO2) shells onto copper molybdate tungstate (CuMo(1-x)W(x)O4) oxides delays their thermochromic phase transition. Shell thickness influences this transition temperature, and the phenomenon
Area of Science:
- Materials Science
- Solid State Chemistry
- Nanotechnology
Background:
- Thermochromic materials exhibit temperature-dependent color changes.
- CuMo(1-x)W(x)O4 is a promising oxide for thermochromic applications.
- Controlling phase transition temperatures is crucial for device performance.
Purpose of the Study:
- To investigate the effect of silica (SiO2) shell deposition on the thermochromic phase transition of CuMo(1-x)W(x)O4.
- To determine the influence of SiO2 shell thickness on the transition temperature.
- To evaluate the cyclability of the thermochromic phenomenon in coated materials.
Main Methods:
- Synthesis of SiO2-coated CuMo(1-x)W(x)O4 nanoparticles.
- Optical reflectivity measurements as a function of temperature.
- Analysis of phase transition temperature shifts.
Main Results:
- SiO2 shell deposition effectively delays the thermochromic phase transition of CuMo(1-x)W(x)O4.
- The transition temperature is tunable by controlling the SiO2 shell thickness.
- The thermochromic effect demonstrates good cyclability after coating.
Conclusions:
- SiO2 coating is a viable strategy to modify and control the thermochromic properties of CuMo(1-x)W(x)O4.
- The findings enable tailored thermochromic materials for specific temperature ranges.
- This work contributes to the development of advanced functional coatings.
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