Low-Pressure-Threshold Triggered Irreversible Emission Transformation toward Flexible Pressure Imaging and
Ming Cong1, Jiayi Yang1, Xihan Yu1
1State Key Laboratory of High Pressure and Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China.
Angewandte Chemie (International Ed. in English)
|November 13, 2025
Summary
Researchers developed a novel pressure-sensing material using copper halide nanocrystals. This material exhibits irreversible emission changes under low pressure, enabling applications in flexible imaging and anti-counterfeiting technologies.
Area of Science:
- Materials Science
- Nanotechnology
- Solid-State Chemistry
Background:
- Pressure-induced phase transitions are crucial for developing metastable materials.
- High pressures typically require specialized equipment, limiting practical applications.
- Irreversible transformations are desirable for robust sensing and data storage.
Purpose of the Study:
- To achieve irreversible emission transformation in 0D copper halides (TPA)CuI2 nanocrystals (NCs) at low pressures.
- To explore the potential of these NCs as flexible pressure-imaging materials.
- To investigate their use in dynamic password and anti-counterfeiting applications.
Main Methods:
- High pressure engineering was applied to (TPA)CuI2 NCs.
- The structural and optical properties before and after pressure treatment were analyzed.
- The reversibility and response time of the emission changes were studied.
Main Results:
- An irreversible emission transformation from dull white to bright green was achieved at pressures as low as 0.6 GPa.
- The irreversibility is attributed to steric hindrance of organic cations and enhanced hydrogen bonding.
- The (TPA)CuI2 NCs-based film demonstrated flexible and water-resistant pressure imaging capabilities.
- Dynamic password generation was achieved through varying recovery times.
Conclusions:
- Low-pressure induced irreversible emission transformation is feasible in (TPA)CuI2 NCs.
- These materials offer a promising platform for accessible, high-performance pressure sensors.
- Potential applications include pipeline inspection, anti-counterfeiting, and secure data encoding.
Keywords:
High pressure engineeringIrreversible emission transformationLow pressure‐thresholdPressure imagingMore Related Videos
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