Copper Halide Hybrids Driven by Irreversible Structural Transitions for Anti-Counterfeiting and Traceability

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Engineering

Background:

• High-security anticounterfeiting and traceable information encryption are critical.
• Conventional fluorescent materials have limitations like complex synthesis and reversible responses.

Purpose of the Study:

• To develop novel copper(I) iodide hybrid materials for irreversible structural transitions.
• To create a dual-mode anticounterfeiting platform leveraging these transitions.

Main Methods:

• Synthesis of two copper(I) iodide hybrid materials (1D-Cu and 2D-Cu).
• Investigation of ethanol-triggered irreversible structural transformation.
• Photoluminescence and thermal stability analysis.
• Structural and spectroscopic characterization (Cu-Cu interactions, interfacial interactions).

Main Results:

• An irreversible structural transformation from 1D-Cu to 2D-Cu triggered by ethanol was achieved.
• This transition caused a significant photoluminescence redshift (green to orange-red) and increased photoluminescence quantum yield (PLQY).
• Enhanced thermal stability and optical performance of 2D-Cu were attributed to strong Cu-Cu and organic-inorganic interactions.

Conclusions:

• Irreversible structural transitions in copper halide materials show promise for high-security applications.
• The developed dual-mode anticounterfeiting platform utilizes permanent fluorescence changes for irreversible access records.
• This research offers a new pathway for advanced anticounterfeiting and traceability solutions.