Dual-Responsive SPMA-Modified Polymer Photonic Crystals and Their Dynamic Display Patterns

Area of Science:

• Materials Science
• Polymer Chemistry
• Nanotechnology

Background:

• Photonic crystals (PCs) offer unique optical properties.
• Controlling PC optical responses is crucial for advanced applications.
• Spiro-indoline derivatives exhibit light-responsive isomerization.

Purpose of the Study:

• To develop light and electrothermal responsive polymer photonic crystals.
• To achieve dynamic display patterns using SPMA-modified PCs and a graphite layer.
• To explore potential applications in information recording and anticounterfeiting.

Main Methods:

• Modification of polymer photonic crystals with 1'-acryloyl chloride-3',3'-dimethyl-6-nitro-spiro(2H-1-benzopyran-2,2'-indoline) (SPMA).
• Integration of SPMA-modified PCs with a patterned graphite layer for electrical control.
• Utilizing UV light irradiation and applied voltage to induce and control fluorescence changes.

Main Results:

• SPMA-modified PCs exhibit fluorescence under UV light due to SPMA isomerization.
• Applied voltage to the graphite layer selectively extinguishes PC fluorescence, creating dynamic patterns.
• Reversible fluorescence changes allow for pattern disappearance and reappearance.
• Demonstrated fabrication of alphanumeric and numeric patterns on glass and paper substrates.

Conclusions:

• Dual-responsive polymer photonic crystals offer a novel platform for dynamic displays.
• The developed technique shows promise for applications in information recording, anticounterfeiting, and photoelectric devices.
• Controlled manipulation of photonic crystal fluorescence via light and electrical stimuli is achievable.