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A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles

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Published on: November 14, 2015

Nano-3D-Printed Photochromic Micro-Objects.

Sebastian Ulrich^1,2, Xiaopu Wang^3,4, Markus Rottmar⁵

¹Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles, Lerchenfeldstrasse 5, St. Gallen, 9014, Switzerland.

Small (Weinheim an Der Bergstrasse, Germany)

|May 24, 2021

Summary

This summary is machine-generated.

Scientists developed a novel photoresist for 3D printing photochromic micro-objects using direct laser writing. This breakthrough enables the creation of complex, color-changing 3D structures with tunable properties and responsiveness.

Keywords:

3D-printing donor-acceptor Stenhouse adducts photochromism thiol-ene reaction two-photon polymerization

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Area of Science:

Materials Science
Polymer Chemistry
Optics

Background:

Molecular photoswitches offer reversible color change for photoresponsive applications.
Conventional fabrication methods limit the complexity of photochromic devices.

Purpose of the Study:

To introduce the first photoresist for direct laser writing of photochromic 3D micro-objects.
To enable fabrication of complex 3D microstructures with tunable photochromic properties.

Main Methods:

Utilizing two-photon polymerization with thiol-ene photo-clickable resins.
Integrating donor-acceptor Stenhouse adduct (DASA) photoswitches for color change.
Employing direct laser writing for microfabrication.

Main Results:

Successfully fabricated complex 3D microstructures with photochromic properties.
Demonstrated reversible color change upon visible light exposure via photoisomerization.
Showcased fluorescence variations of DASAs for monitoring photoswitching and recovery.

Conclusions:

Developed a versatile platform for 3D microfabrication of photochromic objects.
Enabled molecular engineering of color and responsiveness in 3D microstructures.
Opened new avenues for advanced photoresponsive materials and devices.