Spatially Programmed Multidimensional and Internal Patterning of...

Area of Science:

• Materials Science
• Polymer Science
• Nanotechnology

Background:

• Poly(3,4-ethylenedioxythiophene):polystyrenesulfonate) (PEDOT:PSS) is a conductive polymer with applications in electronics.
• Patterning conductive polymers on diverse substrates remains a challenge.
• Developing advanced materials for stimuli-responsive actuators is an active research area.

Purpose of the Study:

• To develop a novel method for in situ patterning of PEDOT:PSS.
• To create advanced actuators with enhanced photothermal and color-changing properties.
• To demonstrate the versatility of the method on various substrates and in confined spaces.

Main Methods:

• Liquid metal (LM)-induced gelation for dynamic templating of PEDOT:PSS.
• Interfacial reactions for controllable film thickness on 0D, 2D, and 3D substrates.
• Integration of PEDOT:PSS and LM for enhanced photothermal conversion and structural coloration.

Main Results:

• Achieved multidimensional and internal patterning of PEDOT:PSS on nonplanar and confined substrates.
• Demonstrated enhanced photothermal conversion and tunable structural coloration via film thickness control.
• Fabricated multilayered actuators exhibiting programmable morphing, inchworm locomotion (up to ~24 cm/s), and color changes under multiple stimuli (moisture, heat, magnetic fields).

Conclusions:

• The LM-induced gelation method offers a versatile platform for advanced PEDOT:PSS patterning.
• The developed actuators show significant potential for applications requiring stimuli-responsive movement and visual feedback.
• Combining morphing and color-changing capabilities provides synergistic functionalities for smart materials.