Cephalopod-Inspired Chromotropic Ionic Skin with Rapid Visual Sensing Capabilities to Multiple Stimuli

Area of Science:

• Biomimetic materials science
• Soft robotics
• Iontronics

Background:

• Biological skin systems perceive stimuli via ion transduction, with some organisms changing color using photonic nanostructures.
• Current soft iontronics inspired by skin lack rapid, full-color switching for multiple stimuli (tension, pressure, temperature).

Purpose of the Study:

• To develop an intelligent chromotropic iontronics system with rapid full-color switching capabilities.
• To create a biomimetic skin that responds to various stimuli including mechanical strain, tactile sensation, and thermal changes.

Main Methods:

• Constructed a biomimetic ultrastructure with anisotropic electrostatic repulsion.
• Integrated ionic mechanotransduction for stimulus response.
• Engineered anisotropic photonic nanostructures for optical visualization.

Main Results:

• The developed skin-like iontronics exhibit synchronous electrical response and optical visualization to mechanical strain and tactile sensation.
• The system demonstrates instantaneous geometric changes in response to thermal stimuli via anisotropic electrostatic repulsion.
• Real-time transduction of temperature or infrared light into ionic signals and color changes was achieved.

Conclusions:

• The novel design of anisotropic photonic nanostructures advances soft iontronics.
• This multifunctional, interactive sensing platform dynamically displays stimuli information.
• The developed chromotropic iontronics offer a concise and versatile sensing solution.