S2E12

Ionotronic Luminescence: Principle, Materials and Fabrication

Electrical Bioadhesive Interface for Robust Tissue-Electronics integration

Abstract:

Electroluminescence for many decades have been widely used for displays and solid-state lighting. Advances in stretchable and transparent electrodes bring enormous new opportunities for electroluminescence. Recently, ionic conductors have been employed to activate phosphors that can luminesce in response to alternating electric field, achieving ionotronic luminescence of exceptionally high stretchability. In this talk, I will firstly introduce the working principles of ionotronic luminescence by exemplifying one of the first-generation ionotronic luminescent devices. Then the physical and chemical properties of constituent materials, i.e. hydrogel and hydrophobic elastomer, will be discussed. Finally, a process of multistep dip coat will be delineated to meet the fundamental challenge that persists in integrating hydrogels and hydrophobic elastomers-in various manufacturing processes-with strong, stretchable, and transparent adhesion.

Abstract:

Reliable functions of bioelectronic devices require conformal, stable, and conductive interfaces with biological tissues. Integrating bioelectronic devices with tissues usually relies on physical attachment or surgical suturing, yet these methods face challenges such as non-conformal contact, unstable fixation, tissue damage, and/or scar formation. In this talk, I will present our new e-bioadhesive technology to achieve rapid, robust, and on-demand detachable integration of bioelectronic devices on diverse wet dynamic tissues. I will discuss the design of the e-bioadhesive interface in the aspects of mechanical and electrical properties, biocompatibility, applicability, and functionalities. I will conclude my talk by briefly discussing some perspectives for enhancing tissue-device integration and the remaining challenges and opportunities.