한원범 교수

Transient electronics refers to an emerging class of advanced technology, defined by an ability to chemically or physically dissolve, disintegrate, and degrade in actively or passively controlled fashions to leave environmentally and physiologically harmless by-products in environments, particularly in bio-fluids or aqueous solutions. The unusual properties that are opposite to operational modes in conventional electronics for a nearly infinite time frame offer unprecedented opportunities in res

As rubber-like elastomers have led to scientific breakthroughs in soft, stretchable characteristics-based wearable, implantable electronic devices or relevant research fields, developments of degradable elastomers with comparable mechanical properties could bring similar technological innovations in transient, bioresorbable electronics or expansion into unexplored areas. Here, we introduce ultra-stretchable, biodegradable elastomers capable of stretching up to ~1600% with outstanding properties

Recent advances in passive radiative cooling systems describe a variety of strategies to enhance cooling efficiency, while the integration of such technology with a bioinspired design using biodegradable materials can offer a research opportunity to generate energy in a sustainable manner, favorable for the temperature/climate system of the planet. Here, we introduce stretchable and ecoresorbable radiative cooling/heating systems engineered with zebra stripe-like patterns that enable the generat

Abstract Biocompatible and biodegradable polymer composite systems equipped with electrical/mechanical functions have been researched as a tool that can be applicable for bio‐integrated electronics to obtain a variety of useful information, through formation of reliable interfaces with soft, non‐planar skin and organs in the human body. Although previous review articles have explored various types of organic materials (natural/synthetic polymers), including intrinsically conducting polymers (ICP

Recent advances in the engineering or strategy of materials and device design have established ultrathin, soft, lightweight, and skin-conformable characteristics in wearable/implantable electronic systems, allowing precise, long-term monitoring of biological signals from skin/internal organs while reducing signal artifacts upon daily body motions or other external effects. Such a soft, flexible platform offers an opportunity capable of recording and analyzing diverse physical, chemical, and elec

As the regenerative mechanisms of biological organisms, self-healing provides useful functions for soft electronics or associated systems. However, there have been few examples of soft electronics where all components have self-healing properties while also ensuring compatibility between components to achieve multifunctional and resilient bio-integrated electronics. Here, we introduce a stretchable, biodegradable, self-healing conductor constructed by combination of two layers: (i) synthetic sel

Although biodegradable, transient electronic devices must dissolve or decompose via environmental factors, an effective waterproofing or encapsulation system is essential for reliable, durable operation for a desired period of time. Existing protection approaches use multiple or alternate layers of electrically inactive organic/inorganic elements combined with polymers; however, their high mechanical stiffness is not suitable for soft, time-dynamic biological tissues/skins/organs. Here, we intro

Abstract As the demand for power systems, including portable ones, is growing at an ever‐faster pace, many studies are approaching to discover innovative materials for current battery technology or replace the existing ones with new systems through mimicking living things or nature. Here, a soft, solid‐state power storage system featuring electric eel‐inspired artificial electric organs capable of converting the chemical potential of an ionic gradient into electricity is introduced. These organs

Abstract Transient electronics, designed to dissolve, disintegrate, or degrade in a controlled manner after fulfilling their functions without remaining biologically and environmentally harmful byproducts, have emerged as a transformative paradigm with promising applications in temporary biomedical devices, eco-friendly electronics, and security applications. The success of this device development relies significantly on an effective encapsulation to protect their degradable active materials fro

Abstract Artificial lipid membranes are versatile platforms that are used extensively in biological assays and sensing applications. Particularly, a 2D bilayer lipid membrane (BLM) has been focused on over the last several decades as it can be formed easily on solid supports by various methods. However, 3D lipid structures with structural advantages, such as large surface area that can accommodate a number of proteins and steric conformation that can react with target molecules efficiently, for

In article number 2002211, Suk-Won Hwang and co-workers review the recent developments in materials and manufacturing processes for transient electronics, an advanced class of electronics that entirely dissolves in a controlled manner, leaving environmentally and physiologically harmless by-products.