1. E-fabric Multifunctional Wearable Sensors for Pressure Ulcer Prevention

Our research group focuses on developing a monitoring system for the early diagnosis of pressure ulcers utilizing wearable multimodal sensors.

We develop wearable devices capable of wireless data transmission and the continuous monitoring of changes in skin pressure, temperature, and impedance, which are closely associated with the development of pressure ulcers.

Through this research, we aim to elucidate the correlations between biomarkers and the disease, ultimately establishing an accurate, objective, and next-generation methodology for the early diagnosis of pressure ulcers.

2. Development of Wound Healing Patches Using Adhesive Electrodes

Our laboratory focuses on developing electroceutical systems designed to heal chronic wounds through electrical stimulation.

Chronic wounds often deviate from the natural healing process, remaining unhealed for prolonged periods. To overcome this, we utilize electrical stimulation to restore and enhance the natural healing mechanisms of cells. We specifically research and develop wearable electrodes with high adhesion and low electrical impedance to deliver efficient stimulation to the skin.

Through our wearable electroceuticals, stable electrical stimulation can be applied to the wound site over extended periods, effectively restoring impaired healing processes and facilitating the treatment of chronic wounds.

3. Development of Glaucoma Sensing and Treatment Systems via Optogenetics

Our laboratory focuses on developing next-generation healthcare systems for the management of chronic diseases, utilizing ultra-flexible OLED and wearable sensor technologies.

To effectively manage glaucoma, we research real-time intraocular pressure (IOP) monitoring technologies using wearable strain sensors, alongside customized phototherapy techniques based on optogenetic IOP regulation principles.

By developing contact lens-type devices, we implement a convenient and non-invasive system. To achieve this, we conduct research on the integration of multiple components—such as sensors, OLEDs, and antennas—as well as the development of wireless power transfer and integrated circuits.

1. Self-Powered Sensors & Stimulators for Closed-loop System

Our laboratory researches skin-inspired, multifunctional tactile sensors that simultaneously detect dynamic pressure, static pressure, and temperature within a single sensing unit and integrates them into advanced closed-loop stimulus-replicating systems.

We achieve this multi-sensory capability by integrating triboelectric and ionic mechanisms, allowing the sensor to generate distinct voltage profiles without cross-interference.

Furthermore we successfully implemented a closed-loop system that translates these real-world signals into live biomimetic sensations via wearable electro-thermal stimulators. By achieving high-fidelity haptic replication without complex arrays or external power, this framework provides a compact and energy-efficient solution for next-generation smart prosthetics, tele-haptics, and adaptive robotics.

2. Self-Powered Sensors

Our laboratory researches self-powered sensors that convert biosignals generated within the body and stimuli acting to the body into electrical signals without relying on external power sources.

By utilizing mechanisms such as piezoelectricity, triboelectricity, we convert various stimuli-including pressure, motion, sound-into electrical signals. Through this, we develop sensor platforms capable of monitoring the user's physical condition or assisting impaired bodily functions.

Because these self-powered sensors can actively detect changes in the body and the surrounding environment without a separate power supply, they contribute to the realization of wearable healthcare and bioelectronic systems that can be used for extended periods.

3. High Performance Mechanical Energy Harvester

Our laboratory conducts research on converting abundant energy sources from both the body and the surrounding environment into electricity to realize self-sustainable wearable systems.

We aim to harvest mechanical energy generated from activities such as walking and body movements, as well as vibrations and pressure from various surrounding facilities, and to use the harvested energy to power diverse wearable devices.

To extend the scope of wearable energy systems beyond mechanical energy harvesting, our laboratory is pursuing collaborations with researchers specializing in other energy sources, such as thermal and light energy. Through these interdisciplinary collaborations, we ultimately aim to realize wearable systems capable of long-term operation without frequent recharging.

1. Stretchable Organic Light-Emitting Diodes (OLEDs)

Our laboratory develops mechanically deformable organic light-emitting diodes (OLEDs) for next-generation wearable displays and biomedical devices.

Conventional OLEDs are vulnerable to dynamic mechanical deformation, such as repeated stretching, bending, and folding, which can lead to performance degradation and device failure. To overcome these limitations, we design intrinsically stretchable materials, device architectures, and fabrication processes that enable OLEDs to maintain stable operation under mechanical deformation.

In particular, we develop stretchable emissive layers, charge-transport layers, and electrodes based on polymers and nanomaterials, aiming to achieve both high optoelectronic performance and mechanical durability. Our group reported the first intrinsically stretchable OLEDs (is-OLEDs) in which all constituent layers are stretchable. Our is-OLEDs have achieved the highest level of mechanical stability under repeated stretching reported to date, positioning our group at the forefront of research in the field of is-OLEDs.

2. Flexible/Stretchable Battery

Our laboratory focuses on researching next-generation stretchable batteries capable of providing a stable power supply to wearable electronics, utilizing fabrication technologies for stretchable electrodes, polymer electrolytes, and hydrogels.

To ensure a reliable power supply even in wearable environments subject to repeated deformation from human movement, we fabricate batteries by designing stretchable electrodes and integrating polymer- and hydrogel-based electrolytes with enhanced ionic conductivity and interfacial adhesion. Through the development of skin-attachable battery devices, we aim to implement a highly flexible and wearable energy storage system. To this end, we conduct research on improving the stretchability and electrochemical stability of core components—such as electrodes, electrolytes, and current collectors—as well as developing integrated battery-sensor systems to power wearable devices.

Brain-to-Speech Neural Interfaces for Neurodegeneratvie and Development Disorders

Our laboratory is conducting international collaborative research to develop a non-invasive, closed-loop platform for the diagnosis and treatment of neurodegenerative diseases.

Conventional clinical approaches face several critical limitations, including the use of invasive procedures, the need for continuous intervention by medical professionals, and an incomplete understanding of disease mechanisms. These challenges remain major barriers to the development of early diagnostic and therapeutic strategies for neurological disorders. Because such complex problems cannot be fully addressed within a single research field, large-scale international and multidisciplinary collaboration is essential.

This research aims to actively utilize speech signals, which have been only limitedly explored in previous studies, and to integrate them with brain signals through AI-based analysis. By enabling early diagnosis and therapeutic stimulation at the device level, we seek to implement a non-invasive closed-loop system capable of managing neurological diseases. The proposed system will ultimately be evaluated through international collaborative clinical studies.

2. Wearable Brain Signal Monitoring and Deep Brain Stimulation Device

Our laboratory researches next-generation ultrasound-based neural interface devices capable of non-invasively monitoring brain signals and selectively stimulating neural activity.

To enable early diagnosis and precise stimulation for neurodegenerative diseases, we are developing stretchable ultrasound devices that can maintain stable conformal contact with the curved and dynamic surface of the human scalp while precisely transmitting and receiving ultrasound signals. In particular, we aim to integrate ultrasound-based brain-signal monitoring and non-invasive neuromodulation within a single device platform.

Through international collaborative research, we ultimately seek to link this ultrasound-based neural interface with EEG and speech-signal analysis technologies. By detecting abnormal signals associated with neurodegenerative diseases and actively adjusting ultrasound stimulation parameters according to the patient’s brain state, we aim to realize a brain–speech closed-loop system for non-invasive diagnosis and therapy.

42.

All-Solution-Processed Foldable Transparent Electrodes of Ag Nanowire Mesh and Metal Matrix Films for Flexible Electronics

41.

Silver Nanowire Network Transparent Electrodes with Highly Enhanced Flexibility by Welding for Application in Flexible Organic Light-Emitting Diodes

40.

Hybrid-Structured Indium Tin Oxide with Ag Nanoparticles as Crystalline Seeds for Transparent Electrode with Enhanced Flexibility and Its Application to Organic Light Emitting Diodes

39.

The effect of the size and volume fraction of Zr2Cu on the sintering behavior of tungsten matrix composites during liquid-reactive sintering

38.

Improving the Flexibility of Large-Area Transparent Conductive Oxide Electrodes on Polymer Substrates for Flexible Organic Light Emitting Diodes by Introducing Surface Roughness

37.

Investigation of the Interfacial adhesion of the Transparent Conductive Oxide Films to Large-Area Flexible Polymer Substrate Using Laser-Induced Thermo-Mechanical Stresses

36.

Highly Flexible, Hybrid-Structured Indium Tin Oxides for Transparent Electrodes on Polymer Substrates

35.

The mechanical property of the oxide scale on Fe–Cr alloy steels

34.

Multi-Functional Composite Coating as a Wear-Resistant Layer for the Bearing in Total Hip Joint Replacement

33.

The effect of alloy compositions on the joint strength of carbon steels welded by the extended hot-rolling process

32.

The effect of alloy compositions on the microstructure and the mechanical strength of oxide scales on four selected steels

31.

The effect of the surface physical properties of polymer substrates on the adhesion and cracking of transparent conductive oxide (TCO) coatings

30.

Designing interlayers to improve the mechanical reliability of transparent conductive oxide coatings on flexible substrates

29.

The crystallinity and mechanical properties of indium tin oxide (ITO) coatings on polymer substrates

28.

이산화탄소 포집용 극박형 Pd - Cu 멤브레인 접합

27.

다기능 친환경 저융점 접합소재 설계 기술 개발

26.

The effect of film microstructures on cracking of transparent conductive oxide (TCO) coatings on polymer substrates

25.

Nucleation and growth of crystalline Indium Tin Oxide (ITO) coatings on polyethylene terephthalate (PET)

24.

다기능 친환경 저융점 접합소재 설계 기술

23.

The cohesive crack and buckle delamination resistances of indium tin oxide (ITO) films on polymeric substrates with ductile metal interlayers

22.

Improving the delamination resistance of indium tin oxide (ITO) coatings on polymeric substrates by O-2 plasma surface treatment

42.