A5009610739- Advanced Sensor and Energy Harvesting Materials
- Nanomaterials and Printing Technologies
- Conducting polymers and applications
- Neuroscience and Neural Engineering
- Advanced Materials and Mechanics
- Electrohydrodynamics and Fluid Dynamics
- Advanced Memory and Neural Computing
- Tactile and Sensory Interactions
- Graphene research and applications
- Gas Sensing Nanomaterials and Sensors
- Photoreceptor and optogenetics research
- Additive Manufacturing and 3D Printing Technologies
- Nanowire Synthesis and Applications
- Nanofabrication and Lithography Techniques
- EEG and Brain-Computer Interfaces
- Analytical Chemistry and Sensors
- Ocular Surface and Contact Lens
- Carbon Nanotubes in Composites
- 3D Printing in Biomedical Research
- Microfluidic and Bio-sensing Technologies
- Supercapacitor Materials and Fabrication
- Green IT and Sustainability
- Organic Light-Emitting Diodes Research
- Muscle activation and electromyography studies
- Interactive and Immersive Displays
Yonsei University
2018-2025
Institute for Basic Science
2019-2025
Materials Science & Engineering
2025
Convergence
2025
Advanced Life Science Institute
2025
NanoBio (United States)
2025
Korea Advanced Institute of Science and Technology
2003-2024
Korea Institute of Machinery and Materials
2024
Government of the Republic of Korea
2017-2021
Korea Institute of Radiological and Medical Sciences
2019
Abstract Wearable contact lenses which can monitor physiological parameters have attracted substantial interests due to the capability of direct detection biomarkers contained in body fluids. However, previously reported lens sensors only a single analyte at time. Furthermore, such ocular generally obstruct field vision subject. Here, we developed multifunctional sensor that alleviates some these limitations since it was on an actual lens. It also designed glucose within tears, as well...
Transparent electrodes that can remain electrically conductive and stable under large mechanical deformations are highly desirable for applications in flexible wearable electronics. This paper describes a comprehensive study of the electrical, optical, properties hybrid nanostructures based on two-dimensional graphene networks one-dimensional metal nanowires, their use as transparent stretchable electrodes. Low sheet resistance (33 Ω/sq) with high transmittance (94% visible range), robust...
This study presents a soft, smart contact lens that provides real-time sensing for diabetes through wireless display.
Abstract We developed a transparent and flexible, capacitive fingerprint sensor array with multiplexed, simultaneous detection of tactile pressure finger skin temperature for mobile smart devices. In our approach, networks hybrid nanostructures using ultra-long metal nanofibers finer nanowires were formed as transparent, flexible electrodes multifunctional array. These sensors exhibited excellent optoelectronic properties outstanding reliability against mechanical bending. This has high...
Highly stretchable 2D fabrics are prepared by weaving fibers for a fabric-structured triboelectric nanogenerator (FTENG). The mainly consist of Al wires and polydimethylsiloxane (PDMS) tubes with high-aspect-ratio nanotextured surface vertically aligned nanowires. were produced interlacing the fibers, which was bonded to waterproof fabric all-weather use It showed stable high-output voltage current 40 V 210 μA, corresponding an instantaneous power output 4 mW. FTENG also exhibits high...
Mechanical robustness, electrical and chemical reliabilities of devices against large deformations such as bending stretching have become the key metrics for rapidly emerging wearable electronics. Metallic glasses (MGs) high elastic limit, conductivity, corrosion resistance, which can be promising applications in However, their electronics or transparent electrodes not been extensively explored so far. Here, we demonstrate stretchable using CuZr MGs form nanotrough networks. MG nanotroughs...
We report an unconventional approach for high-resolution, reconfigurable 3D printing using liquid metals stretchable, integrations. A minimum line width of 1.9 μm can be reliably formed direct printing, and printed patterns reconfigured into diverse structures with maintaining pristine resolutions. This reconfiguration performed multiple times, it also generates a thin oxide interface that effective in preventing the spontaneous penetration gallium atoms different metal layers while...
Electrohydrodynamic-inkjet-printed high-resolution complex 3D structures with multiple functional inks are demonstrated. Printed can have a variety of fine patterns, such as vertical or helix-shaped pillars and straight rounded walls, high aspect ratios (greater than ≈50) narrow diameters (≈0.7 μm). Furthermore, the formation freestanding, bridge-like Ag wire on plastic substrates suggests substantial potentials high-precision, flexible interconnects.
Despite various approaches to immunoassay and chromatography for monitoring cortisol concentrations, conventional methods require bulky external equipment, which limits their use as mobile health care systems. Here, we describe a human pilot trial of soft, smart contact lens real-time detection the concentration in tears using smartphone. A sensor formed graphene field-effect transistor can measure with limit 10 pg/ml, is low enough detect tears. In addition, this soft only requires...
Abstract Integrated electronic circuitries with pressure sensors have been extensively researched as a key component for emerging electronics applications such skins and health-monitoring devices. Although existing display high sensitivities, they can only be used specific purposes due to the narrow range of detectable (under tens kPa) difficulty forming highly integrated arrays. However, it is essential develop tactile wide in order use them diverse application areas including medical...
Herein, we report the fabrication of a highly stretchable, transparent gas sensor based on silver nanowire-graphene hybrid nanostructures. Due to its superb mechanical and optical characteristics, fabricated demonstrates outstanding stable performances even under extreme deformation (stable until 20% strain). The integration Bluetooth system or an inductive antenna enables wireless operation sensor. In addition, robustness materials allows device be transferred onto various nonplanar...
The formation of three-dimensional (3D) interconnections is essential in integrated circuit packaging technology. However, conventional interconnection methods, including the wire-bonding process, were developed for rigid structures electronic devices, and they are not applicable to integration soft stretchable devices. Hence, there a strong demand 3D technology that soft, Herein, we introduce material processing required on forms devices substrates with high resolutions. Liquid-metal-based...
Integration of a smart contact lens and heat patch realizes personal management ocular surface diseases wirelessly.
Abstract Electronic retinal prostheses for stimulating neurons are promising vision restoration. However, the rigid electrodes of conventional implants can inflict damage on soft retina tissue. They also have limited selectivity due to their poor proximity target cells in degenerative retina. Here we present a artificial (thickness, 10 μm) where flexible ultrathin photosensitive transistors integrated with three-dimensional stimulation eutectic gallium–indium alloy. Platinum nanoclusters...
Abstract Tears have emerged as a promising alternative to blood for diagnosing diabetes. Despite increasing attempts measure tear glucose using smart contact lenses, the controversy surrounding correlation between and still limits clinical usage of tears. Herein, we present an in-depth investigation wireless soft lens continuous monitoring glucose. This is capable quantitatively levels in basal tears excluding effect reflex which might weaken relationship with Furthermore, this can provide...
Abstract Engineered human cardiac tissues have been utilized for various biomedical applications, including drug testing, disease modeling, and regenerative medicine. However, the applications of derived from pluripotent stem cells are often limited due to their immaturity lack functionality. Therefore, in this study, we establish a perfusable culture system based on vivo-like heart microenvironments improve tissue fabrication. The integrated platform microfluidic chip three-dimensional...
Current soft neural probes are still operated by bulky, rigid electronics mounted to a body, which deteriorate the integrity of device biological systems and restrict free behavior subject. We report soft, conformable interface system that can monitor single-unit activities neurons with long-term stability. The implements in brain, their subsidiary directly printed on cranial surface. high-resolution printing liquid metals forms cellular-scale diameter adaptable lengths. Also, metal-based...