A5004712180- Advanced Sensor and Energy Harvesting Materials
- Electronic Packaging and Soldering Technologies
- Nanomaterials and Printing Technologies
- 3D IC and TSV technologies
- Conducting polymers and applications
- Tactile and Sensory Interactions
- Advanced Welding Techniques Analysis
- MXene and MAX Phase Materials
- Integrated Circuits and Semiconductor Failure Analysis
- Nanofabrication and Lithography Techniques
- Advanced Memory and Neural Computing
- Aluminum Alloys Composites Properties
- ZnO doping and properties
- Electromagnetic Compatibility and Noise Suppression
- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- Quantum Dots Synthesis And Properties
- Gas Sensing Nanomaterials and Sensors
- Advanced Materials and Mechanics
- Synthesis and properties of polymers
- Thin-Film Transistor Technologies
- Polydiacetylene-based materials and applications
- Additive Manufacturing and 3D Printing Technologies
- 2D Materials and Applications
- Dielectric materials and actuators
Sungkyunkwan University
2003-2024
Seoul National University
2017-2023
Jeonbuk National University
2017-2022
Materials Development (United States)
2022
Chonbuk National University Hospital
2017-2019
Government of the Republic of Korea
2017-2019
Jeonju University
2017-2019
Korea Electronics Technology Institute
2010-2017
Seonam University
2015-2016
Kim's Eye Hospital
2016
Abstract A smooth, ultra-flexible and transparent electrode was developed from silver nanowires (AgNWs) embedded in a colorless polyimide (cPI) by utilizing an inverted film-processing method. The resulting AgNW-cPI composite had transparency of >80%, low sheet resistance 8 Ω/□ ultra-smooth surfaces comparable to glass. Leveraging the robust mechanical properties flexibility cPI, thickness film reduced less than 10 μm, which is conducive extreme flexibility. This exhibited durability, for...
Abstract The emergence of high-form-factor electronics has led to a demand for high-density integration inorganic thin-film devices and circuits with full stretchability. However, the intrinsic stiffness brittleness materials have impeded their utilization in free-form electronics. Here, we demonstrate highly integrated strain-insensitive stretchable metal-oxide transistors circuitry (442 transistors/cm 2 ) via photolithography-based bottom-up approach, where fluidic liquid metal...
A highly flexible and transparent conductive electrode based on consecutively stacked layers of polymer (CP) silver nanowires (AgNWs) fully embedded in a colorless polyimide (cPI) is achieved by utilizing an inverted layer‐by‐layer processing method. This CP‐AgNW composite exhibits high transparency >92% at wavelengths 450–700 nm low resistivity 7.7 Ω ◻ −1 , while its ultrasmooth surface provides large contact area for pathways. Furthermore, it demonstrates unprecedentedly flexibility...
A new approach to the fabrication of a transparent, stretchable and pressure-sensitive capacitor was developed by employing single layer Ag nanowire-based electrodes polymer.
Crack-based strain sensor systems have been known for its high sensitivity, but suffer from the small fracture of thin metal films employed in which results negligible stretchability. Herein, we fabricated a transparent (>90% at 550 nm wavelength), stretchable (up to 100%), and sensitive (gauge factor (GF) 30 100% strain) gauge by depositing an encapsulated crack-induced Ag nanowire (AgNW) network on hydroxylated poly(dimethylsiloxane) (PDMS) film. Stretching AgNWs/PDMS resulted formation...
Abstract Mimicking human skin sensation such as spontaneous multimodal perception and identification/discrimination of intermixed stimuli is severely hindered by the difficulty efficient integration complex cutaneous receptor‐emulating circuitry lack an appropriate protocol to discern signals. Here, a highly stretchable cross‐reactive sensor matrix demonstrated, which can detect, classify, discriminate various tactile thermal using machine‐learning approach. Particularly, ability achieved...
Transparent electrodes based on conventional indium–tin oxide (ITO) can hardly meet the requirements of future generations stretchable electronic devices, including artificial skins, displays, sensors, and actuators, because they cannot retain high conductivity under substantial stretching bending deformation. Here we suggest a new approach for fabricating highly transparent with good stability in environments where would be stretched repeatedly. We designed polyurethane–urea (PUU),...
Purpose:The Asia-Pacific Burden of Respiratory Diseases (APBORD) study is a cross-sectional, observational one which has used standard protocol to examine the disease and economic burden allergic rhinitis (AR), asthma, chronic obstructive pulmonary disorder (COPD), rhinosinusitis across region.Here, we report on symptoms, healthcare resource use, work impairment, associated costs in Korea.Methods: Consecutive participants aged ≥18 years with primary diagnosis AR, COPD, or were...
Realization of devices with enhanced stretchability and waterproof properties will significantly expand the reach electronics. To this end, we herein fabricate an elastic transparent conductor that comprises silver nanowires (AgNWs) on a hydroxylated polydimethylsiloxane (PDMS) substrate covered by polyurethane urea (PUU), which is fully compatible both materials. Carboxylic acid groups PUU was designed to form hydrogen bonds carbonyl poly(vinylpyrrolidone) AgNW surface, resulting in...
Network structures of metal nanowires are a promising candidate for producing wide range flexible electronic devices, but only if they can be suitably patterned and retained on various materials. Here we present new approach to the patterning by employing intense-pulsed-light (IPL) irradiation reduce process just two steps: subsequent removal nonirradiated nanowires. This ultrasimple method eliminates need employ chemical reagents etching or improving adhesion nanowires, is compatible with...
The increasing prevalence of health problems stemming from sedentary lifestyles and evolving workplace cultures has placed a substantial burden on healthcare systems. Consequently, remote wearable monitoring systems have emerged as essential tools to track individuals' well-being. Self-powered triboelectric nanogenerators (TENGs) exhibited significant potential for use emerging detection devices capable recognizing body movements breathing patterns. However, several challenges remain be...
Abstract This article reviews the increasing need for innovative transparent and conductive electrodes (TCEs) modern optoelectronics, flexible electronics, sensors, biomedical devices as alternatives to brittle scarce conventional indium tin oxide (ITO). Among various TCE materials explored, silver nanowires (AgNWs) have emerged a promising candidate replace ITO, thanks their remarkable properties. However, AgNW‐based TCEs can present limitations such thermal instability, high contact...
Ti3C2Tx MXene, a two-dimensional transition metal carbide, has attracted substantial interest due to its unique physical properties and wide range of potential applications. Although the devices using MXene have been substantially enhanced in recent years, it is not fully understood how oxygen concentration Ti3AlC2 MAX affects oxide formation Ti3C2-based nanosheets their fundamental properties. To this end, we compared two types phases: with low content (LO-MAX) synthesized by conventional...
This study delves into the development of a novel 10 by sensor array featuring 100 pressure pixels, achieving remarkable sensitivity up to 888.79 kPa
A transparent electrode comprising Ag nanowires and a polyurethane equipped with Diels–Alder adducts as crosslinkers was successfully fabricated to realize rapidly amendable electrode.
This study was carried out to grow an understanding of the microstructural development friction stir welding on AZ91D magnesium alloy and evaluate mechanical properties welds. plates with thickness 4 mm were used, weld zone investigated using optical scanning electron microscopes. Square butt welded joint good quality obtained under 187 mm/min travel speed tool rotation speeds range 115 131 rad·s−1. The microstructure near welds consisted SZ (Stir Zone) which has fine equiaxed grains no...