A5070926399- Advanced Sensor and Energy Harvesting Materials
- Adhesion, Friction, and Surface Interactions
- Tactile and Sensory Interactions
- Additive Manufacturing and 3D Printing Technologies
- Surface Modification and Superhydrophobicity
- Nanomaterials and Printing Technologies
- Nanofabrication and Lithography Techniques
- Polymer Surface Interaction Studies
- Semiconductor Lasers and Optical Devices
- Tribology and Wear Analysis
- Conducting polymers and applications
- Electrospun Nanofibers in Biomedical Applications
- 3D Printing in Biomedical Research
- Advanced Materials and Mechanics
- Mosquito-borne diseases and control
- EEG and Brain-Computer Interfaces
- Ecology and Conservation Studies
- Force Microscopy Techniques and Applications
- Korean Urban and Social Studies
- Diverse Approaches in Healthcare and Education Studies
- Gaze Tracking and Assistive Technology
- Silk-based biomaterials and applications
- Exercise and Physiological Responses
- Soft Robotics and Applications
- Freshwater macroinvertebrate diversity and ecology
Georgia Institute of Technology
2023-2025
Interface (United States)
2023-2024
The Wallace H. Coulter Department of Biomedical Engineering
2024
Samsung (South Korea)
2022-2023
Ulsan National Institute of Science and Technology
2014-2022
Government of the Republic of Korea
2018
Ulsan College
2018
Seoul Women's University
2011
Abstract Photonic skins enable a direct and intuitive visualization of various physical mechanical stimuli with eye‐readable colorations by intimately laminating to target substrates. Their development is still at infancy compared that electronic skins. Here, an ultra‐adaptable, large‐area (10 × 10 cm 2 ), multipixel (14 14) photonic skin based on naturally abundant sustainable biopolymer shape‐memory, responsive multiphase cellulose derivative presented. The wearable, mainly consists sensor...
A microneedle patch that uses snake fang–inspired multiple open grooves can rapidly deliver liquid-phase drugs and vaccines under capillary action.
A hydrogel-based wet adhesive with bioinspired microstructures can exhibit strong and reversible adhesion to underwater surfaces.
Abstract This study presents a wet‐responsive and biocompatible smart hydrogel adhesive that exhibits switchable controllable adhesions on demand for the simple efficient transfer printing of nanomembranes. The prepared adhesives show adhesion strength as high ≈191 kPa with aid nano‐ or microstructure arrays surface in dry state. When contact water, nano/microscopic macroscopic shape reconfigurations occur, which turns off (≈0.30 kPa) an extremely switching ratio (>640). superior...
Abstract Activities and physical effort have been commonly estimated using a metabolic rate through indirect calorimetry to capture breath information. The represents the work hardness used optimize wearable robotic systems. Thus, personalization rapid optimization of are critical. Although respirometry is gold standard for estimating costs, this method requires heavy, bulky, rigid system, limiting system’s field deployability. Here, paper reports soft, flexible bioelectronic system that...
Abstract Flexible wearable and implantable devices are contributing to the healthcare field by enabling intuitive interfaces with tissues of human body through their thin form factors, which enable more accurate monitoring signals effective delivery therapy. The development such is accompanied an increasing interest in strategies technologies for conformally fixing adhering flexible biomedical place acquire high‐quality biosignals over a long period, even subtle movements target. Owing...
Abstract Low‐dimensional nanomaterials are widely adopted as active sensing elements for electronic skins. When the integrated with microscale architectures, performance of skin is significantly altered. Here, it shown that a high‐performance flexible and stretchable can be produced by incorporating piezoresistive carbon nanotube composite into hierarchical topography micropillar–wrinkle hybrid architectures mimic wrinkles folds in human skin. Owing to unique exhibits versatile superior...
A simple yet scalable strategy for fabricating dry adhesives with mushroom-shaped micropillars is achieved by a combination of the roll-to-roll process and modulated UV-curable elastic poly(urethane acrylate) (e-PUA) resin. The e-PUA combines major benefits commercial PUA poly(dimethylsiloxane) (PDMS). It not only can be cured within few seconds like but also possesses good mechanical properties comparable to those PDMS. roll-type fabrication system equipped rollable mold UV exposure unit...
We present a simple yet scalable method with detailed process protocols for fabricating dry adhesives mushroom-shaped micropillars of controlled tip geometries. The involves using photo-lithography bilayer stack combining SU-8 and lift-off resist, subsequent replica molding process. This approach utilizes widely used commercially available materials can thus be to generate precisely diameters thicknesses in simple, reproducible, cost-effective manner. fabricated micropillar arrays exhibited...
Abstract Flexible, transparent, conductive electrodes are key elements of emerging flexible electronic and energy devices. Such should form an intimate physical contact with various active components devices to ensure stable, low‐resistant electrical contacts. However, formation techniques based largely on conventional soldering, pastes, mechanical clamping, thin film deposition. These generally result in damaged, contaminated, bulky, uncontrollable interfaces. A self‐attachable, flexible,...
Recently, temperature monitoring with practical colorimetric sensors has been highlighted because they can directly visualize the of surfaces without any power sources or electrical transducing systems. Accordingly, several that convert change into visible color alteration through various physical and chemical mechanisms have proposed. However, be used at subzero temperatures detect a wide range not sufficiently explored. Here, we present sensory system temperatures, even below 0 °C. This...
Caterpillars are very successful soft-bodied climbers that navigate in complex environments. This paper develops a multi-segmented robot climbing on vertical surfaces using dry adhesive pads, inspired by caterpillar locomotion. The miniaturized consists of four segments, and each segment uses solenoid actuator with permanent magnet plunger. head body segments adapt novel mechanism Scott-Russell linkages to generate bi-directional plane motion one actuator, resulting reliable attaching...
Athletes are at high risk of dehydration, fatigue, and cardiac disorders due to extreme performance in often harsh environments. Despite advancements sports training protocols, there is an urgent need for a non-invasive system capable comprehensive health monitoring. Although few existing wearables measure athlete's performance, they limited by single function, rigidity, bulkiness, required straps adhesives. Here, all-in-one, multi-sensor integrated wearable utilizing set nanomembrane soft...
Modern brain–computer interfaces (BCI), utilizing electroencephalograms for bidirectional human–machine communication, face significant limitations from movement-vulnerable rigid sensors, inconsistent skin–electrode impedance, and bulky electronics, diminishing the system’s continuous use portability. Here, we introduce motion artifact–controlled micro–brain sensors between hair strands, enabling ultralow impedance density on skin contact long-term usable, persistent BCI with augmented...
Abstract Augmented reality (AR) is a computer graphics technique that creates seamless interface between the real and virtual worlds. AR usage rapidly spreads across diverse areas, such as healthcare, education, entertainment. Despite its immense potential, controls rely on an external joystick, smartphone, or fixed camera system susceptible to lighting. Here, AR‐integrated soft wearable electronic detects gestures of subject for more intuitive, accurate, direct control systems introduced....
Gecko-like dry adhesive using high aspect ratio polymeric nanohairs has insuperable limitations, although it huge potential in many applications. Repeated harsh contacts on a target substrate lead to physical collapse of and significant degradation the adhesion property, because are quite fragile due poor mechanical robustness. Herein, we demonstrate highly robust gecko-like with unidirectionally stooped (diameter 100 nm) (∼9) an ultrathin metal coating. cycles repeated tests 1 N preloading...