A5072770677- Advanced Sensor and Energy Harvesting Materials
- Tactile and Sensory Interactions
- Conducting polymers and applications
- Nanomaterials and Printing Technologies
- Interactive and Immersive Displays
- Textile materials and evaluations
- Gas Sensing Nanomaterials and Sensors
- CCD and CMOS Imaging Sensors
- Teleoperation and Haptic Systems
- Advanced Memory and Neural Computing
- Electrospun Nanofibers in Biomedical Applications
- Advanced Materials and Mechanics
- Surface Modification and Superhydrophobicity
- Perovskite Materials and Applications
- Polydiacetylene-based materials and applications
- Soft Robotics and Applications
- Innovation in Digital Healthcare Systems
- Technology and Data Analysis
- Neuroscience and Neural Engineering
- Analog and Mixed-Signal Circuit Design
- Internet of Things and Social Network Interactions
- Muscle activation and electromyography studies
- Advanced Computing and Algorithms
- ZnO doping and properties
- Advanced Chemical Sensor Technologies
Electronics and Telecommunications Research Institute
2021-2025
Korea Advanced Institute of Science and Technology
2021
University of Science and Technology
2021
The University of Tokyo
2016-2020
Tokyo University of Information Sciences
2020
Delivery of electronic functionality to the human body using e‐textiles is important for realizing future wearable electronics. Printing a promising process large scale manufacturing e‐textile since it enables arbitrary patterns simple and inexpensive process. However, conductive inks printed atop textile are vulnerable cracking because deformable porous structure textiles. The authors develop mechanically electrically robust wiring by controlling ink permeation in textile. This done...
Flexible organic optoelectronic devices simultaneously targeting mechanical conformability and fast responsivity in the near-infrared (IR) region are a prerequisite to expand capabilities of practical optical science engineering for on-skin applications. Here, an ultraflexible near-IR responsive skin-conformal photoplethysmogram sensor based on bulk heterojunction photovoltaic active layer containing regioregular polyindacenodithiophene-pyridyl[2,1,3]thiadiazole-cyclopentadithiophene (PIPCP)...
Abstract Accurate and unobtrusive monitoring of surface biopotentials is paramount importance for physiological studies wearable healthcare applications. Thin, light‐weight, conformal bioelectrodes are highly desirable biopotential monitoring. This report demonstrates the fabrication sub‐300 nm thin, dry electrodes that self‐adhesive conformable to complex 3D biological surfaces thus capable excellent quality (surface electromyogram electrocardiogram) recordings. Measurements reveal...
The prolonged and continuous monitoring of mechanoacoustic heart signals is essential for the early diagnosis cardiovascular diseases. These bodily acoustics have low intensity frequency, measuring them continuously long periods requires ultrasensitive, lightweight, gas-permeable sensors. Here, we present an all-nanofiber sensor, which exhibits a sensitivity as high 10,050.6 mV Pa
On-skin electronics require conductive, porous, and stretchable materials for a stable operation with minimal invasiveness to the human body. However, porous elastic conductors that simultaneously achieve high conductivity, good stretchability, durability are rare owing lack of proper design adhesion between polymer conductive metallic networks. Here, simple fabrication approach nanomesh-type is shown by designing layer-by-layer structure nanofibers/nanowires (NFs/NWs) via interfacial...
Abstract Virtual reality and augmented (VR/AR) are evolving. The market demands innovation efforts call for a shift in the key VR/AR technologies engaging people virtually. Tele‐haptics with multimodal bilateral interactions emerging as future of industry. By transmitting receiving haptic sensations wirelessly, tele‐haptics allow human‐to‐human beyond traditional interactions. core include tactile sensing feedback based on highly advanced sensors actuators. Recent developments innovations...
Soft and stretchable electrodes are essential components for skin-tight wearable devices, which can provide comfortable, unobtrusive, accurate physiological monitoring physical sensing applications such as healthcare, medical treatment, human-machine interfaces. Metal–elastomer nanocomposites a promising approach, enabling high conductivity stretchability derived from metallic conduction percolation networks of metal nano/micro fillers. However, their practical application is still limited...
Abstract Realizing highly immersive tactile interactions requires a skin-integrated, untethered, high-definition transducer devices that can record and generate stimuli. However, the rigid bulky form factor, insufficient resolution of existing actuators are hindering reproduction sophisticated sensations user experiences. Here, we demonstrate an ultra-flexible interface with high spatial 1.8 mm for telehaptic communication on human skin. Dual mechanism sensors sub-mm scale piezoceramic...
Abstract Mechanically durable transparent electrodes are needed in flexible optoelectronic devices to realize their long‐term stable functioning, for applications various fields such as energy, healthcare, and soft robotics. Several promising based on nanomaterials have been previously reported replace the conventional fragile indium‐tin oxide (ITO); however, obtaining feasible printed ultraflexible with a multistack structure is still great challenge. Here, ultrathin (uniform thickness of...
Sensing-actuation systems can assist a bladder with lost sensation and weak muscle control. Here, we advance the relevant technology by integrating soft thin capacitive sensor shape memory alloy-based actuator to achieve high-performance closed-loop configuration. In our design, sensors capable of continuous volume detection actuators strong emptying force have been used. This integration has previously hindered performance due large changes. Our solution integrates sensing-actuation...
Abstract To accurately probe the tactile information on soft skin, it is critical for pressure sensing array to be free of noise and inter-taxel crosstalk, irrespective measurement condition. However, dynamically moving surfaces, which are common conditions on-skin robotic applications, obtaining precise without compromising performance a significant challenge due mechanical coupling between sensors with surface. In this work, multi-level architectural design micro-pyramids trapezoid-shaped...
This paper presents a 72-channel resistive-sensor interface integrated circuit (IC). The proposed IC consists of 8 sensor oscillator units and reference clock generator. (S-OSC) generate pulses with pulse widths dependent on the input values, are oversampled by using frequency dividers. time-domain signals fed to time-to-digital converters (TDCs) converted digital values. Each S-OSC unit is time-multiplexed measure resistance values from 9 sensors. Multiple phases highly energy-efficient...
Tele-Haptic Interactions In article number 2008831, Hye Jin Kim and co-workers review the current status for opportunities of active material-based haptic technology with a focus on VR/AR applications. Tele-haptics multimodal bilateral interactions are emerging as future industry. The core technologies tele-haptics include sensing feedback or tactile recognitions regenerations based highly advanced sensors actuators.
Multimodal tactile sensors have played an important role in enhancing robot intelligence by providing reliable datasets originating from their high accuracy and durability characteristics. Herein, bimodal capable of simultaneously recognizing the size stiffness grasped objects, even deformable ones, are produced. The fabricated using identical process controlling air gap between a flexible substrate sensing layer, allowing sensorized gripper to measure pressure bending characteristics with...
In article number 1802359, Takao Someya and co-workers demonstrate ultraflexible near-infrared organic photodetectors that simultaneously exhibit high-speed light responsivity the smallest bending radius (r = 3 μm). Stable operation is secured under severe mechanical deformation, even when device attached to a curved and/or folded part of human skin. Using this ultrathin photodetector, fingerprint-conformal photoplethysmogram sensor demonstrated.
In article number 1903446, Kenjiro Fukuda, Takao Someya, and co-workers demonstrate a simple fabrication approach for porous nanomesh-type elastic conductors consisting of Ag nanowires polyurethane nanofibers. The simultaneously achieve high conductivity (9190 S cm−1), stretchability (310%), good durability. Without any adhesive gel/tape, the can be utilized as skin-attachable strain sensors dry biosignal-sensing electrodes.
In article number 1707526, Kenjiro Fukuda, Takao Someya, and co-workers demonstrate printed transparent electrodes that consist of a silver mesh with feature size 5 μm 100 nm in width thickness, on 1 μm-thick polyimide substrates. These simultaneously achieve high conductivity, transmittance, excellent mechanical durability. As demonstration to replace indium tin oxide (ITO) ultraflexible optoelectronics, organic photovoltaics using the Ag show power conversion efficiency 8.3%, which is...
Bimodal Tactile Sensors The back cover illustrates an intelligent gripper integrated with bimodal tactile sensors (bending strain and pressure) that can recognize the size elastic stiffness of object (tomato) very accurately, mimicking human cognitive processes using fingers or hands. sensor-based system detects information determines whether it is a good quality tomato not. For further details see article number 2300317 by Hye Jin Kim co-workers.