A5065355139- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Dielectric materials and actuators
- Ionic liquids properties and applications
- Advanced Materials and Mechanics
- Neuroscience and Neural Engineering
- Advanced Battery Materials and Technologies
- Tactile and Sensory Interactions
- Polymer composites and self-healing
- Electronic and Structural Properties of Oxides
- Additive Manufacturing and 3D Printing Technologies
- Electrospun Nanofibers in Biomedical Applications
- Organic Electronics and Photovoltaics
- Modular Robots and Swarm Intelligence
- Supercapacitor Materials and Fabrication
- Sensor Technology and Measurement Systems
- Photopolymerization techniques and applications
- Micro and Nano Robotics
- Transport Systems and Technology
- 3D Printing in Biomedical Research
- Transition Metal Oxide Nanomaterials
- Muscle activation and electromyography studies
- Urban and spatial planning
- Advanced Polymer Synthesis and Characterization
- Electrochemical sensors and biosensors
Tokyo Institute of Technology
2021-2024
Shanghai Institute for Science of Science
2024
Institute of Science Tokyo
2024
Yokohama National University
2018-2020
University of Yamanashi
2012-2018
Takeda (Japan)
2018
Abstract Ion gels, composed of macromolecular networks filled by ionic liquids (ILs), are promising candidate soft solid electrolytes for use in wearable/flexible electronic devices. In this context, the introduction a self‐healing function would significantly improve long‐term durability ion gels subject to mechanical loading. Nevertheless, compared hydrogels and organogels, has barely investigated been because there being insufficient understanding interactions between polymers ILs....
Capture and real-time recording of precise body movements using strain sensors provide personal information for healthcare monitoring management. To acquire this information, a sensor that conforms to curved irregular surfaces, including biological tissue, is desired record complex while acting like second skin avoid interference with the movements. In study, we developed thin-film-type capacitive flexible stretchable on surface living body. We fabricated conductive polymeric ultrathin films...
Poly(3,4-ethylenedioxythiophene) doped with poly(4-styrenesulfonate) (PEDOT/PSS) was synthesized by oxidative polymerization and pH dependence of structure electrical conductivity the cast films were investigated means UV-vis-NIR, XRD, AFM analyses, four-point technique. It found that neutralization PEDOT/PSS NaOH decreased absorption bipolarons representing PEDOT in highly state disrupted π-π stacking crystalline structure, which lowered six orders magnitude increasing from 1.7 to 13.
Debonding-on-demand adhesives were designed by fabricating photochemical reversible bonds and using dynamic polymer cleavage flow generation mechanisms.
Abstract Skin‐contact dielectric elastomer actuators (DEAs) consisting of skin‐conformable, stretchable electrodes are fabricated using a roll‐to‐roll‐based gravure coating method. In this method, single‐walled carbon nanotubes (SWCNTs) continuously applied on free‐standing ultra‐thin film (nanosheet) poly(styrene‐ b ‐butadiene‐ ‐styrene) (SBS) to produce an SWCNT‐SBS nanosheet 101‐nm thickness. After the first SWCNT coating, shows Young's modulus (i.e., 80.9 MPa) comparable that SBS and...
Poly(3,4-ethylenedioxythiophene) doped with poly(4-styrenesulfonate) (PEDOT/PSS) various PSS composition ratios (α) was synthesized by oxidative polymerization and particle size distribution zeta potential of the resulting colloidal gel particles were investigated means a dynamic light scattering technique. It found that mean volume diameter PEDOT/PSS 400-600 nm at α = 1~6, which drastically decreased to ~10 8~15. On other hand, about -80 mV regardless ratio. The electrical conductivity cast...
Abstract To increase safety and reduce the electric circuit cost, dielectric elastomer actuators (DEAs) must operate below kV range. The simplest strategy to voltage operation is decrease membrane thickness. This research aims demonstrate DEAs with a nanometric uniform thickness that can at low (below 70 V) high frequency. We use roll-to-roll process fabricate 600 nm thick stretchable PDMS (polydimethylsiloxane) nanosheet 200 conductive nanosheet. These nanosheet-DEAs are tested in...
Abstract Herein, we report on conductive ultrathin films (nanosheets) with the characteristics of stretchability and water vapor permeability for skin-conformable bioelectrodes. The are fabricated by combining fibrous networks single-wall carbon nanotubes (SWCNTs) poly(styrene- b -butadiene- -styrene) (SBS) nanosheets (i.e., SWCNT-SBS nanosheets). An increase in number SWCNT coatings increases both thicknesses densities bundles. SBS coated three layers SWCNTs 3rd-SBS nanosheets) show...
The emergence of soft robots with “flexible motion” is expected to be improved by incorporating flexible energy harvesting technology and electronic devices excellent biocompatibility. Therefore, it important improve the design performance device itself, according adherend which applied. In this study, we outline from a mechanical viewpoint introduce our recent achievements.
Abstract The interface between skin and electrodes plays a major role in the accuracy efficiency of biopotential measurements. For reliable biosignal recording, stable low‐impedance contact is required target tissue. Conventional wet (Ag/AgCl) are composed metal with skin‐adhesive hydrogel. However, for long‐term measurement, direct pre‐gel electrode causes discomfort irritation, especially infants people sensitive because adhesiveness In this study, low‐adhesive reported by exploiting...
Abstract The roll‐to‐roll (R2R) process for fabricating elastic substrates is essential the social implementation of next‐generation stretchable devices with soft interfaces. In recent years, there a growing demand heterostructures multiple monolithically patterned organic materials. However, continuous processing technique using highly wiring has not yet been developed. Conventional manufacturing methods electronics lack production capacity. This study introduces an R2R‐based method...
This study realizes a continuous printing fabrication process for large-area and mass production of stretchable devices on Roll to (R2R) process. is composed R2R dispensing processes achieve the that contain hard soft layers based substrate, liquid metal wirings between circuit elements which are mounted substrate. Hence, can be fabricated stably consistently by using this all-printing work will contribute social implementation devices.
We report electrochemical properties of a Li+-based solvate ionic liquid (SIL) and its application to gate dielectrics for electric double layer transistors (EDLTs). It is found that the capacitance SIL increases with strengthening negative polarization working electrode due possible desolvation cations in SIL. The transfer characteristics SrTiO3-based EDLT show dramatic improvement when used dielectric. present result proposes guideline high performance EDLTs, leading development...
We developed a simulator to practice the digital disimpaction technique, kind of excretory care that is commonly performed by home-care nurses in Japan. The key point this study requirements for creating simulation model were not known advance, so we adopted rapid prototyping method, which product development carried out repeatedly and testing simple prototypes user-participatory design where feedback obtained directly from users. proceeded with definition simultaneously, repeating process...
Aqueous dispersions of poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS) with various PSS composition ratios (α) were newly synthesized and electromechanical properties the PEDOT/PSS solid films investigated for applications to high-strain electro-active polymer (EAP) actuators. The electrical conductivity showed a maximum 210 S/cm at α = 3, while degree water vapor sorption increased increasing both relative humidity (RH). EAP actuating behavior demonstrated that film...
<title>Abstract</title> We report on conductive ultrathin films with stretchability and water vapor permeability for skin-conformable bioelectrodes. The are fabricated by combining fibrous networks of single-wall carbon nanotubes (SWCNTs) poly(styrene-<italic>b</italic>-butadiene-<italic>b</italic>-styrene) (SBS) nanosheets (i.e., SWCNT-SBS nanosheets). increase in the number SWCNT coatings raises not only thickness but also density bundles. SBS nanosheet coated three layers SWCNTs 3rd-SBS...
Soft materials consisting of ionic liquids and polymers have been recognized as a new class advanced attracted significant attention in the past decade. Compared with conventional soft composed molecular solvents, liquid/polymer composites exhibit very unique properties such negligible vapor pressure, thermal stability, non–flammability high conductivity maintaining self–standing ability. Herein, we review recent advances composite comprised ion–conducting polymer membranes applied for...