A5041244264- Advanced Sensor and Energy Harvesting Materials
- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Advanced Memory and Neural Computing
- Neuroscience and Neural Engineering
- Thin-Film Transistor Technologies
- Tactile and Sensory Interactions
- Analytical Chemistry and Sensors
- Nanomaterials and Printing Technologies
- Nanowire Synthesis and Applications
- Molecular Junctions and Nanostructures
- Semiconductor materials and devices
- Gas Sensing Nanomaterials and Sensors
- Physics of Superconductivity and Magnetism
- Nanofabrication and Lithography Techniques
- EEG and Brain-Computer Interfaces
- Interactive and Immersive Displays
- Organic Light-Emitting Diodes Research
- Force Microscopy Techniques and Applications
- Wireless Power Transfer Systems
- Magnetic properties of thin films
- Energy Harvesting in Wireless Networks
- Advanced Condensed Matter Physics
- Advanced MEMS and NEMS Technologies
- Advancements in Semiconductor Devices and Circuit Design
Osaka University
2016-2025
Osaka Research Institute of Industrial Science and Technology
2015-2025
National Institute of Advanced Industrial Science and Technology
2008-2024
Sanken Electric (Japan)
2021-2023
The University of Tokyo
2008-2017
Japan Science and Technology Agency
2008-2017
Tokyo University of Information Sciences
2012-2014
Hiroshima University
2012
National Museum of Emerging Science and Innovation
2008
It is now widely accepted that skin sensitivity will be very important for future robots used by humans in daily life housekeeping and entertainment purposes. Despite this fact, relatively little progress has been made the field of pressure recognition compared to areas sight voice recognition, mainly because good artificial “electronic skin” with a large area mechanical flexibility not yet available. The fabrication sensitive consisting thousands sensors would require flexible switching...
Application-specific requirements for future lighting, displays and photovoltaics will include large-area, low-weight mechanical resilience dual-purpose uses such as electronic skin, textiles surface conforming foils. Here we demonstrate polymer-based photovoltaic devices on plastic foil substrates less than 2 μm thick, with equal power conversion efficiency to their glass-based counterparts. They can reversibly withstand extreme deformation have unprecedented solar cell-specific weight....
Skin-like sensitivity, or the capability to recognize tactile information, will be an essential feature of future generations robots, enabling them operate in unstructured environments. Recently developed large-area pressure sensors made with organic transistors have been proposed for electronic artificial skin (E-skin) applications. These are bendable down a 2-mm radius, size that is sufficiently small fabrication human-sized robot fingers. Natural human skin, however, far more complex than...
By using an ionic liquid of 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, we uniformly dispersed single-walled carbon nanotubes (SWNTs) as chemically stable dopants in a vinylidene fluoride-hexafluoropropylene copolymer matrix to form composite film. We found that the SWNT content can be increased up 20 weight percent without reducing mechanical flexibility or softness copolymer. The film was coated with dimethyl-siloxane-based rubber, which exhibited conductivity 57...
Using organic transistors with a floating gate embedded in hybrid dielectrics that comprise 2-nanometer-thick molecular self-assembled monolayer and 4-nanometer-thick plasma-grown metal oxide, we have realized nonvolatile memory arrays on flexible plastic substrates. The small thickness of the allows very program erase voltages (< or = 6 volts) to produce large, nonvolatile, reversible threshold-voltage shift. endure more than 1000 cycles, which is within two orders magnitude silicon-based...
Abstract The development of advanced flexible large-area electronics such as displays and sensors will thrive on engineered functional ink formulations for printed where the spontaneous arrangement molecules aids printing processes. Here we report a printable elastic conductor with high initial conductivity 738 S cm −1 record 182 when stretched to 215% strain. is comprised Ag flakes, fluorine rubber surfactant. surfactant constitutes key component which directs formation surface-localized...
A major obstacle to the development of organic transistors for large-area sensor, display, and circuit applications is fundamental compromise between manufacturing efficiency, transistor performance, power consumption. In past, improving efficiency through use printing techniques has inevitably resulted in significantly lower performance increased consumption, while attempts improve or reduce have led higher process temperatures cost. Here, we lift this limitation by demonstrating...
Significance We have successfully fabricated very unique ultraflexible temperature sensors that exhibit changes in resistivity by six orders of magnitude or more for a change only 5 °C less. Our approach offers an ideal solution to measure over large area with high spatial resolution, sensitivity 0.1 less, and fast response time 100 ms. Indeed, such our can significantly simplify the readout circuitry, which was key demonstrate, knowledge, world’s first successful measurement dynamic lung...
Bottom-gate, top-contact organic thin-film transistors (TFTs) with excellent static characteristics (on/off ratio: 107; intrinsic mobility: 3 cm2 (V s)−1) and fast unipolar ring oscillators (signal delay as short 230 ns per stage) are fabricated. The significant contribution of the transfer length to relation between channel length, contact resistance, effective mobility, cutoff frequency TFTs is theoretically experimentally analyzed. Detailed facts importance specialist readers published...
Extensive intramolecular π-conjugation is considered to be requisite in the design of organic semiconductors. Here, two inkjet pigments, epindolidione and quinacridone, that break this rule are explored. These molecules afford intermolecular π-stacking reinforced by hydrogen-bonding bridges. Air-stable field effect transistors reported support mobilities up 1.5 cm2/Vs with T80 lifetimes comparable most stable semiconducting materials.
In vivo electronic monitoring systems are promising technology to obtain biosignals with high spatiotemporal resolution and sensitivity. Here we demonstrate the fabrication of a biocompatible highly conductive gel composite comprising multi-walled carbon nanotube-dispersed sheet an aqueous hydrogel. This exhibits admittance 100 mS cm(-2) maintains even in low-frequency range. On implantation into living hypodermal tissue for 4 weeks, it showed small foreign-body reaction compared widely used...
Abstract Future electronic skin aims to mimic nature’s original both in functionality and appearance. Although some of the multifaceted properties human may remain exclusive biological system, electronics opens a unique path that leads beyond imitation could equip us with unfamiliar senses. Here we demonstrate giant magnetoresistive sensor foils high sensitivity, unmatched flexibility mechanical endurance. They are <2 μm thick, extremely flexible (bending radii <3 μm), lightweight (≈3...
Abstract Energy autonomy and conformability are essential elements in the next generation of wearable flexible electronics for healthcare, robotics cyber-physical systems. This study presents ferroelectric polymer transducers organic diodes imperceptible sensing energy harvesting systems, which integrated on ultrathin (1-µm) substrates, thus imparting them with excellent flexibility. Simulations show that sensitivity ultraflexible is strongly enhanced by using an substrate, allows mounting...
A large-area, flexible, and lightweight sheet image scanner has been successfully manufactured on a plastic film by integrating high-quality organic transistors photodetectors. The effective sensing area of the integrated device is 5/spl times/5 cm/sup 2/; resolution, 36 dots per inch (dpi); total number sensor cells, 5184. pentacene with top contact geometry have channel length 18 /spl mu/m mobility 0.7 2//Vs. Organic photodetectors composed copper phthalocyanine...
Flexible transistors and circuits based on dinaphtho-[2,3-b:2′,3′-f]thieno[3,2-b]thiophene (DNTT), a conjugated semiconductor with large ionization potential (5.4 eV), are reported. The have mobility of 0.6 cm2 V−1 s−1 the ring oscillators stage delay 18 µs. Due to excellent stability semiconductor, devices maintain 50% their initial performance for period 8 months in ambient air. Detailed facts importance specialist readers published as "Supporting Information". Such documents...