Yoshiaki Noguchi

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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 a composite film. We found that the SWNT content can be increased up to 20 weight percent without reducing(More)
Skin-like sensitivity, or the capability to recognize tactile information, will be an essential feature of future generations of robots, enabling them to 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 sensors are(More)
A major obstacle to the development of organic transistors for large-area sensor, display, and circuit applications is the fundamental compromise between manufacturing efficiency, transistor performance, and power consumption. In the past, improving the manufacturing efficiency through the use of printing techniques has inevitably resulted in significantly(More)
Ubiquitous electronics or ambient intelligence is attracting attention because of its potential to open up a new class of applications. This paper reports the first implementation of a large-area wireless power transmission system (Fig. 1) using organic transistors (1-9) and MEMS switches. The system realizes a low-cost sheet-type wireless power source of(More)
We fabricated ultra-flexible pentacene field-effect transistors (FETs) with a mobility of 0.5 cm/Vs and an on/off ratio of 10, which are functional at the bending radius less than 1 mm. The transistors are manufactured on a 13-μm-thick polyimide film and covered by a 13-μm-thick poly-chloro-para-xylylene encapsulation layer so that transistors can be(More)
The electronics fields face serious problems associated with electric power; these include the development of ecologically friendly power-generation systems and ultralow-power-consuming circuits. Moreover, there is a demand for developing new power-transmission methods in the imminent era of ambient electronics, in which a multitude of electronic devices(More)
Wireless power delivery to electronic objects scattered over tables, walls and ceilings will form an infrastructure necessary for ubiquitous electronics, wireless sensor networks and ambient intelligence. Described here are design innovations to overcome the shortcomings of a previous wireless power transmission sheet [1] made with plastic MEMS switches and(More)