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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)
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)
We have successfully manufactured a large-area power transmission sheet by using printing technologies. The position of electronic objects on this sheet can be contactlessly sensed by electromagnetic coupling using an organic transistor active matrix. Power is selectively fed to the objects by an electromagnetic field using a plastic MEMS-switching matrix.
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  made with plastic MEMS switches and… (More)
—We have successfully fabricated a large-area flexible ultrasonic imaging system by integrating a polymeric ultrasonic-transducer array sheet with an active matrix of organic field-effect transistors. The ultrasonic sheet comprises 8 × 8 ultrasonic sensing cells with an effective size of 25 × 25 cm 2. The organic transistors exhibit mobility of 0.1 and 0.5… (More)
—A novel communication system which simultaneously achieves the mobility of wireless communication and the low-power performance of wireline communication is developed with a printable sheet. By combining meter-scale wireline communication and micrometer-scale wireless capacitive-coupling communication, the proposed communication system enables multiple… (More)
1. Introduction Low-power wireless communications between electronic objects scattered over tables, walls and ceiling will form an infrastructure necessary for wireless sensor networks and ambient intelligence. This paper presents a novel communication method which simultaneously achieves the mobility of wireless communication and the low-power performance… (More)