国内精品视频在线播放,91短视频社区在线观看,国产福利91精品一区二区三区

新聞動態

行業新聞♂碳納米管
♂石墨烯
♂導電劑
♂納米陶瓷粉體
中科新聞

您當前位置：中國科學院成都有機化學有限公司 > 新聞動態 > 碳納米管碳納米管

CNT active matrix makes flexible imager

作者：中國科學院成都有機化學有限公司來源：http://www.sikpqwc.cn 日期：2013-11-27 09:02:06

Researchers at the University of California, Berkeley, and the Lawrence Berkeley National Laboratory have succeeded in fabricating mechanically flexible imagers using nanotube-based active-matrix backplanes. The devices, which can image in both the visible and X-ray range, could be used to make large-area flexible sensor networks for a variety of imaging applications, such as interactive surfaces and displays that can be pasted onto a host of surfaces and objects. The devices that work in the X-ray part of the spectrum might find use in portable medical imaging too.

Nanotube thin film transistors are ideal for making low-power active matrix backplanes on a wide range of substrates, including mechanically flexible plastics. Indeed, researchers have already managed to combine such backplanes with pressure sensors to make electronic “skins”, and with organic light-emitting diodes for flexible displays.

The team, led by Ali Javey, has now exploited these backplanes in another important application: large-area flexible imagers. The researchers made their devices by monolithically integrating organic photodetectors (OPDs) atop a nanotube backplane comprising an 18 x 18 pixel array. The actual size of the array is 2 x 1.5 cm.

Javey and colleagues chose OPD materials that respond to visible light for optical imaging applications. By adding a scintillator film (capable of converting incident X-rays into visible photons that are then detected by the OPDs) on top of the imager, they were also able to fabricate an X-ray light detector.

“The nanotube backplane consists of thin film transistors (TFTs) made using solution-processed semiconductor-enriched carbon nanotubes,” explains team member Zhibin Yu. “Such transistors have high mobilities of up to 50 cm²/V.s and high on-off current ratios of 10⁶,” he told nanotechweb.org. “These values represent a significant advantage over silicon- and organic semiconductor-based devices that often have mobilities two orders of magnitude lower.”

The large-area visible light imager might be used as a new platform to develop interactive surfaces that can be laminated onto a variety of different surfaces, such as flexible plastics, and that can spatially map hand and body movements, he added. The flexible X-ray detector, for its part, might come in handy as a portable X-ray device for medical imaging applications.

The team says that it will now try to integrate a microlens array onto the pixels in its device for tuning light focus depth and increasing the sharpness of the images obtained.

< 上一篇美國研制出世界首片碳納米管中央處理器...碳導線助力機器人產業下一篇 >

色一区二区-色一色在线观看视频网站-色一级-色一涩-日韩欧美一区二区三区四区-日韩欧美一区二区三区在线观看