Ultrafast graphene sensor monitors your breath while you speak |
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| (Nanowerk Spotlight) Graphene is just spearheading researchers’ foray into the world of two-dimensional (2D) materials. Besides carbon, molybdenum (MoS2), tungsten (WS2), and vanadium (VS2) all promise new material systems with unique properties and performance for a range of application areas. | |
| Functionalized graphene, for instance, holds exceptional promise for biological and chemical sensors. Now, in new work, researchers from the Nokia Research Center in Cambridge, UK, have shown that the distinctive 2D structure of graphene oxide (GO), combined with its superpermeability to water molecules, leads to sensing devices with an unprecedented speed. | |
| « It has been well known that graphene oxide can be very sensitive to water, and that this material is specifically permeable to water molecules, » Stefano Borini, a Principal Researcher at the Nokia Research Center, tells Nanowerk. « However, the ultimate performance in terms of speed had not been reported yet. » | |
| In the November 9, 2013, online edition of ACS Nano (« Ultrafast Graphene Oxide Humidity Sensors »), first-authored by Borini, the Nokia team reports the experimental observation of the unparalleled response speed of humidity sensors based on graphene oxide, which are – to the best of the scientists’ knowledge – the fastest humidity sensors ever reported. | |
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| Transparent, flexible humidity sensor made with graphene oxide. (Image: Stefano Borini, Nokia Research Center) |
Read more: http://www.nanowerk.com/spotlight/spotid=33449.php#ixzz2qH7cN66w
