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ACS Nano. 2013 Dec 23;7(12):11166-73. doi: 10.1021/nn404889b. Epub 2013 Nov 12.

Ultrafast graphene oxide humidity sensors.

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Nokia Research Center, 21 JJ Thomson Avenue, Madingley Road, Cambridge CB3 0JE, United Kingdom.


Sensors allow an electronic device to become a gateway between the digital and physical worlds, and sensor materials with unprecedented performance can create new applications and new avenues for user interaction. Graphene oxide can be exploited in humidity and temperature sensors with a number of convenient features such as flexibility, transparency and suitability for large-scale manufacturing. Here we show that the two-dimensional nature of graphene oxide and its superpermeability to water combine to enable humidity sensors with unprecedented response speed (∼30 ms response and recovery times). This opens the door to various applications, such as touchless user interfaces, which we demonstrate with a 'whistling' recognition analysis.

[Indexed for MEDLINE]

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