A flexible graphene touch sensor in the general human touch range

We present a transparent touch sensor based on single layers of graphene that works under a gentle touch. Using the flexible characteristics of graphene, a touching event and a vertical force are measured by a change in the channel conductance. In contrast to the previous graphene gauge sensors, thi...

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Veröffentlicht in:Applied physics letters 2014-07, Vol.105 (4)
Hauptverfasser: Chun, Sungwoo, Kim, Youngjun, Jung, Hyojin, Park, Wanjun
Format: Artikel
Sprache:eng
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Zusammenfassung:We present a transparent touch sensor based on single layers of graphene that works under a gentle touch. Using the flexible characteristics of graphene, a touching event and a vertical force are measured by a change in the channel conductance. In contrast to the previous graphene gauge sensors, this is an alternative scheme that responds to a vertical force using the contacting properties of two isolated and patterned single graphene layers. This sensor responded to pressures ranging from 1 to 14 kPa, corresponding to the lowest human perception. In addition, we outline the processing methods for handling single layers of graphene for the integration of devices on transparent and flexible substrates.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4892062