Journal
APPLIED PHYSICS LETTERS
Volume 105, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4892062
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Funding
- National Research Foundation (NRF) of Korea [2009-0083540, 2012M3A7B4035195]
- Global Ph.D. Fellowship Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2014H1A2A1020941]
- National Research Foundation of Korea [2014H1A2A1020941] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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. (c) 2014 AIP Publishing LLC.
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