Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 28, Pages 24111-24117Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b05515
Keywords
graphene; pressure sensor; wrinkled structures; anodic aluminum oxide; flexible electronics
Funding
- Guangdong Natural Science Foundation [2016A030313346, 2014A030306022]
- Guangdong Youth Top-notch Talent Support Program [2015TQ01C201]
- Fundamental Research Funds for the Central Universities [16lgzd02]
- University of Macau [SRG2016-00002-FST]
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Nature-motivated pressure sensors have been greatly important components integrated into flexible electronics and applied in artificial intelligence. Here, we report a high sensitivity, ultrathin, and transparent pressure sensor based on wrinkled graphene prepared by a facile liquid-phase shrink method. Two pieces of wrinkled graphene are face to face assembled into a pressure sensor, in which a porous anodic aluminum oxide (AAO) membrane with the thickness of only 200 nm was used to insulate the two layers of graphene. The pressure sensor exhibits ultrahigh operating sensitivity (6.92 kPa(-1)), resulting from the insulation in its inactive state and conduction under compression. Formation of current pathways is attributed to the contact of graphene wrinkles through the pores of AAO membrane. In addition, the pressure Sensor is also an on/off and energy saving device, due to the complete isolation between the two graphene layers when the sensor is not subjected to any pressure. We believe that our high-performance pressure sensor is an ideal candidate for integration in flexible electronics, but also paves the way for other 2D materials to be involved in the fabrication of pressure sensors.
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