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Pressure Sensing and Electronic Amplification with Functionalized Graphite–Silicone Composite
Author(s) -
Littlejohn Samuel,
Nogaret Alain,
Prentice Giles M.,
Pantos G. Dan
Publication year - 2013
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201300519
Subject(s) - materials science , composite number , silicone , electronic skin , graphite , pressure sensor , sensitivity (control systems) , composite material , voltage , pressure sensitive , tactile sensor , optoelectronics , electronic engineering , electrical engineering , computer science , mechanical engineering , artificial intelligence , adhesive , layer (electronics) , engineering , robot
A flexible yet electronically active composite that mimics mechanoreceptor neurons in the human skin is synthesized, generating voltage oscillations whose frequency increases with pressure. By encoding pressure into frequency, the sensor achieves a high pressure sensitivity (<10 Pa). The ability to sense pressure and to amplify signals arises from the robust negative differential resistance of functionalized graphitic flakes in silicone.