posted on 2019-10-25, 18:21authored byJiuk Jang, Hyobeom Kim, Sangyoon Ji, Ha Jun Kim, Min Soo Kang, Tae Soo Kim, Jong-eun Won, Jae-Hyun Lee, Jinwoo Cheon, Kibum Kang, Won Bin Im, Jang-Ung Park
Tactile
pressure sensors as flexible bioelectronic devices have
been regarded as the key component for recently emerging applications
in electronic skins, health-monitoring devices, or human–machine
interfaces. However, their narrow range of sensible pressure and their
difficulty in forming high integrations represent major limitations
for various potential applications. Herein, we report fully integrated,
active-matrix arrays of pressure-sensitive MoS2 transistors
with mechanoluminescent layers and air dielectrics for wide detectable
range from footsteps to cellular motions. The inclusion of mechanoluminescent
materials as well as air spaces can increase the sensitivity significantly
over entire pressure regimes. In addition, the high integration capability
of these active-matrix sensory circuitries can enhance their spatial
resolution to the level sufficient to analyze the pressure distribution
in a single cardiomyocyte. We envision that these wide-range pressure
sensors will provide a new strategy toward next-generation electronics
at biomachine interfaces to monitor various mechanical and biological
phenomena at single-cell resolution.