Researchers at the National University of Singapore (NUS) have developed a new sensor material that has high sensitivity but low hysteresis, paving the way for more accurate wearable health technology and robotic sensing.
The researchers created a process to crack metal thin films into ring-shaped patterns on polydimethylsiloxane (PDMS), then integrated the flexible metal/PDMS film with electrodes and substrates for a piezoresistive sensor.
The resulting material, dubbed TRACE, or Tactile Resistive Annularly Cracked E-Skin, performs five times better than conventional soft materials.
Said NUS's Benjamin Tee, "Our long-term goal is to predict cardiovascular health in the form of a tiny smart patch that is placed on human skin.
"This TRACE sensor is a step forward towards that reality because the data it can capture for pulse velocities is more accurate, and can also be equipped with machine learning algorithms to predict surface textures more accurately."
From NUS News (Singapore)
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