Scientists at Chung-Ang University, South Korea have uncovered advanced manufacturing strategies for piezoelectric and triboelectric tactile sensors which are used for wearable technologies as well as robotics.
The sensors are designed to convert mechanical stimuli into electrical signals which make them key components in intelligent systems like robotics and wearables.
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Piezoelectric sensors leverage voltage generation through mechanical stress in non-centrosymmetric materials like quartz and polyvinylidene fluoride, while triboelectric sensors operate on contact-induced charge transfer. Both sensor types offer unique advantages, including self-powered functionality and high sensitivity but also face challenges, such as material brittleness and environmental limitations.
A team of researchers led by Professor Hanjun Ryu from Chung-Ang University, South Korea, has introduced novel manufacturing strategies to overcome these limitations.
The team conducted a comprehensive review of manufacturing strategies for piezoelectric and triboelectric tactile sensors, focusing on techniques to enhance sensitivity, flexibility, and self-powering capabilities.
Notable advancements include using lead-free ceramics and polymer blends to create flexible, environmentally friendly sensors suitable for dynamic applications. The integration of 3D printing and solvent-based crystallisation techniques was also found to significantly improve the sensitivity and adaptability of these sensors.
Professor Hanjun Ryu from Chung-Ang University, South Korea, said: “Our study explains the materials and device fabrication strategies for tactile sensors using piezoelectric and triboelectric effects, as well as the types of sensory recognition”
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