Nanowerk December 16, 2024 An international team of researchers (Republic of Korea, Viet Nam) developed a concept of a mechanochromic strain sensor based on magnetic field self-assembled amorphous photonic arrays (APAs) of magnetoplasmonic Ag@Fe3O4 core–shell nanoparticles. The nanoparticles had tunable color spans and fully reversible mechanochromic shift when triggered by stretching or deformation events. In particular, the designed sensors exhibit dynamic color-switching covering various range of reflectance shifts in the visible wavelength region. The most apparent blue-to-red color shift was observed with 176 nm nanoparticles. They investigated the role of surface plasmon resonance coupling in producing the mechanochromic effect. The […]
Tag Archives: Strain sensors
Flexible strain sensor enabled by carbon nanofibers can ‘read lips’
Phys.org November 29, 2022 While high sensitivity and wide working range are desired key parameters for a strain sensor, they are usually contrary to each other to be achieved on the same sensor due to the tight structure dependence of both. Researchers in China used an integrated membrane containing both parallel aligned and randomly aligned carbon nanofibers (CNFs) to design a flexible strain sensor with high sensitivity and wide strain detection range. The parallel aligned CNF membrane (p-CNF) exhibited a low strain detection limit and high sensitivity, while the random aligned CNF membrane (r-CNF) exhibits a large strain detection range. […]
Wireless, ultra-thin and battery-free strain sensors that are 10 times more sensitive
EurekAlert December 15, 2020 Performance of conventional strain sensors has always been limited by the nature of sensing materials used, and users have limited options of customizing the sensors for specific applications. Researchers in Singapore have developed flexible, stretchable, and electrically conductive nanomaterials called MXenes and fabricated strain sensors which are ultra-thin, battery-free and transmit data wirelessly. The sensors are 10 times more sensitive when measuring minute movements of industrial robotic arms, compared to existing technology. In precision manufacturing it helps improve the overall safety of robotic arms by providing automated feedback on precise movements with an error margin below […]