Nanowerk February 2, 2024 Although metallic nanostructures are interesting for nanoscience and nanotechnologies, environmental attacks on them can easily initiate cracking on the surface of metals deteriorating their overall functional/structural properties. An international team of researchers (China, Hong Kong, Taiwan) shown that severely oxidized metallic glass nanotubes can attain an ultrahigh recoverable elastic strain at room temperature. They showed that the physical mechanisms underpinning the observed superelasticity could be attributed to the formation of a percolating oxide network in metallic glass nanotubes, which not only restricts atomic-scale plastic events during loading but also leads to the recovery of elastic rigidity […]
Tag Archives: Nanotubes
Nanotube Fibers Stand Strong – But for How Long Under Stresses and Strains?
SciTech Daily December 29, 2021 By combining atomistic models with kinetic Monte Carlo simulations, researchers at Rice University have shown that a pristine carbon nanotube under ambient working conditions is essentially indefatigable accumulating no structural memory of prior load; over time, it probabilistically breaks, abruptly. However, by using coarse-grained modeling they demonstrated that any practical assemblies of nanotubes, e.g., bundles and fibers, display a clear gradual strength degradation in cyclic tensile loading due to recurrence and ratchet-up of slip at the tube-tube interfaces, not occurring under static load even of equal amplitude. They hope to give researchers and industry a […]
Researchers use organic semiconductor nanotubes to create new electrochemical actuator
Phys.org September 3, 2021 To improve the movement and response time for electrochemical actuator devices that operate in liquid a team of researchers at the University of Houston has developed electrochemical actuator that uses specialized organic semiconductor nanotubes (OSNTs). The device demonstrated excellent performance, low power consumption/strain, a large deformation, fast response, and excellent actuation stability. The enormous effective surface area of the nanotubular structure which facilitates the ion transport and accumulation results in high electroactivity and durability. The work provides new opportunities for next-generation actuators that can be utilized in artificial muscles and biomedical devices…read more. TECHNICAL ARTICLE