11 Jan 21:23
by Antoine Reserbat-Plantey
Active control of optical fields at the nanoscale is difficult to achieve. Here, the authors fabricate an on-chip graphene NEMS suspended a few tens of nanometres above nitrogen vacancy centres and demonstrate electromechanical control of the photons emitted by electrostatic tuning of the graphene NEMS position.
Nature Communications doi: 10.1038/ncomms10218
Authors: Antoine Reserbat-Plantey, Kevin G. Schädler, Louis Gaudreau, Gabriele Navickaite, Johannes Güttinger, Darrick Chang, Costanza Toninelli, Adrian Bachtold, Frank H. L. Koppens
27 May 16:04
by Satoshi Takamizawa, Yasuhiro Miyamoto
Superelastic materials (crystal-to-crystal transformation pseudo elasticity) that consist of organic components have not been observed since superelasticity was discovered in a Au-Cd alloy in 1932. Superelastic materials have been exclusively developed in metallic or inorganic covalent solids, as represented by Ti-Ni alloys. Organosuperelasticity is now revealed in a pure organic crystal of terephthalamide, which precisely produces a large motion with high repetition and high energy storage efficiency. This process is driven by a small shear stress owing to the low density of strain energy related to the low lattice energy.
A pure organic crystal of terephthalamide exhibits superelasticity (crystal-to-crystal transformation pseudo elasticity). A large motion is produced precisely with high repetition and high energy storage efficiency. This process is driven by a small shear stress owing to the low density of strain energy, which is related to the low lattice energy.