Emergent dynamic chirality in a thermally driven artificial spin ratchet.

Modern nanofabrication techniques have opened the possibility to create novel functional materials, whose properties transcend those of their constituent elements. In particular, tuning the magnetostatic interactions in geometrically frustrated arrangements of nanoelements called artificial spin ice can lead to specific collective behaviour, including emergent magnetic monopoles, charge screening and transport, as well as magnonic response. Here, we demonstrate a spin-ice-based active material in which energy is converted into unidirectional dynamics.

[Synthesis of several benzyloxphenyl derivatives with local anesthetic activity (author's transl)].

Several 2- and 4-benzyloxy- and 4-(2'- and 4'-substituted) benzyloxy-beta-substituted amino-propiophenones, some of the corresponding alcohols, some 4-benzyloxy-alpha-substituted amino-acetophenones were synthetised and tested for their pharmacological activity.