| 초록 |
Natural materials behold innate handedness or chirality. However control of handedness in artificial materials is still challenging. Strong chiral optical activity can only be achieved for three dimensional (3D) chiral nanostructures with forms of tetrahedral or helical out-of-plane geometries, resembled to the geometries of intrinsic bio-enantiomers, such as amino acid and DNA. Here we present a facile route to self-assemble 3D chiral nanostructures with controllable optical activity in the visible range without using any lithographic process or any intrinsic chiral biomaterials. Also we demonstrated that circularly polarized light can induce self-assembly of nanoparticles into twisted nanoribbons with selective handedness. The artificial chiral nanomaterials would be potentially applicable in advanced applications such as biosensor, pharmaceutical application, and photoelectronic devices. |
