Figure 2.

Fabrication method of Bouligand structures via stacking. (a) SEM images of multilayers with stacked Au nanorods and device illustration. (b) Frequency response variation with rotated and layered nanorods. Wider bandwidth was observed for 7-layered structure compared to 2-layered structure. The black and red lines represent the frequency response variation of RCP and LCP, respectively. Reprinted from [29] with permission from Springer Nature. (c) Representation of nano-wire alignment method using Langmuir–Blodgett technique and layered chiral film with opposite handedness. CD spectra with respect to layered structures are also shown. Reprinted from [50] with permission from John Wiley and Sons. (d) (Top) Illustration of nanowire alignment via spray deposition technique and optical activity graphs of chirally aligned and stacked structures. (Bottom) SEM images of chiral Au wires stacked at 60° rotation. Reprinted with permission from [52]. Copyright 2021 American Chemical Society. (e) Schematic of Au@Fe_xO_y nanowire assembly via external magnetic field and chiral structure, along with optical microscopy images of fabricated bilayered structure. Color differentiated based on orientation. (f) CD spectra corresponding to numbers of nanowire layers. Reprinted with permission from [52]. Copyright 2022 American Chemical Society.