10 Realization of Artificial Chirality in Micro-/Nano-Scale …
255
Fig. 10.9 Molecular self-assembly to produce 3D chiral nanostructures. a, b Dark-field STEM
imaging of Te nanostructure with chiral shape. Experimentally-measured c extinction and d circular
dichroism spectra. e Schematic of asymmetric growth of high-index surfaces. f Schematics and
SEM images of chiral NPs from different view angles. g Circular dichroism spectra of particles
synthesized using peptides that have opposite handedness. (a–d) from [42] and (e–g) from [43]
optical resonance effect as a result of inter-particle interaction [53]. Chiral assembly
can be manufactured using self-organization of achiral molecules. Liquid crystals
spontaneously assemble helical structures (Fig. 10.10a) that exhibit high sensitivity
on plasmonic perturbation, in which handedness of the superstructure is determined
by whether NIR irradiation is exposed or removed [54]. Achiral particles can also
arranged in a mirror-symmetry broken pattern by using twisted fibers or layers called
Fig. 10.10 Molecular chiral self-assembly with achiral NP. a Superstructures of chiral liquid crystal
and their handedness differ when NIR irradiation is on or off. b Chiral plasmonic structures with
layered CNC scaffold. c Assembly of gold NPs on peptide nanotube; arrows: opposite chirality.
d Gold NP double helices based on peptide superstructures. (a) from [54], (b) from [56], (c) from
[57], and (d) from [58]
255
Fig. 10.9 Molecular self-assembly to produce 3D chiral nanostructures. a, b Dark-field STEM
imaging of Te nanostructure with chiral shape. Experimentally-measured c extinction and d circular
dichroism spectra. e Schematic of asymmetric growth of high-index surfaces. f Schematics and
SEM images of chiral NPs from different view angles. g Circular dichroism spectra of particles
synthesized using peptides that have opposite handedness. (a–d) from [42] and (e–g) from [43]
optical resonance effect as a result of inter-particle interaction [53]. Chiral assembly
can be manufactured using self-organization of achiral molecules. Liquid crystals
spontaneously assemble helical structures (Fig. 10.10a) that exhibit high sensitivity
on plasmonic perturbation, in which handedness of the superstructure is determined
by whether NIR irradiation is exposed or removed [54]. Achiral particles can also
arranged in a mirror-symmetry broken pattern by using twisted fibers or layers called
Fig. 10.10 Molecular chiral self-assembly with achiral NP. a Superstructures of chiral liquid crystal
and their handedness differ when NIR irradiation is on or off. b Chiral plasmonic structures with
layered CNC scaffold. c Assembly of gold NPs on peptide nanotube; arrows: opposite chirality.
d Gold NP double helices based on peptide superstructures. (a) from [54], (b) from [56], (c) from
[57], and (d) from [58]