Self‐Assembly of Chiral Plasmonic Nanostructures

Abstract

Plasmonic chiroptical effects have attracted significant attention for their widespread potential applications in negative-refractive-index materials, advanced light-polarization filters, and ultrasensitive sensing devices, etc. As compared to top-down fabrication methods, the bottom-up self-assembly strategy provides nanoscale resolution, parallel production, and isotropic optical response, and therefore plays an indispensable role in the fabrication of chiral plasmonic nanostructures. The optical properties of these chiral structures can be predicted based on the near-field coupling of localized surface plasmons in structural components, which offers a route to tune or enhance optical activity by selecting building blocks and designing structural configurations. To date, three main types of chiral plasmonic nanostructures, i.e., chiral "plasmonic molecules", chiral superstructures, and chiral-molecule-metal hybrid complexes, are usually assembled, in which metal nanoparticles with various sizes, shapes, and compositions, and/or chiral molecules are employed as building blocks. Here, recent achievements in the self-assembly of chiral plasmonic nanostructures are highlighted and perspectives on the future directions of chiral plasmonics integrated with bottom-up self-assembly are presented, showing three typical examples, including chiral plasmonic switches, chiral nanoparticles, and chiral metamaterials.

Probing Adsorption Behaviors of BSA onto Chiral Surfaces of Nanoparticles

“…Nanosized chiral formations show diversity, involving either single objects with intrinsically chiral crystal/chiral configuration or the assembly of several subunits into tridimensional chiral structures . It is always difficult to determine the differences in protein binding behaviors on different chiral surfaces, because these are sometimes too weak to distinguish.…”

Colloid‐Interface‐Assisted Laser Irradiation of Nanocrystals Superlattices to be Scalable Plasmonic Superstructures with Novel Activities

“…With the achievements of chemical synthesis of the monodisperse colloidal nanocrystals (NCs) over the past 2 decades, the bottom‐up self‐assembly strategies of such NCs to be multifunctional superstructures at bulk scale are critical for their electronic and optoelectronic devices applications. Such strategies include the interface‐assisted assemble superlattices (SLs), DNA‐based sequence‐specific bonding assemble structures, direct NC pattern optical lithography by photochemically active cation/anion groups, self‐assemblies by NC micelle to diamond‐like supercrystals, and so on . In as‐formed NC assembly SLs, the coupling interactions of constituent NCs are usually limited in the application of film‐scale devices as a result of the interparticle spacing produced by long‐chain organic ligands .…”

“…Such strategies include the interfaceassisted assemble superlattices (SLs), DNA-based sequence-specific bonding assemble structures, direct NC pattern optical lithography by photochemically active cation/anion groups, self-assemblies by NC micelle to diamond-like supercrystals, and so on. [1][2][3][4][5][6][7][8][9][10] In as-formed NC assembly SLs, the coupling interactions of constituent NCs are usually limited in the application of film-scale devices as a result of the interparticle spacing produced by long-chain organic ligands. [11][12][13][14] For example, such insulating ligands at building block surfaces can generate a barrier for the electronic transport.…”

Spiral Patterning of Au Nanoparticles on Au Nanorod Surface to Form Chiral AuNR@AuNP Helical Superstructures Templated by DNA Origami

“…[1][2][3][4][5] Accurate fabrication of regiospecific plasmonic assemblies is crucial for understanding the coherent interactions among constituent nanoparticles. [1][2][3][4][5] Accurate fabrication of regiospecific plasmonic assemblies is crucial for understanding the coherent interactions among constituent nanoparticles.…”