Chiral Plasmonic Nanostructures Enabled by Bottom-Up Approaches

Abstract

We present a comprehensive review of recent developments in the field of chiral plasmonics. Significant advances have been made recently in understanding the working principles of chiral plasmonic structures. With advances in micro- and nanofabrication techniques, a variety of chiral plasmonic nanostructures have been experimentally realized; these tailored chiroptical properties vastly outperform those of their molecular counterparts. We focus on chiral plasmonic nanostructures created using bottom-up approaches, which not only allow for rational design and fabrication but most intriguingly in many cases also enable dynamic manipulation and tuning of chiroptical responses. We first discuss plasmon-induced chirality, resulting from the interaction of chiral molecules with plasmonic excitations. Subsequently, we discuss intrinsically chiral colloids, which give rise to optical chirality owing to their chiral shapes. Finally, we discuss plasmonic chirality, achieved by arranging achiral plasmonic particles into handed configurations on static or active templates. Chiral plasmonic nanostructures are very promising candidates for real-life applications owing to their significantly larger optical chirality than natural molecules. In addition, chiral plasmonic nanostructures offer engineerable and dynamic chiroptical responses, which are formidable to achieve in molecular systems. We thus anticipate that the field of chiral plasmonics will attract further widespread attention in applications ranging from enantioselective analysis to chiral sensing, structural determination, and in situ ultrasensitive detection of multiple disease biomarkers, as well as optical monitoring of transmembrane transport and intracellular metabolism.

Chiral Surface Lattice Resonances

“…The fabrication of chiral 3D nanostructures is challenging for both, bottom‐up and top‐down methods. [ 14–16 ] Recently, the excitation of SLRs was seen in self‐assembled, large area colloidal systems. [ 17,18 ] Such systems offer the possibility for fast manufacturing and covering large‐areas on different substrate materials.…”

Chiral 432 Helicoid II Nanoparticle Synthesized with Glutathione and Poly(T)20 Nucleotide

“…Chirality, a structural property prevalent in nature, refers to a geometrical orientation being non‐superimposable to each other. Especially in the field of plasmonics, strong chiral light‐matter interaction has been one of the fundamental needs with its wide potential application in chiral recognition sensing, optical metamaterials, enantioselective catalysis, and opto‐tele communication technologies . In this sense, relentless efforts have been dedicated to the construction of chiral plasmonic nanostructures using E‐beam lithography, direct laser writing, and macromolecular assembly .…”

“…Especially in the field of plasmonics, strong chiral lightmatter interaction has been one of the fundamental needs with its wide potential application in chiral recognition sensing, optical metamaterials, enantioselective catalysis, and opto-tele communication technologies. [1][2][3][4][5][6][7][8][9] In this sense, relentless efforts have been dedicated to the construction of chiral plasmonic nanostructures using E-beam lithography, [10][11][12] direct laser writing, [13,14] and macromolecular assembly. [15][16][17][18][19][20] Despite sophisticated control of chiral nanostructures, state of the art technologies require complicated synthetic processes and have limitations on constructible morphologies.…”

DNA‐Based Adaptive Plasmonic Logic Gates

“…Plasmonic logic gates have emerged with advanced top-down techniques, which generally work on solid substrates as all-optical devices. [21,22] Thei ntegration of these two systems would produce logic gates with more versatilities,enhanced compatibilities and novel characteristics.I nt he past years,b ridging of DNAnanotechnology and nanoplasmonics has yielded an effective route to build plasmonic nanostructures by bottomup approaches, [23,24] especially with chiroptical properties. [25][26][27][28][29][30][31][32][33] Herein, we report self-assembled, DNA-based plasmonic logic gates which return plasmonic chiroptical signals as outputs by processing molecular inputs of DNAs trands.W e programmed logic gates that can perform ac omplete set of Boolean logical operations (AND,OR, NAND,NOR, XOR and XNOR).…”