Surfactant Directed Synthesis of Intrinsically Chiral Plasmonic Nanostructures and Precise Tuning of their Optical Activity through Controlled Self‐Assembly

Abstract

Fabrication and transmission of plasmonic chirality is a rapidly developing area of research. While nanoscale chirality is reasonably well explored, research on intrinsically chiral nanostructures, that has ramifications to origin of homochirality, is still in its infancy. Herein, we report the synthesis of dog‐bone shaped chiral gold nanostructures using a chiral cationic surfactant with excess ascorbic acid. Chiral growth is attributed to the specific binding and structure breaking ability of chiral surfactant and ascorbic acid. The controlled assembly of particles facilitated tuning and enhancement of chiral signals. Experimental observations were validated with theoretical simulations modelled in frequency domain with a surface integral‐equation parameterization. Work highlighting the generation and tuning of plasmonic chirality provides new insights into the understanding of intrinsic chirality and paves way for their application in enantioselective catalysis and biosensing.

Chiroptically active copper clusters as platform for enantioselective detection of lysine

“…[1][2][3] Over the past decades, there has been a noteworthy growth in research interest directed toward the synthesis of organic, inorganic, and hybrid chiral materials, spanning from subatomic to nanoscopic and macroscopic length scales. [4][5][6][7][8] The field of chirality saw a renewed interest upon exploration of optical activity at the nanoscale. 9 Metal clusters, due to their unique structural attributes, have emerged as a prominent focal point in this exploration.…”

“…Chirality is a fundamental geometric feature inherent in nature at various length scales 1–3 . Over the past decades, there has been a noteworthy growth in research interest directed toward the synthesis of organic, inorganic, and hybrid chiral materials, spanning from subatomic to nanoscopic and macroscopic length scales 4–8 . The field of chirality saw a renewed interest upon exploration of optical activity at the nanoscale 9 .…”

Engineering copper plasmonic chirality via ligand-induced dissolution for enantioselective recognition of amino acids

“…[17][18][19][20][21] The optical activity in plasmonic nanomaterials is governed by different origins that include (i) structural distortion induced by chiral ligands during nanoparticle synthesis, (ii) assembly of achiral nanoparticles in the presence of chiral templates, and (iii) induced chirality through the hybridization of the electronic states of nanoparticles and chiral ligands. [22][23][24] The generation of chirality and its intriguing applications are well explored in plasmonic nanomaterials, such as gold and silver. [25][26][27] However, the fundamental understanding and applicability of chiral copper nanoparticles (CuNPs) is an area that remains underdeveloped.…”

A sustainable approach for the adsorption of methylene blue from an aqueous background: an adsorbent based on DES/CGS modified GO@ZrO2

“…The last 4-5 decades witnessed a sharp increase in the fundamental progress and prospects of various kinds of materials such as nanomaterials, electronic materials, solvent materials, associated materials, membrane materials, and porous materials among others. [1][2][3][4][5][6][7][8][9][10][11] Among these materials, carbon allotropes attract special attention due to their novel properties and potential application in various elds of life. [12][13][14][15][16] Graphene is the most sought-aer carbon allotrope, both in its pure form and when incorporated into composite materials or utilized in its derived forms, in various areas of scientic and engineering research.…”