Controlling Helical Pitch of Chiral Supramolecular Nanofibers Composed of Two Amphiphiles

Abstract

In a previous work, we demonstrated that an amidoamine amphiphile with a stearyl group as the alkyl chain (C18AA) and 12-hydroxystearic acid (HSA) can produce hydrogels consisting of self-assembled chiral nanofibers with a homogeneous helical structure. In this work, we investigate the effect of introducing a double bond into the alkyl chain, i.e., substituting the oleyl group for a stearyl group, on the formation of the hydrogel and the structure of the chiral nanofibers. Combining the amphiphile with the oleyl group (OleylAA) and HSA produced hydrogels, although the self-assembled chiral nanofibers in the hydrogels had a different composition, helical pitch, and diameter than those formed by C18AA and HSA mixtures. Further, we demonstrate that the chiral nanofibers can be used as a soft template for preparing chiral Au nanowires.

Nanoarchitectonics for Hierarchical Fullerene Nanomaterials

“…In addition to these nanomaterials and materials with internal nanostructures, materials prepared through assembly and aggregation of small units have also become important in the exploration of functional materials. Such materials have been prepared through self-assembly processes in supramolecular chemistry [ 70 , 71 , 72 , 73 ] as well as artificial fabrication processes such as the self-assembled monolayer (SAM) method [ 74 , 75 , 76 ], Langmuir–Blodgett (LB) technique [ 77 , 78 , 79 , 80 ], and layer-by-layer (LbL) assembly [ 81 , 82 , 83 ]. These approaches have been thus far examined as separated and independent methodologies.…”

Nanoarchitectonics at Interfaces for Regulations of Biorelated Phenomena: Small Structures with Big Effects

“…[ 6 ] Various component small structures can be assembled into microscopic and macroscopic objects with specific structures and advanced functions. Such examples can be seen in various research efforts such as assemblies from designed amphiphiles to microstructures with regular helix [ 7 ] and nanotube [ 8 ] morphologies, assemblies of amino acid derivatives for electrical devices, [ 9 ] peptide assemblies for bioimaging [ 10 ] and biomedical applications, [ 11 ] programmed DNA assemblies to molecular machines, [ 12 ] and assemblies of liquid crystalline for ion conductors. [ 13 ] The similar strategy can be applied for assemblies of nanomaterials other than molecules.…”

Hierarchical Chiral Supramolecular Nanoarchitectonics with Molecular Detection: Helical Structure Controls upon Self‐Assembly and Coassembly

“…[ 9 ] Notably, chirality is also extended to the supramolecular level, and the stereochemical communication or chiral–chiral interaction between various chiral molecules becomes extremely important. [ 10 ] Molecular chirality has been well explored but the importance of supramolecular chirality and its biofunction has not yet been fully recognized. [ 11 ]…”

“…[9] Notably, chirality is also extended to the supramolecular level, and the stereochemical communication or chiral-chiral interaction between various chiral molecules becomes extremely important. [10] Molecular chirality has been well explored but the importance of supramolecular chirality and its biofunction has not yet been fully recognized. [11] The self-assembly of chiral molecules into various architectures can be expressed across a broad range of structures, such as helices, Möbius strips, and gyroids.…”