Issue 31, 2024

Chiral mesostructured In2O3 films twisted along different crystal orientations

Abstract

Chiral mesostructured In2O3 films (CMIFs) composed of nanoflakes with exposed facets of (30[3 with combining macron]0) and (10[1 with combining macron]4) (referred to as CMIFs-30[3 with combining macron]0 and CMIFs-10[1 with combining macron]4) were synthesized using a malic acid (Mal)-assisted hydrothermal method, with or without the addition of trisodium citrate dihydrate as the structure directing agent. Density functional theory (DFT) calculations and molecular dynamics (MD) simulations suggest that the asymmetric displacement of In and O atoms generated by the chemical bonding of Mal on the crystal plane of as-prepared InOOH is the geometric basis for triggering the chiral distortion in the In2O3 crystal lattice and further hierarchical chirality in the CMIFs. After adding Na3C6H5O7·2H2O, the preferential adsorption facet of Mal on InOOH crystal transforms from (0001) to (10[1 with combining macron]0) due to the stronger interaction between the Na3C6H5O7·2H2O and the (0001) plane, arising from its multiple carboxyl groups. This results in different helical axes of nanoflakes in CMIFs-10[1 with combining macron]4 and CMIFs-30[3 with combining macron]0. Both CMIFs-10[1 with combining macron]4 and CMIFs-30[3 with combining macron]0 exhibit spin chiral anisotropy (SChA), with the manifestation of external magnetic field-independent but chirality-dependent asymmetric magnetic circular dichroism (MCD) due to the dominant contribution from chirality-induced effective magnetic fields when electrons move in a helical potential.

Graphical abstract: Chiral mesostructured In2O3 films twisted along different crystal orientations

Supplementary files

Article information

Article type
Paper
Submitted
02 апр 2024
Accepted
18 юни 2024
First published
19 юни 2024

J. Mater. Chem. C, 2024,12, 11763-11768

Chiral mesostructured In2O3 films twisted along different crystal orientations

T. Ji, H. Chen, J. Ai, L. Han, Z. Qu, S. Che and Y. Duan, J. Mater. Chem. C, 2024, 12, 11763 DOI: 10.1039/D4TC01339E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements