Bridging Nanocrystals to Robust, Multifunctional, Bulk Materials through Nature-Inspired, Hierarchical Design

31 October 2022, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

Self-assembly of nano-building blocks has emerged as a key tool to direct the arrangement and the collective properties of nanomaterials. Nevertheless, the lack of control over larger length scales when nanomaterials are processed typically leads to defects which scale with the dimensions of the specimen. This ultimately limits their structural integrity and hence their development beyond microscale materials and devices. Herein, we propose a new, versatile approach to fabricate at low temperatures a nature-inspired composite material based on self-similar, hard, inorganic structures interconnected via soft, organic layers on two hierarchy levels. The final macroscale composite material presents a robust architecture while still maintaining the instrinsic nano-characteristic, functional properties derived from its nano-building blocks. The obtained nanocrystalline magnetite-based material has a high bending strength, significantly improved fracture toughness, high saturation magnetization and a low coercivity while portraying an adjustable, macroscopic shape in the cm-scale. The presented nanocomposite design, therefore, allows to obtain macroscale components with multifunctional properties fostered through nanoscale features and hence enables advancing nanomaterials towards large-scale engineering applications.

Supplementary materials

Title
Description
Actions
Title
Supporting Information
Description
Starting nanocrystal characterization; epoxy thermoset formulation; extended information on the self-assembled materials, 2D SAXS pattern and FTIR spectra of functionalized supraparticles; Microscopy images, further nanoindentation data, further 3-point-bending of composite materials; determination of fracture resistance curves of the final composites; X-ray diffractograms, further VSM data, and electric conductivity data of the composite materials.
Actions

Comments

Comments are not moderated before they are posted, but they can be removed by the site moderators if they are found to be in contravention of our Commenting Policy [opens in a new tab] - please read this policy before you post. Comments should be used for scholarly discussion of the content in question. You can find more information about how to use the commenting feature here [opens in a new tab] .
This site is protected by reCAPTCHA and the Google Privacy Policy [opens in a new tab] and Terms of Service [opens in a new tab] apply.