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Chiral Metal-Oxide Nanofilms by Cellulose Template Using Atomic Layer Deposition Process.

Ortal Lidor-Shalev1, Nikolaos Pliatsikas2, Yacov Carmiel1

  • 1Department of Chemistry and the Institute for Nanotechnology and Advanced Materials Bar-Ilan University , Ramat-Gan 5290002, Israel.

ACS Nano
|April 22, 2017
PubMed
Summary

Researchers developed a new method using atomic layer deposition to create chiral metal-oxide nanofilms on cellulose fibers. These novel chiral nanofilms show promise for enantioselective applications, including crystallization.

Keywords:
X-ray photoelectron spectroscopyatomic layer depositionchiral surfacechiralitynanomaterials

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chirality Studies

Background:

  • Chiral materials are crucial for enantioselective processes.
  • Fabricating ordered chiral nanostructures remains a challenge.
  • Metal-oxide nanofilms offer unique properties for advanced applications.

Purpose of the Study:

  • To develop an advanced approach for fabricating chiral metal-oxide nanofilms.
  • To utilize cellulose microfibers as chiral templates for nanofilm deposition.
  • To demonstrate the enantioselective capabilities of the fabricated nanofilms.

Main Methods:

  • Atomic layer deposition (ALD) of titania and alumina onto cellulose microfibers.
  • Characterization using X-ray photoelectron spectroscopy (XPS) and high-resolution electron microscopy (HREM).
  • Evaluation of chirality through enantioselective adsorption experiments (circular dichroism spectroscopy, chiral HPLC).

Main Results:

  • Successfully fabricated chiral metal-oxide nanofilms with a spatial fibrous structure.
  • Confirmed the chiral properties of titania nanofilms using spectroscopic and chromatographic methods.
  • Demonstrated the utility of these nanofilms in enantioselective crystallization.

Conclusions:

  • The study presents a viable method for preparing chiral nanofilms via ALD.
  • Cellulose microfibers serve as effective chiral templates.
  • The developed chiral nanofilms have significant potential for various enantioselective applications.