In this article, we describe an advance approach for the fabrication of chiral metal-oxide nanofilms. Our approach is based on the atomic layer deposition of titania and alumina nanofilms onto cellulose microfibers, used as chiral templates, leading to the formation of chiral nanofilms with a spatial fibrous structure. The chiral nanofilms were extensively characterized by X-ray photoelectron spectroscopy and high-resolution electron microscopy. The chiral property of the produced titania nanofilms was studied by enantioselective adsorption experiments using circular-dichroism spectroscopy and chiral high-performance liquid chromatography. We demonstrate the application of the titania chiral nanofilms for enantioselective crystallization. Overall, the basic principle for the preparation of chiral nanofilms by atomic layer deposition is demonstrated, as well as their uses for several enantioselective applications.
Bibliographical noteFunding Information:
This research was supported by the Israel Science Foundation (ISF) (Grant No. 775/11). Ortal Lidor-Shalev would like to acknowledge the Ministry of Science, Technology & Space, Israel, for a PhD scholarship, and for the COST organization and European cooperation in science and technology (HERALD COST action MP1402). The authors would like to acknowledge Yafit Fleger for the help in He-FIB images.
© 2017 American Chemical Society.
- X-ray photoelectron spectroscopy
- atomic layer deposition
- chiral surface