Photoactive thin-film structures of curcumin, TiO2 and ZnO

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date

2021-06-01

Department

Department of Chemistry and Materials Science

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Language

en

Pages

12

Series

Molecules, Volume 26, issue 11

Abstract

Curcumin is known as a biologically active compound and a possible antimicrobial agent. Here, we combine it with TiO2 and ZnO semiconductors, known for their photocatalytic properties, with an eye towards synergistic photo-harvesting and/or antimicrobial effects. We deposit different nanoscale multi-layer structures of curcumin, TiO2 and ZnO, by combining the solution-based spin-coating (S-C) technique and the gas-phase atomic layer deposition (ALD) and molecular layer deposition (MLD) thin-film techniques. As one of the highlights, we demonstrate for these multi-layer structures a red-shift in the absorbance maximum and an expansion of the absorbance edge as far as the longest visible wavelength region, which activates them for the visible light harvesting. The novel fabrication approaches introduced here should be compatible with, e.g., textile substrates, opening up new horizons for novel applications such as new types of protective masks with thin conformal antimicrobial coatings.

Description

| openaire: EC/H2020/765378/EU//HYCOAT Funding Information: Funding: This research received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement (No. 765378) and the Academy of Finland (Profi 3). Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

Absorption, Atomic/molecular layer deposition, Curcumin, Multi-layered structures, Spin coating, Titanium dioxide, Zinc oxide

Other note

DOI

10.3390/molecules26113214

Citation

Philip, A, Ghiyasi, R & Karppinen, M 2021, ' Photoactive thin-film structures of curcumin, TiO 2 and ZnO ', Molecules, vol. 26, no. 11, 3214 . https://doi.org/10.3390/molecules26113214

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https://urn.fi/URN:NBN:fi:aalto-202107017841

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[article-cris] Kemian tekniikan korkeakoulu / CHEM