Department of Chemistry and Materials Science, Aalto University, FI-00076 Espoo, Finland.
Molecules. 2021 May 27;26(11):3214. doi: 10.3390/molecules26113214.
Curcumin is known as a biologically active compound and a possible antimicrobial agent. Here, we combine it with TiO 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, TiO 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.
姜黄素是一种具有生物活性的化合物，也是一种有潜力的抗菌剂。在这里，我们将其与 TiO 和 ZnO 半导体结合，这些半导体以其光催化特性而闻名，旨在实现协同的光捕获和/或抗菌效果。我们通过结合基于溶液的旋涂（S-C）技术以及气相原子层沉积（ALD）和分子层沉积（MLD）薄膜技术，沉积了不同的纳米级多层结构的姜黄素、TiO 和 ZnO。作为亮点之一，我们证明了这些多层结构的吸收最大值红移，以及吸收边缘扩展到最长的可见光区域，这使得它们能够用于可见光的捕获。这里介绍的新型制造方法应该与例如纺织品基底兼容，为新型应用开辟了新的前景，例如带有薄且适应性抗菌涂层的新型防护口罩。
