Photocatalytic Reversible Color Switching Based on Titania Nanoparticles. Issue 2 (6th December 2017)

• Record Type: Journal Article
• Authors: Wang, Wenshou; Liu, Luntao; Feng, Ji; Yin, Yadong
• Is Part Of: Small methods. Volume 2:Issue 2(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-12-06
• Subjects: photoreversible color switching -- redox dyes -- redox pigments -- rewritable paper -- titanium dioxide; Nanotechnology -- Methodology -- Periodicals; Nanotechnology -- Periodicals; Periodicals; 620.5028
• DOI: 10.1002/smtd.201700273
• Languages: English
• ISSNs: 2366-9608

Abstract

Abstract: The photoreversible color switching system holds great promise for applications in display and signage technologies, sensing devices, and security features, because light, in comparison to other stimuli such as heat and electricity, has the advantages of noninvasiveness and easy control of parameters including wavelength, intensity, coverage area, and illumination duration. Here, the recent advances in the design and synthesis of titania nanoparticles for catalytic photoreversible color switching of redox dyes and pigments, along with their applications in ink‐free, light‐printable rewritable paper and colorimetric oxygen indicators, are reviewed. Specifically, the importance of surface engineering and defect manipulation of titania nanoparticles for the color‐switching purpose, by introducing a number of methods including surface binding of sacrificial capping ligands and creating oxygen vacancies through doping of metal ions, is highlighted. Finally, a summary and perspectives on current challenges and future research directions in this field are given. Abstract : Photoreversible color switching refers to the reversible transformation of chemical species between two forms having different absorption spectra, induced in one or both directions by the illumination of light. The recent advances in TiO2 nanoparticles‐catalyzed photoreversible color switching of redox dyes and pigments are reviewed. Perspectives on current challenges and future research directions on this field are discussed.