Robust Antibacterial Activity of Xanthan-Gum-Stabilized and Patterned CeO2–x–TiO2 Antifog Films

Guo, Fangwei and Pan, Fei and Zhang, Wenchen and Liu, Tian and Zuber, Flavia and Zhang, Xing and Yu, Yali and Zhang, Ruiji and Niederberger, Markus and Ren, Qun. (2022) Robust Antibacterial Activity of Xanthan-Gum-Stabilized and Patterned CeO2–x–TiO2 Antifog Films. ACS Applied Materials and Interfaces, 14 (39). pp. 44158-44172.

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Official URL: https://edoc.unibas.ch/90031/

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Increased occurrence of antimicrobial resistance leads to a huge burden on patients, the healthcare system, and society worldwide. Developing antimicrobial materials through doping rare-earth elements is a new strategy to overcome this challenge. To this end, we design antibacterial films containing CeO; 2-; x; -TiO; 2; , xanthan gum, poly(acrylic acid), and hyaluronic acid. CeO; 2-; x; -TiO; 2; inks are additionally integrated into a hexagonal grid for prominent transparency. Such design yields not only an antibacterial efficacy of ∼100% toward; Staphylococcus aureus; and; Escherichia coli; but also excellent antifog performance for 72 h in a 100% humidity atmosphere. Moreover, FluidFM is employed to understand the interaction in-depth between bacteria and materials. We further reveal that reactive oxygen species (ROS) are crucial for the bactericidal activity of; E. coli; through fluorescent spectroscopic analysis and SEM imaging. We meanwhile confirm that Ce; 3+; ions are involved in the stripping phosphate groups, damaging the cell membrane of; S. aureus; . Therefore, the hexagonal mesh and xanthan-gum cross-linking chains act as a reservoir for ROS and Ce; 3+; ions, realizing a long-lasting antibacterial function. We hence develop an antibacterial and antifog dual-functional material that has the potential for a broad application in display devices, medical devices, food packaging, and wearable electronics.
Faculties and Departments:05 Faculty of Science
05 Faculty of Science > Departement Chemie
UniBasel Contributors:Pan, Fei
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Chemical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:23 Sep 2023 01:30
Deposited On:20 Oct 2022 06:46

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