Antibacterial and self-cleaning ability of Ag-TiO2film coated on silicone

Sharen Kevin, Slamet

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


This study tried to modify the surface of silicone, which is widely used as a mobile phone case, so it has antibacterial and self-cleaning ability. The silicone surface was coated using Ag-TiO2 (silver-titania), prepared by the photo-assisted deposition (PAD) method. Before the coating process, the hydrophobic silicone surface was treated with UV-C radiation. This study aimed to obtain the optimal Ag (silver) loading on antibacterial and self-sterilization performance and the effect of UV-C irradiation and addition of TEOS (Tetraethyl orthosilicate) to the resulted coating. To see the difference of Ag addition, sampleswere characterized using UV-Vis DRS. The results showed that UV-C irradiation and the addition of TEOS additives wereeffective in producing a strong coating. Under the UV irradiation, the degradation rate of methylene blue dye used to represent the self-cleaning ability. Silicone which was loaded with 0.5% Ag showed 78.09% of degradation within 2 hourswhile the TiO2 only shows 20.09% of degradation. Meanwhile, the addition of larger loading of Ag (1%, 1.5%, 3% and 6%)will reduce the degradation ability. As for the disinfection performance, 1.5% Ag showed the best results among others. Iteffectively decreased the E.coli colonies growth by 20.91%, while the blank and TiO2 (titania) coated silicone respectively showed 10.23% and 0% growth of E.coli colonies within 10 minutes in dark conditions. The addition of larger loading of Ag also showed the same effect as on the self-cleaning test. This kind of silicone is very promising, especially in this pandemic era.

Original languageEnglish
Title of host publicationProceedings of the 7th International Symposium on Applied Chemistry 2021
EditorsMuhammad Al Muttaqii, Kiki Kurniawan, Muhammad Hanafi, Ahmad Randy
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735442658
Publication statusPublished - 5 Dec 2022
Event7th International Symposium on Applied Chemistry 2021, ISAC 2021 - Virtual, Online
Duration: 28 Sept 202130 Sept 2021

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference7th International Symposium on Applied Chemistry 2021, ISAC 2021
CityVirtual, Online


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