Carnegie Mellon University
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Photocatalytic degradation of bacteriophages evidenced by atomic force microscopy.

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journal contribution
posted on 2013-01-01, 00:00 authored by Emrecan Soylemez, Maarten De BoerMaarten De Boer, Udom Sae-Ueng, Alex EvilevitchAlex Evilevitch, Tom A. Stewart, May Nyman

Methods to supply fresh water are becoming increasingly critical as the world population continues to grow. Small-diameter hazardous microbes such as viruses (20-100 nm diameter) can be filtered by size exclusion, but in this approach the filters are fouled. Thus, in our research, we are investigating an approach in which filters will be reusable. When exposed to ultraviolet (UV) illumination, titanate materials photocatalytically evolve (•)OH and O2(•-) radicals, which attack biological materials. In the proposed approach, titanate nanosheets are deposited on a substrate. Viruses adsorb on these nanosheets and degrade when exposed to UV light. Using atomic force microscopy (AFM), we image adsorbed viruses and demonstrate that they are removed by UV illumination in the presence of the nanosheets, but not in their absence.


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© 2013 Soylemez et al.