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      Water-Driven Micromotors for Rapid Photocatalytic Degradation of Biological and Chemical Warfare Agents

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          Abstract

          Threats of chemical and biological warfare agents (CBWA) represent a serious global concern and require rapid and efficient neutralization methods. We present a highly effective micromotor strategy for photocatalytic degradation of CBWA based on light-activated TiO2/Au/Mg microspheres that propel autonomously in natural water and obviate the need for external fuel, decontaminating reagent, or mechanical agitation. The activated TiO2/Au/Mg micromotors generate highly reactive oxygen species responsible for the efficient destruction of the cell membranes of the anthrax simulant Bacillus globigii spore, as well as rapid and complete in situ mineralization of the highly persistent organophosphate nerve agents into nonharmful products. The water-driven propulsion of the TiO2/Au/Mg micromotors facilitates efficient fluid transport and dispersion of the photogenerated reactive oxidative species and their interaction with the CBWA. Coupling of the photocatalytic surface of the micromotors and their autonomous water-driven propulsion thus leads to a reagent-free operation which holds a considerable promise for diverse "green" defense and environmental applications.

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          Environmental Applications of Semiconductor Photocatalysis

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            Photocatalysis on TiO2 Surfaces: Principles, Mechanisms, and Selected Results

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              Microrobots for minimally invasive medicine.

              Microrobots have the potential to revolutionize many aspects of medicine. These untethered, wirelessly controlled and powered devices will make existing therapeutic and diagnostic procedures less invasive and will enable new procedures never before possible. The aim of this review is threefold: first, to provide a comprehensive survey of the technological state of the art in medical microrobots; second, to explore the potential impact of medical microrobots and inspire future research in this field; and third, to provide a collection of valuable information and engineering tools for the design of medical microrobots.
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                Author and article information

                Journal
                ACS Nano
                ACS Nano
                American Chemical Society (ACS)
                1936-0851
                1936-086X
                November 25 2014
                October 10 2014
                November 25 2014
                : 8
                : 11
                : 11118-11125
                Affiliations
                [1 ]Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, United States
                Article
                10.1021/nn505029k
                25289459
                115b8319-8a92-4af5-936a-88bdb21b60f7
                © 2014
                History

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