News Column

Recent Findings in General Science Described by Researchers from University of California

May 30, 2014

By a News Reporter-Staff News Editor at Science Letter -- Investigators publish new report on Science. According to news reporting out of Davis, California, by NewsRx editors, research stated, "Chemisorption of water onto anhydrous nanophase manganese oxide surfaces promotes rapidly reversible redox phase changes as confirmed by calorimetry, X-ray diffraction, and titration for manganese average oxidation state. Surface reduction of bixbyite (Mn2O3) to hausmannite (Mn3O4) occurs in nanoparticles under conditions where no such reactions are seen or expected on grounds of bulk thermodynamics in coarse- grained materials."

Our news journalists obtained a quote from the research from the University of California, "Additionally, transformation does not occur on nanosurfaces passivated by at least 2% coverage of what is likely an amorphous manganese oxide layer. The transformation is due to thermodynamic control arising from differences in surface energies of the two phases (Mn2O3 and Mn3O4) under wet and dry conditions."

According to the news editors, the research concluded: "Such reversible and rapid transformation near room temperature may affect the behavior of manganese oxides in technological applications and in geologic and environmental settings."

For more information on this research see: Rapidly reversible redox transformation in nanophase manganese oxides at room temperature triggered by changes in hydration. Proceedings of the National Academy of Sciences of the United States of America, 2014;111(17):6209-6214. Proceedings of the National Academy of Sciences of the United States of America can be contacted at: Natl Acad Sciences, 2101 Constitution Ave NW, Washington, DC 20418, USA. (National Academy of Sciences -; Proceedings of the National Academy of Sciences of the United States of America -

Our news journalists report that additional information may be obtained by contacting N. Birkner, University of California, Nanomat Environm Agr & Technol Organized Res Unit, Davis, CA 95616, United States (see also Science).

Keywords for this news article include: Davis, Science, California, United States, North and Central America

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Source: Science Letter

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