Electron Small Polarons and Their Mobility in Iron (Oxyhydr)oxide Nanoparticles
| Autor: | Jordan E. Katz, Xiaoyi Zhang, Klaus Attenkofer, Karena W. Chapman, Cathrine Frandsen, Piotr Zarzycki, Kevin M. Rosso, Roger W. Falcone, Glenn A. Waychunas, Benjamin Gilbert |
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| Rok vydání: | 2012 |
| Předmět: |
Multidisciplinary
Materials science Inorganic chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Redox 0104 chemical sciences Metal visual_art visual_art.visual_art_medium Reactivity (chemistry) Time-resolved spectroscopy 0210 nano-technology |
| Zdroj: | Science |
| ISSN: | 0036-8075 0016-7037 1520-5851 1089-7690 0021-8987 1520-5126 1079-7114 1948-7185 0342-1791 1476-4687 1520-6890 0066-426X 0010-8545 1089-5639 1047-8477 1520-5207 0003-004X 1520-5827 1520-5215 0009-8558 1095-7103 0040-6090 0953-8984 0021-8898 |
| DOI: | 10.1126/science.1223598 |
| Popis: | Iron Hopping Iron oxide minerals shuttle electrons around in a wide range of biogeochemical processes. Katz et al. (p. 1200 ) used time-resolved x-ray absorption spectroscopy to take a closer look at how this happens. By using photoionized surface dyes to inject electrons into three different solid oxide phases, they found that electrons hop among iron centers at rates that depend more on structure in their immediate vicinity than on the extended ordering of the crystal lattice. These observations bolster the prevailing small polaron model in which charge carriers associate closely with individual metal sites. |
| Databáze: | OpenAIRE |
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