Deuterium isotope effects on iron core formation in ferritin |
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| Authors: | G. C. Papaefthymiou A. J. Viescas R. Horn E. Carney G. Zhao N. D. Chasteen J. Lee S. M. Gorun |
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| Affiliation: | (1) Department of Physics, Villanova University, Villanova, PA 19085, USA;(2) Department of Chemistry, University of New Hampshire, Durham, NH 03824, USA;(3) Department of Chemistry, Brown University, Providence, RI 02912, USA;(4) Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ 07102, USA |
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| Abstract: | We present comparative Mössbauer investigations of nanosized FeOOH and FeOOD biomineral phases nucleated within the 7-nm diameter cavity of horse-spleen apoferritin in order to assess deuterium isotopic effects on nanoscale, bioinorganic lattice structures with extended hydrogen bond networks. Differences in magnetic anisotropy energy, packing density and degree of crystallinity in the resulting iron oxo-hydroxide nanophases obtained via D2O (heavy water) vs. H2O (light water) solution chemistry are noted. These observations point to the possibility of stabilizing new thermodynamic states in the solid-state by utilizing isotope effects, with important implications for new synthetic pathways to novel nano materials. |
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| Keywords: | M?ssbauer ferritin deuteration heavy water superparamagnetism |
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