Skip to main content Accessibility help

f-Element Influence on the Size of Nanophase Phosphate Inclusions in Silica

  • James V. Beitz (a1), S. Skanthakumar (a1), S. Seifert (a2) and P. Thiyagarajan (a3)


Insight into the factors that control the formation and size of heavy metal phosphate nanophases in vitreous silica has been gained by combining conventional and anomalous small angle x-ray scattering studies with powder x-ray diffraction and laser-induced fluorescence investigations. Europium, thorium, and uranyl ions were sorbed from aqueous solutions into a chemically functionalized porous silica (termed Diphosil). Aliquots of those samples were heated to a series of temperatures that spanned the pore collapse point. Loading with trivalent europium ions resulted in production of nanophases whose size corresponded to the average number of metal ions per pore. Thorium or uranyl ions resulted in retention of porosity to higher temperature with eventual pore collapse that evidently resulted in formation of nanophases whose size exceeded that determinable under the experimental conditions.



Hide All
1. Hebbink, G. A., Stouwdam, J. W., Reinhoudt, D. N., and Van Veggel, F. C. J. M, Adv. Materials 14, 1147 (2002)
Williams, G. R., Bayram, S. B., Rand, S. C., Hinklin, T., and Laine, R. M., Phys. Rev. A 65, 013807 (2002).
2. Lu, C.-H. and Jagannathan, R., Appl. Phys. Let. 80, 3608 (2002).
3. Beitz, J. V. and Williams, C. W., Solv. Extr. Ion Exch. 19, 699 (2001).
4. Chiarizia, R., Horwitz, E. P., D'Arcy, K. A., Alexandratos, S. D., and Trochimczuk, A. W., Solv. Extr. Ion Exch. 14, 1077 (1996).
5. Seifert, S., Winans, R. W., Tiede, D. M., and Thiyagarajan, P., J. Appl. Cryst. 33, 782 (2000).
6. Mullica, D. F., Grossie, D. A., Boatner, L. A., L. A., , Inorg. Chim. Acta 109, 105 (1985).
7. Guinier, A. and Gournet, G., Small-Angle Scattering of X-Rays (John Wiley & Sons, New York, 1955).
8. Brinker, C. J. and Scherer, G. W., Sol-gel Science: The Physics and Chemistry of Sol-gel Processing (Academic Press, Boston, 1990).
9. Waseda, Y., Anomalous X-ray Scattering for Materials Characterization (Springer-Verlag, Berlin, 2002).
10. Benard, P., Brandel, V., Dacheux, N., Jaulmes, S., Launay, S., Lindecker, C., Genet, M., Louer, D., and Quarton, M., Chem. Mater. 8, 181 (1996).
11. Benard, P., Louer, D., Dacheux, N., Brandel, V., Genet, M., Chem. Mater. 6, 1049 (1994).
12. Barten, H. and Cordfunke, E. H. P., Thermochim. Acta 40, 357 (1980).

Related content

Powered by UNSILO

f-Element Influence on the Size of Nanophase Phosphate Inclusions in Silica

  • James V. Beitz (a1), S. Skanthakumar (a1), S. Seifert (a2) and P. Thiyagarajan (a3)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.