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Novel Ferromagnetic Aerogel Composite Materials with Nanoparticles Formation and Chemistry in Response to Light

Published online by Cambridge University Press:  01 February 2011

Chunhua Yao ,
Xipeng Liu  and
William M. Risen Jr.
Chunhua Yao
Affiliation:
Chunhua_Yao@Brown.edu, Brown University, Chemistry, United States
Xipeng Liu
Affiliation:
xipeng_Liu@brown.edu, Brown University, Chemistry, United States
William M. Risen Jr.
Affiliation:
wrisen@brown.edu, Brown University, Chemistry, United States
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Abstract

Smart composites based on ferromagnetic hybrid aerogels have been prepared. These novel materials change chemistry in response to light to form nanoparticles that react with compounds that are present in the environment of the aerogels. Thus, high surface area silica/functional polymer hybrid aerogels have been formed via sol-gel synthesis. They also can contain coordinated metal-ion species. They are reacted with Fe-precursors to form air stable ferromagnetic aerogels, which they are transformed into active particles themselves or by incorporation of additional metal ions. These active materials, which adhere to tissue, can be positioned magnetically within their environment. Once they are positioned, they can be transformed by UV light to form Au(0) nanoparticles which react with the molecules in their environment. The preparation and properties of these aerogels, their photochemistry and reaction with bio-molecules will be presented.

Keywords

aerogelcompositeferromagnetic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 888: Symposium V – Materials and Devices for Smart Systems II , 2005 , 0888-V05-07
Copyright
Copyright © Materials Research Society 2006

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References

REFERENCE

1. Campo, A., Sen, T., Lellouche, J. P.. Bruce, I. J., Journal of magnetism and magnetic materials 293 (2005) 33–41 Google Scholar
2. Deng, Y., Wang, C., Hu, J., Yang, W. and Fu, S., Colloids and surfaces A: Physichem. Eng. Aspects 262(2005) 87–93 Google Scholar
3. Jung, J., Choi, K., Jung, Y., Lee, S., Golub, V., Malkinski, L., O'Connor, C., Journal of magnetism and magnetic materials 272–276(2004) e1157–e1159Google Scholar
4. Bomati-Migunel, O., Leconte, Y., Morales, M., Herlin-Boime, N. and Veintemillas Verdaguer, S., Journal of magnetism and magnetic materials 290–291 (2005) 272–275 Google Scholar
5. Casas, L., Roig, A., Molins, E., Greneche, J., Asenjo, J. and Tejada, J., App. Phys. A 74, 591–597(2002)Google Scholar
6. Giri, S., Trewyn, B., Stellmaker, M. and Lin, V., Angew. Chem. Int. Ed 2005, 44, 5038–5044 Google Scholar
7. Liu, X., Zhu, Y., Yao, C. and Risen, W. M. Jr, Mat. Res. Soc. Symp. Proc. Vol 788, L2.1.1 (2003)Google Scholar
8. Hu, X., Littrell, K., Ji, S., Pickles, D. and Risen, W. M. Jr, J. Non-cryst. Solids 288 184(2001)Google Scholar
9. Yao, C. and Risen, W. M. Jr, J. Mat. Res. Soc. Symp. Proc Vol 847, 515–520 (2004)Google Scholar
10. Caizer, C. and Hrianca, I., Ann. Phys. (Leipzig) 12, No, 1–2, 115–122 (2003)Google Scholar
11. Long, J. W., Logan, M., Rhodes, C. P., Carpeter, E., Stroud, R. and Rolison, D., J. Am. Chem. Soc. 2004, 126, 16879–16889 Google Scholar