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Please use this identifier to cite or link to this item:
http://apo.ansto.gov.au/dspace/handle/10238/3167
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| Title: | Role of positron annihilation lifetime studies and nuclear sensors for characterising porous materials. |
| Authors: | Mume, E Uedono, A Mizunaga, G Lynch, DE Smith, SV |
| Keywords: | Positrons Annihilation Sensors Porous Materials Particle Beams Silica |
| Issue Date: | 1-Aug-2010 |
| Publisher: | Institute of Physics |
| Citation: | Mume, E., Uedono, A., Mizunaga, G., Lynch, D. E., Smith, S. V. (2010). Role of positron annihilation lifetime studies and nuclear sensors for characterising porous materials. 12th International Workshop on Slow Positron Beam Techniques for Solids, Surfaces, Atoms and Molecules (SLOPOS12), 1st - 6th August 2010. All Seasons Resort: Magnetic Island, North Queensland, Australia. In Journal of Physics: Conference Series, 262(1), 012040. |
| Abstract: | A series of nuclear sensors were designed to assess the chemistry within the nanopores of a porous material. The nuclear sensors of varying size, charge, and hydrophobicity were exposed to hollow silica shells (HSS) at varying pH. Uptake and release kinetics were studied over a 24 h period at room temperature. Preliminary study indicate positively charged nuclear sensors were selectively and rapidly (within 10 min) absorbed by the HSS at pH 7 to 9. PALS showed there were two types of pores (1.7 and 0.7 nm) present. The data suggest the nuclear sensors sit within the larger pore of the HSS. Both PALS and nuclear sensors are required to obtain an accurate insight into the nanoporosity of the hollow silica shells. |
| URI: | http://dx.doi.org/10.1088/1742-6596/262/1/012040 http://apo.ansto.gov.au/dspace/handle/10238/3167 |
| ISSN: | 1742-6588 |
| Appears in Collections: | Conference Publications |
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