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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
Porous materials
Particle beams
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. doi:10.1088/1742-6596/262/1/012040
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.
Gov't Doc #: 3335
ISSN: 1742-6588
Appears in Collections:Conference Publications

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