Depth Profiling Of Small Molecule Ingress Into Planar and Cylindrical Materials Using NRA and PIXE

Journal Article · Tue Aug 26 00:00:00 EDT 2003 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1619763· OSTI ID:20632624

Smith, Richard W; Massingham, Gary; Clough, Anthony S ^[1]

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1. Department of Physics, University of Surrey, Guildford, Surrey, GU2 7XH (United Kingdom)

The use of a 3He ion micro-beam technique to study the ingress/diffusion of water into a planar fibre optic grade glass and a cylindrical drug-release polymer is described. One-dimensional concentration profiles showing the depth of water ingress were produced. The depth of penetration of water into the glass was measured by fitting a gaussian function to the concentration profile. The ingress of water into the drug-release polymer was found to be Fickian and a cylindrical diffusion model used to obtain a diffusion coefficient.

• OSTI ID: 20632624
• Journal Information: AIP Conference Proceedings, Vol. 680, Issue 1; Conference: 17. international conference on the application of accelerators in research and industry, Denton, TX (United States), 12-16 Nov 2002; Other Information: DOI: 10.1063/1.1619763; (c) 2003 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CYLINDRICAL CONFIGURATION
DEPTH
DIFFUSION
GAUSS FUNCTION
HELIUM 3
ION BEAMS
NUCLEAR REACTION ANALYSIS
OPTICAL FIBERS
PIXE ANALYSIS
POLYMERS
SPATIAL DISTRIBUTION
WATER
WATER CHEMISTRY