RBS analysis of the diffusion of nano-size spheres in a polymer matrix

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Rutherford Backscattering Spectrometry (RBS) with 1.5-MeV He ions was employed to measure the depth distribution of gold particles sandwitched between two poly(tert-butyl acrylate) layers following various isothermal annealing treatments; temperatures were kept below 170{degrees}C to prevent degradation of the polymer. Since PTBA also degrades when the ion beam impinges the sample, it was necessary to quantify the mass loss in order to obtain accurate diffusion coefficients. Although the total mass loss was substantial (40-60%), a simple expansion of the energy-to-depth scale was sufficient to account for the beam-induced shrinkage. This result is attributed to the fact that the mass loss ... continued below

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17 p.

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Cole, D.H.; Shull, K.R.; Rehn, L.E. & Baldo, P.M. August 1, 1997.

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  • Cole, D.H. Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering
  • Shull, K.R. Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering
  • Rehn, L.E.
  • Baldo, P.M. Argonne National Lab., IL (United States)

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Description

Rutherford Backscattering Spectrometry (RBS) with 1.5-MeV He ions was employed to measure the depth distribution of gold particles sandwitched between two poly(tert-butyl acrylate) layers following various isothermal annealing treatments; temperatures were kept below 170{degrees}C to prevent degradation of the polymer. Since PTBA also degrades when the ion beam impinges the sample, it was necessary to quantify the mass loss in order to obtain accurate diffusion coefficients. Although the total mass loss was substantial (40-60%), a simple expansion of the energy-to-depth scale was sufficient to account for the beam-induced shrinkage. This result is attributed to the fact that the mass loss occurs very rapidly, and is uniformly distributed through the depth of the sample. The data reveal that the diffusion of the nanometer-size gold particles is substantially slower than is predicted by a simple physical model (Stokes-Einstein) for noninteracting particles. This slowdown is attributed to polymer bridging interactions, in which polymer strands bind to individual metal particles, thereby retarding their diffusion.

Physical Description

17 p.

Notes

INIS; OSTI as DE97054141

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  • 13. international conference on ion beam analysis (IBA-13), Lisbon (Portugal), 27 Jul - 1 Aug 1997

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  • Other: DE97054141
  • Report No.: ANL/MSD/CP--92654
  • Report No.: CONF-970785--
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 565324
  • Archival Resource Key: ark:/67531/metadc694267

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • August 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Dec. 15, 2015, 11:58 a.m.

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Cole, D.H.; Shull, K.R.; Rehn, L.E. & Baldo, P.M. RBS analysis of the diffusion of nano-size spheres in a polymer matrix, article, August 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc694267/: accessed January 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.