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Surface and volume characterization of TiO2 nanomaterials by 44Ti time differential perturbed angular correlation

Published/Copyright: June 9, 2011
Radiochimica Acta
From the journal Volume 100 Issue 2

Abstract

Various TiO2 nanomaterials with primary particle sizes well below 10 nm and TiO2 nanotubes with the anatase structure were studied via the nuclear quadrupole interaction (NQI) of44Ti(EC)44Sc by time differential perturbed angular correlation. In general two different NQIs were observed, the lower one attributed to the volume fraction because of the similarity to bulk values and the higher one to probes closest to the surface. Rather broad distributions of the strength of the interaction were observed which were different for nominally identical particles, contrary to the axial symmetry which is preserved to a very large extent. These distributions are interpreted as disorder arising from surface tension. These complications affect the interaction between these nanomaterials with biological systems and the environment and render toxicological assessments problematic. Dissolution studies in a synthetic body fluid mimicking blood plasma at 37 ºC for 4 weeks exhibited a very low solubility, but surprisingly slight changes in the volume fraction, probably due to surface adsorbates.

Keywords: TiO2 nanomaterials; 44Ti TDPAC; Nuclear quadrupole interaction
* Correspondence address: University of Leipzig, Faculty of Physics and Earth Sciences, Linnéstr. 5, 04103 Leipzig, Deutschland,
Published Online: 2011-06-09
Published in Print: 2012-02

© by Oldenbourg Wissenschaftsverlag, Leipzig, Germany

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  1. Preface
  2. Superheavy elements at GSI: a broad research program with element 114 in the focus of physics and chemistry
  3. Nuclear structure and reaction studies near doubly magic 270Hs
  4. Recent developments in nuclear data measurements and chemical separation methods in accelerator production of astatine and technetium radionuclides
  5. Radiotracers for SPECT imaging: current scenario and future prospects
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  7. Emergence and present status of Lu-177 in targeted radiotherapy: the Indian scenario
  8. Nuclear radioactive techniques applied to materials research
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  10. Surface and volume characterization of TiO2 nanomaterials by 44Ti time differential perturbed angular correlation
https://doi.org/10.1524/ract.2011.1844
Keywords for this article
TiO2 nanomaterials; 44Ti TDPAC; Nuclear quadrupole interaction

Articles in the same Issue

  1. Preface
  2. Superheavy elements at GSI: a broad research program with element 114 in the focus of physics and chemistry
  3. Nuclear structure and reaction studies near doubly magic 270Hs
  4. Recent developments in nuclear data measurements and chemical separation methods in accelerator production of astatine and technetium radionuclides
  5. Radiotracers for SPECT imaging: current scenario and future prospects
  6. Recoil and conversion electron considerations of the 166Dy/166Ho in vivo generator
  7. Emergence and present status of Lu-177 in targeted radiotherapy: the Indian scenario
  8. Nuclear radioactive techniques applied to materials research
  9. Applications of thin layer activation technique for the measurement of surface loss of materials: an Indian perspective
  10. Surface and volume characterization of TiO2 nanomaterials by 44Ti time differential perturbed angular correlation
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