| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
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| Outline of Final Research Achievements |
We have developed a laboratory-use X-ray fluorescence (XRF) spectrometer for studying the evolution of Liesegang bands in gels. The developed spectrometer has two types of operation mode: high-resolution mode and high-sensitivity mode. By using this spectrometer, we measured time-dependences of Mn/Fe/Co distributions of several aggregate patterns (including Liesegang bands) formed in water-glass gels, which were generated by reaction-diffusion processes of Mn2+/Fe3+/Co2+ and [Fe(CN)6]3-/[Fe(CN)6]4- ions. The obtained XRF results demonstrated that the turbid zones in gels mainly contained diffusive Prussian blue analogues (PBAs), and indicated that their metal distributions strongly depend on the preparation conditions. Additional XANES measurements of fully developed samples suggests that the combination of time-resolved XRF and position-dependent XANES is a powerful tool for analyzing the aggregate patterns stemming from the formation of PBAs.
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