2013 Fiscal Year Final Research Report
Observation of instant process at phase change
| Project/Area Number |
24655003
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Physical chemistry
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| Research Institution | Chiba University |
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Principal Investigator |
NISHIKAWA KEIKO 千葉大学, 融合科学研究科(研究院), 教授 (60080470)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 相変化 / イオン液体 / ナノ粒子 / ソフト化 / ダイナミクス / 超高感度熱測定 / NMR / 緩和時間 |
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| Research Abstract |
The aim of this study is to observe kaleidoscopic process of phase changes. To achieve this, the following themes were performed; (a) to find many sample systems, which are characterized by slow phase changes, and (b) to construct methodologies and apparatuses to detect details.
As for (a), it was shown that the phase changes of ionic liquids (ILs) and the growing process of Au nanoparticles are adequate systems. For ILs, unique phenomena accompanied with the phase changes were observed by calorimetoric and Raman scattering experiments, and measurements of relaxation times of NMR. The growth of Au nanoparticles was studied using a time-resolved small-angle X-ray scattering method.
As an example of (b), construction of the NMR probe for 19F is taken. This made it possible to detect the dynamics of F atoms, one of the most common kinds of atom in anions for ILs. By relating 1H and 19F dynamics, we can discuss comprehensively the cation and anion dynamics of ILs.
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