2022 Fiscal Year Final Research Report
Development of multiple thermodynamic measurements using imaging techniques
| Project/Area Number |
19K22169
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 32:Physical chemistry, functional solid state chemistry, and related fields
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| Research Institution | Osaka University |
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Principal Investigator |
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| Project Period (FY) |
2019-06-28 – 2023-03-31
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| Keywords | 赤外線イメージング / 微小試料 / 熱容量 / 熱伝導 |
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| Outline of Final Research Achievements |
In this project, we developed a comprehensive thermal measurement of micro single crystals of molecular materials using infrared imaging technique, which can be used as a non-contact temperature measurement. We constructed a micro-chip relaxation calorimetry cell and an ultra-small container for an adiabatic-type cell of which surface is coated by black color to suppress reflections. Ultra-thin chromel wires (13 micro m outer diameter) were used as a lead wire to minimize the heat flow from the heat bath into the cell. These cells were placed in a new vacuum chamber with a Ge window for observation by an infrared camera, and heat capacity measurements using imaging data were proceeded by comparing direct thermometer measurements and imaging data. In addition, the process of temperature change was also measured in multi-data including temperature distributions at various positions on the cells to investigate the reliability of the thermal measurement.
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| Free Research Field |
物性熱力学
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| Academic Significance and Societal Importance of the Research Achievements |
熱的な考察は、新物質の性質の理解や、新物性の発現のためのスタート地点を与える。複雑な組成をもつ分子や原子の多成分系である各種の新材料、ナノ構造体では合成条件の問題もあり極微量試料しか得られないことが多い。本研究で、おこなった非接触法を用いて、10-100μg程度の極微単結晶を対象に、多角的な熱測定をこれまで測定が困難な多くの物質の熱計測を可能にし、熱力学的な議論を行うために重要なステップになる。熱測定の汎用化、ダウンサイズ化、高精度化は新物質開発、材料開発と並行して常に求められるものであり、本研究は、その展開に大きな波及効果を与える。
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