2021 Fiscal Year Final Research Report
Investigation of minute thermo-tag using magneto-thermal phenomena under unsteady electric field
| Project/Area Number |
20K20982
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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 20:Mechanical dynamics, robotics, and related fields
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
川原 知洋 九州工業大学, 大学院生命体工学研究科, 准教授 (20575162)
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| Project Period (FY) |
2020-07-30 – 2022-03-31
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| Keywords | タグ / マイクロナノ工学 / 磁性 / センサ / 生体組織 |
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| Outline of Final Research Achievements |
This research developed an identification method using magnetism for small living bodies, and proposed an identification system using thermography for the purpose of establishing a system to quickly read information on tags, and conducted basic experiments. A heating demonstration experiment was conducted on the assumption of a printed type, and heat generation in liquid was attempted. The factors influencing the heat generation were decomposed into the factors of magnetic field strength, particle size, frequency, particle composition, dispersion, and concentration, and by improving the power supply, coil, and heated sample that govern each parameter, temperature changes of as much as 15 °C/min were achieved in a magnetic fluid sample. Heat generation was observed for samples dried on a substrate, indicating that Neel relaxation occurs with particles fixed in place, even when agglomerated.
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| Free Research Field |
マイクロナノ工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究の挑戦的研究としての意義は超常磁性ナノ粒子の高周波磁場による発熱原理の一つであるネール緩和に着目し磁気モーメントの磁化遅れにより発熱する現象を利用したまったく新しいサーモタグを確立することにある．この原理の実用化の社会へのインパクトは大きくRFIDタグの市場を凌駕する，新しい微小なタグの誕生が見込まれるものである．特にネール緩和に着目し磁気モーメントの磁化遅れにより発熱する現象は微小な数nm～数十nmのサイズの磁性粒子にしか見られない特異な現象であり，センシングにおける空間分解能の向上が見込まれる．
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