| Project/Area Number |
24656576
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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 |
Energy engineering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Keywords | ナノ伝熱 / フォノニクス / フォノニック結晶 / 廃熱利用 / 熱工学 / マイクロ・ナノデバイス / 半導体超微細化 / 熱電変換 |
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| Research Abstract |
The objective of this research is investigation of the possibility of enhancement of the thermoelectric conversion efficiency of nanostructured Si, which has low environmental load. The key is control of phonon transport, which results in higher performance by reducing the thermal conductivity.
We challenged the artificial control of thermal conductivity on the basis of phononics. Formation technology of as small as 100-nm-period air-suspended Si nanostructure has been developed. A high through put and reliable time-domain micro thermoreflectance system for thermal conductivity measurements for micro/nano structures has been developed. We have succeeded in observing a characteristic ballistic phonon transport at room temperature in nanostructures and clear reduction in thermal conductivity in phononic crystal nanostructures compared with those in nanowires. This result shows that this structure is useful for thermal conduction engineering.
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