Quantitative measurement of the thermal contact resistance between a glass microsphere and a plate
| Autor: | Nancy Rahbany, Yannick De Wilde, Alix Dodu, Valentina Krachmalnicoff, Elodie Perros, W. Poirier, Joris Doumouro, Rémi Carminati, Dominique Leprat |
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| Přispěvatelé: | Institut Langevin - Ondes et Images (UMR7587) (IL), Sorbonne Université (SU)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Paris (UP)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2020 |
| Předmět: |
Thermal contact conductance
Physics Condensed Matter - Materials Science Thermal resistance Contact resistance General Physics and Astronomy Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology Conductivity 021001 nanoscience & nanotechnology Coupling (probability) 01 natural sciences [SPI.MAT]Engineering Sciences [physics]/Materials Amplitude Temperature jump 0103 physical sciences Thermal Atomic physics [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat] 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review Applied Physical Review Applied, American Physical Society, 2021, 15 (1), ⟨10.1103/PhysRevApplied.15.014063⟩ |
| ISSN: | 2331-7019 |
| DOI: | 10.48550/arxiv.2012.04291 |
| Popis: | Accurate measurements of the thermal resistance between micro-objects made of insulating materials are complex because of their small size, low conductivity, and the presence of various ill-defined gaps. We address this issue using a modified scanning thermal microscope operating in vacuum and in air. The sphere-plate geometry is considered. Under controlled heating power, we measure the temperature on top of a glass microsphere glued to the probe as it approaches a glass plate at room temperature with nanometer accuracy. In vacuum, a jump is observed at contact. From this jump in temperature and the modeling of the thermal resistance of a sphere, the sphere-plate contact resistance $ R_K=(1.4 \pm 0.18)\times10^7 \ \mathrm{K.W^{-1}}$ and effective radius $r=(36 \pm 4)$ nm are obtained. In air, the temperature on top of the sphere shows a decrease starting from a sphere-plate distance of 200 $\mathrm{\mu m}$. A jump is also observed at contact, with a reduced amplitude. The sphere-plate coupling out of contact can be described by the resistance shape factor of a sphere in front of a plate in air, placed in a circuit involving a series and a parallel resistance that are determined by fitting the approach curve. The contact resistance in air $R^*_K=(1.2 \pm 0.46)\times 10^7 \ \mathrm{K.W^{-1}}$ is then estimated from the temperature jump. The method is quantitative without requiring any tedious multiple-scale numerical simulation, and is versatile to describe the coupling between micro-objects from large distances to contact in various environments. Comment: 8 pages, 4 figures |
| Databáze: | OpenAIRE |
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