| Tartalom: |
http://real.mtak.hu/26203/ |
| Archívum: |
MTA Könyvtár |
| Gyűjtemény: |
Status = Published
Type = Article
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| Cím: |
Thermal conductivity of ultrathin nano-crystalline diamond films determined by Raman thermography assisted by silicon nanowires
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| Létrehozó: |
Anaya, J.
Rossi, S.
Alomari, M.
Kohn, E.
Toth, L.
Pécz, Béla
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| Dátum: |
2015
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| Téma: |
QC06 Physics of condensed matter / szilárdtestfizika
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| Tartalmi leírás: |
The thermal transport in polycrystalline diamond films near its nucleation region is still not well understood. Here, a steady-state technique to determine the thermal transport within the nano-crystalline diamond present at their nucleation site has been demonstrated. Taking advantage of silicon nanowires as surface temperature nano-sensors, and using Raman Thermography, the in-plane and cross-plane components of the thermal conductivity of ultra-thin diamond layers and their thermal barrier to the Si substrate were determined. Both components of the thermal conductivity of the nano-crystalline diamond were found to be well below the values of polycrystalline bulk diamond, with a cross-plane thermal conductivity larger than the in-plane thermal conductivity. Also a depth dependence of the lateral thermal conductivity through the diamond layer was determined. The results impact the design and integration of diamond for thermal management of AlGaN/GaN high power transistors and also show the usefulness of the nanowires as accurate nano-thermometers. (C) 2015 AIP Publishing LLC.
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| Típus: |
Article
PeerReviewed
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| Formátum: |
text
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| Azonosító: |
Anaya, J. and Rossi, S. and Alomari, M. and Kohn, E. and Toth, L. and Pécz, Béla (2015) Thermal conductivity of ultrathin nano-crystalline diamond films determined by Raman thermography assisted by silicon nanowires. APPLIED PHYSICS LETTERS, 106 (22). p. 223101. ISSN 0003-6951
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