| Autor: |
Mondal, Trisha, Tripathi, Ajay, Tiwari, Archana, Zhang, Jinying, Shripathi, Thoudinja, Shinohara, Hisanori |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 2018, Vol. 124 Issue 19, pN.PAG-N.PAG, 7p, 2 Charts, 7 Graphs |
| Abstrakt: |
We present temperature, laser power, and pressure dependent Raman spectral analysis of C 60 oxide (C 60 O) thin films prepared by the photolysis method. The first order temperature, laser power, and pressure coefficients of the Raman frequencies are evaluated and are utilized for evaluating the thermal conductivity of C 60 O. Its thermal conductivity is found to be 0.7 W m − 1 K − 1 which is marginally higher than that of bulk C 60. Raman frequencies corresponding to C–O and C–C bonds blueshift with a decrease in temperature which is attributed to the thermal contraction of C 60 O molecules. The density functional measurements have been performed to optimize C 60 O structure. The contraction in the C–O bond length has been corroborated with the experimental Raman shifts at different temperatures and is used to evaluate the linear expansion coefficient of C 60 O. Pressure induced compression and polymerization of C 60 O clusters are also illustrated. This study highlights the interplay between thermal and mechanical transformations in the C 60 O cluster which may regulate its thermoelectric properties by tuning the intermolecular interactions. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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