Observation of crystallineC3N4
| Autor: | Eugene E. Haller, Marvin L. Cohen, William L. Hansen, I. C. Wu, Kin Man Yu, Amy Y. Liu |
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| Rok vydání: | 1994 |
| Předmět: | |
| Zdroj: | Physical Review B. 49:5034-5037 |
| ISSN: | 1095-3795 0163-1829 |
| DOI: | 10.1103/physrevb.49.5034 |
| Popis: | We present strong experimental evidence suggesting that we have synthesized the \ensuremath{\beta}-${\mathrm{C}}_{3}$${\mathrm{N}}_{4}$ phase. This is a material predicted by theory to have bulk moduli comparable to diamond. Thin films containing small crystals were deposited on Si and Ge wafers by rf diode sputtering of a pure graphite target with pure ${\mathrm{N}}_{2}$. The crystal structure of these phases was investigated using x-ray and electron-beam diffractometry as well as transmission electron microscopy. Our results indicate that the \ensuremath{\beta}-${\mathrm{C}}_{3}$${\mathrm{N}}_{4}$ particles with typical dimensions of \ensuremath{\sim}0.5 \ensuremath{\mu}m are embedded in a 1-\ensuremath{\mu}m-thick layer of a C-N polymer. These particles are believed to crystallize preferentially on Si (100) wafers. |
| Databáze: | OpenAIRE |
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