https://scholars.lib.ntu.edu.tw/handle/123456789/177705
標題: | Laboratory investigation of hydrogenated diamond surfaces: Implications for the formation and size of interstellar nanodiamonds | 作者: | Sheu, S.Y. Lee, I.P. Lee, Y.T. Chang, H.C. |
公開日期: | 10-十二月-2002 | 起(迄)頁: | - | 來源出版物: | The Astrophysical Journal 581,L55–L58 | 摘要: | The formation & size of interstellar diamonds have been investigated by infrared spectroscopy in the laboratory. Employing hot-filament chemical vapor deposition (CVD) to synthesize the interstellar analogs, we successfully reproduced the infrared emission bands of nanodiamonds around HD 97048 & Elias 1. Analysis of the infrared absorption spectra of synthetic diamond crystallites (25–700 nm) from a commercial source reveals a strong size-dependent effect. The 3.53 mm feature emerges only for particles larger than 25 nm. Our experiments suggest that the carriers of the anomalous infrared emission bands at 3.43 & 3.53 mm could be nanodiamonds that are larger than 25 nm & are formed by a CVD-like process. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/2006111501221963 | 其他識別: | 246246/2006111501221963 | DOI: | 10.1086/345519 |
顯示於: | 化學系 |
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