| 激光法合成纳米金刚石的高分辨电镜研究 |
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| 引用本文： | 孙景,雷贻文,翟琪,杨星,杨晶,杜希文. 激光法合成纳米金刚石的高分辨电镜研究[J]. 纳米技术与精密工程, 2005, 3(3): 181-184 |
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| 作者姓名： | 孙景 雷贻文 翟琪 杨星 杨晶 杜希文 |
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| 作者单位： | 天津大学材料科学与工程学院,天津,300072;天津大学材料科学与工程学院,天津,300072;天津大学材料科学与工程学院,天津,300072;天津大学材料科学与工程学院,天津,300072;天津大学材料科学与工程学院,天津,300072;天津大学材料科学与工程学院,天津,300072 |
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| 基金项目： | Supported by Tianjin Science and Technology Committee（043101211 ）; Supported by the National Natural Science Foundation of China（50372043 ）. |
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| 摘 要： | 在常温常压下,采用脉冲激光作用循环的石墨悬浮液,收集并烘干得到样品B,另一部分用高氯酸进行酸煮提纯提到样品A.对样品A、B分别进行高分辨电子显微镜（HRTEM）和显微拉曼光谱（Micro-Raman）分析.结果表明,部分石墨经激光作用后转变成了具有多重孪晶结构特征的、尺寸为5 nm的金刚石颗粒,同时还得到了非晶碳.高分辨电子显微镜照片证明,石墨转变成纳米金刚石的机理为快速成核长大过程.
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| 关 键 词： | 金刚石 脉冲激光 石墨 辐射 |
| 文章编号： | 1672-6030（2005）03-0181-04 |
| 收稿时间： | 2005-04-09 |
| 修稿时间： | 2005-04-09 |
High Resolution Transmission Electron Study of Nanocrystalline Diamonds Prepared by Laser Irradiation |
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| SUN Jing,LEI Yi-wen,ZHAI Qi,YANG Xing,YANG Jing,DU Xi-wen. High Resolution Transmission Electron Study of Nanocrystalline Diamonds Prepared by Laser Irradiation[J]. Nanotechnology and Precision Engineering, 2005, 3(3): 181-184 |
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| Authors: | SUN Jing LEI Yi-wen ZHAI Qi YANG Xing YANG Jing DU Xi-wen |
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| Abstract: | The cycled graphite suspension was irradiated by pulsed laser under atmosphere pressure and room temperature. The collected product was enriched by boiling in perchloric acid. Samples before (sample B) and after (sample A) oxidation by perchloric acid were investigated with the high resoluation transmission electron microscopy (HRTEM ) and micro-Raman spectroscopy. The results suggest that diamond particles with multiple twins' structure be synthesized and the particles size be about 5 nm in sample A. Other part of graphite converted into amorphous carbon. The HRTEM images of the samples also indicate that the mechanism of nanocrystalline diamonds synthesis is a raplid nucleation and growth process. |
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| Keywords: | diamond pulsed laser graphite irradiation |
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