在紫外线辐射下分析石墨的电特性和晶体结构的变化
Jessica Paola Córdova-Fraga1, Estefanía Alejandra Hernández-Rangel1, Gonzalo Páez-Padilla2
1Physics Engineering Department, Division of Sciences and Engineering, Campus León, University of Guanajuato, Lomas del Bosque 103, León, 37150, Guanajuato, Mexico.
概括
这项研究揭示了石墨.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
背景情况:
- 石墨的六角结构与sp2和sp3杂交导致缺陷的产生/消灭.
- 这导致在各种辐射类型下的振荡行为.
研究的目的:
- 为了研究石墨对紫外线 (UV) 和电离辐射的反应.
- 分析辐射后拉曼强度和电性质的变化.
主要方法:
- 使用紫外线源 (1.12 mW, 2.7 mW) 和Elekta Linac (1-20 Gy) 对石墨棒 (2B和9B) 的辐射.
- 拉曼强度比 (ID/IG) 的分析.
- 使用紫外线源和电容器放电模型进行电气表征.
主要成果:
- 与紫外线和电离辐射观察到的振荡行为,独立于样品厚度.
- 紫外线照射的2B石墨显示出低度的反应;9B石墨显示出"色"的反应长达两周.
- 随着时间的推移,拉曼强度和电容在辐射后降低.
结论:
- 石墨的振荡行为在不同的辐射类型和厚度中是一致的.
- 9B石墨的"色"反应和依赖时间的拉曼强度和电容的减少是重要的发现.
- 介绍了低压响应和电容器放电的数学模型.
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