在电子束诱导的金沉积过程中用水辅助的净化
Cristiano Glessi1, Fabian A Polman1, Cornelis W Hagen1
1Delft University of Technology, Fac. Applied Sciences, Dept. Imaging Physics, Lorentzweg 1, 2628CJ Delft, Netherlands.
Beilstein journal of nanotechnology
|July 30, 2024
概括
研究人员开发了一种使用聚焦电子束诱导沉积 (FEBID) 与水共注射制造纯金属纳米结构的新方法. 这种技术成功地净化了黄金和金矿床,大大减少了碳杂质.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 表面化学 表面化学
背景情况:
- 聚焦电子束诱导沉积 (FEBID) 是直接制造纳米结构的关键技术.
- 在FEBID矿床中实现高纯度,特别是黄金和金等金属,仍然是一个挑战.
- 之前的研究表明,使用含有Au(tfac) Me2.2的水前体,成功净化了黄金.
研究的目的:
- 通过FEBID使用替代前体制造的金属纳米结构净化水联合注射的有效性.
- 为了评估使用Au(acac) Me2净化黄金和使用MeCpPtMe3净化金与MgSO4·7H2O水前体.
- 评估这种净化方法在标准扫描电子显微镜 (SEM) 设置中应用的可行性.
主要方法:
- 聚焦电子束诱导沉积 (FEBID) 与水前体 (MgSO4·7H2O) 的联合注入.
- 使用的黄金前体Au ((acac) Me2和金前体MeCpPtMe3.3.
- 在标准扫描电子显微镜 (SEM) 中进行沉积和净化.
- 通过使用能量分散式X射线光谱 (EDS) 或类似的元素分析技术测量碳与金属的比率来分析沉积物的纯度.
主要成果:
- 证明了用Au(acac) Me2制造的黄金纳米结构的成功净化,将碳与黄金的比率从2.8降至0.5.5.
- 使用MeCpPtMe3制造的纳米结构实现了显著的净化,使碳与的比率从6-7降至0.2.2.
- 确认净化过程是有效的,通常可用的前体和设备.
结论:
- 在FEBID过程中共同注入水是直接制造高纯度黄金和纳米结构的有效方法.
- 使用MgSO4·7H2O作为水的前体,与Au(acac) Me2和MeCpPtMe3一起,为减少碳污染提供了一个可行的途径.
- 这种直接蚀刻辅助的FEBID方法与标准的SEM兼容,使得生产纯金属纳米结构的可访问性更广泛.
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