一致的X射线光谱阐明了增强等离子体薄膜生长的纳米级动力学
Peco Myint1, Jeffrey M Woodward2, Chenyu Wang3
1X-ray Science Division, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, Illinois 60439, United States.
ACS nano
|January 9, 2024
概括
增强等离子体原子层沉积 (PE-ALD) 能够使低温薄膜生长. 实时X射线光子相关谱 (XPCS) 揭示了在化膜合成过程中纳米尺度的动态表面演变.
科学领域:
- 材料科学 材料科学 材料科学
- 表面科学是一门学科.
- 薄膜沉积的情况
背景情况:
- 增强等离子技术扩大了薄膜生长的加工窗口,特别是在低温下.
- 在X射线源的亮度的进步使得实时纳米级表面动力学研究.
研究的目的:
- 为了研究在等离子体增强原子层沉积 (PE-ALD) 的表轴性化薄膜的纳米级表面动力学.
- 了解前体和等离子反应物脉冲对膜形态演化的影响.
主要方法:
- 使用X射线光子相关谱 (XPCS) 进行实时分析.
- 用于用于超薄膜合成的等离子体增强原子层沉积 (PE-ALD).
- 通过交替的前体和等离子脉冲检查了自我限制的表面反应.
主要成果:
- 在最初的3D增长过程中观察到突然的表面结构变化,表明了减压事件.
- 在薄膜连续性上注意到突然过渡到长寿命的纳米级表面形态.
- 确定了一种与周期性增长和表面状态转变相关的重复相关性模式.
结论:
- 暴露于等离子体会在所有生长阶段推动显著的表面演变,而不仅仅是结结构.
- PE-ALD的循环性质涉及不同表面状态之间的动态过渡.
- PE-ALD提供了一种可调节的途径,用于控制表轴薄膜中的纳米尺度形态.
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