低温原子层沉积的 (00l) 导向元素木
Jorge Luis Vazquez-Arce1, Alessio Amoroso1,2, Nicolas Perez1
1Leibniz-Institute for Solid State and Materials Research Dresden, Helmholtzstraße 20, 01069, Dresden, Germany.
Angewandte Chemie (International ed. in English)
|January 28, 2025
概括
研究人员开发了一种新方法,使用100°C的原子层沉积 (ALD) 来种植 bismuth (Bi) 薄膜. 这种技术可以精确控制高级应用的薄膜生长和特性.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 薄膜沉积的情况
背景情况:
- 原子层沉积 (ALD) 是制造具有原子级精度的薄膜的关键技术.
- 元素 (Bi) 薄膜具有独特的电子和光学特性,但它们通过ALD进行合成是具有挑战性的.
研究的目的:
- 通过热原子层沉积,展示了第一个元素木薄膜的成功生长.
- 研究ALD培养的Bi膜的生长机制,形态,结构和电气特性.
主要方法:
- 热原子层沉积 (ALD) 使用比斯前体Bi(NMe2) 3和协同反应物Sb(SiMe3) 3.3.
- 在100°C下沉积,每周期增长率 (GPC) 为0.31-0.34 Å/周期.
- 使用X射线衍射 (XRD),X射线光辐射光谱学 (XPS) 和取决于温度的板材阻力测量进行了表征.
主要成果:
- 在2000到2500个ALD周期之间实现了全面覆盖.
- 观察到谷物膨胀和增长方向的偏好转移,从 (012) 到 (003) 平面,厚度增加.
- 证实金属Bi通过XPS氧化最小,并证明半金属行为,室温电阻率为~200μΩcm.
结论:
- 成功建立了一个热ALD工艺,用于生长高质量的元素木薄膜.
- 通过ALD培养的Bi薄膜表现出可控的生长,可取的结构特征和半金属性质,具有温度依赖的载体优势.
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