NiO薄膜的结构,电和光学特性用于表面增强的拉曼光谱应用
Long Nguyen Hoang1,2, Le Huu Bao1,2, Tran Le1,2
1Vietnam National University Ho Chi Minh City Ho Chi Minh City 70000 Vietnam ltran@hcmus.edu.vn.
RSC advances
|May 26, 2025
概括
这项研究优化了氧化 (NiO) 薄膜的表面增强拉曼光谱 (SERS). 最好的电影,NiO-50,实现了9.6 × 10 8的纪录增强系数.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 表面科学是一门学科.
背景情况:
- 氧化 (NiO) 是一个有前途的半导体材料.
- 薄膜沉积技术对于定制材料特性至关重要.
- 表面增强拉曼光谱 (SERS) 需要高度活性基质.
研究的目的:
- 为了研究氧气度对NiO薄膜特性的影响.
- 为了优化 NiO 薄膜以提高 SERS 性能.
- 阐明在NiO膜中SERS增强背后的机制.
主要方法:
- 电流喷射沉积不同Ar/O2比率的NiO薄膜.
- 能量分散式X射线 (EDX) 用于元素分析和缺陷识别.
- 电气 (I-V测量) 和光学表征.
- 使用Rhodamine 6G作为探针分子进行SERS测量.
主要成果:
- 增加的氧气度导致了更高的Ni空缺和Ni3+离子.
- 电阻性下降,晶体质量随着O2含量增加而略有降低.
- -50薄膜显示了SERS的最佳结晶性,表面粗性和孔度.
- 对于NiO/Si.一个值得注意的SERS增强系数为9.6 × 108被实现了NiO/Si.
结论:
- 在喷过程中,可以通过控制氧度来调整NiO薄膜的特性.
- NiO-50表现出优异的SERS活性,由电子过渡机制驱动.
- 这些发现强调了NiO作为一种高度有效的SERS活性材料,用于先进的传感.
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