通过组合光热异极成像和拉曼测量来研究等离子体在电纤维中的作用
Yechan Moon1, Susan V Olesik1, Zachary D Schultz1
1Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States.
概括
聚合物纤维内的等离子纳米粒子中的局部表面等离子子共振 (LSPR) 驱动热电子转移,这是一个温度依赖的过程,对于传感和能量转换的应用至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 物理化学 物理化学
背景情况:
- 等离子纳米粒子增强电聚合物纤维的性能,用于传感,催化和能源应用.
- 了解热电子转移机制是优化这些材料的关键.
研究的目的:
- 为了研究含有金和银纳米粒子的多烯 (PAN) 薄膜和纳米纤维中的热电子转移机制.
- 确定局部表面等离子体共振 (LSPR) 激发在这个过程中的作用.
主要方法:
- 在光热异构成像系统中使用拉曼光谱仪.
- 在PAN薄膜和纳米纤维中研究金和银纳米粒子.
- 采用纳米粒子作为温度控制器.
主要成果:
- PAN的电离,以离子亚基和中性亚基的比率来衡量,遵循了博尔兹曼分布.
- 这表明LSPR介导的热电子转移取决于温度.
- 仅加热,没有LSPR,不足以电离PAN.
结论:
- 从等离子纳米粒子到电聚合物中的热电子转移是一个温度依赖的现象.
- 激发LSPR对于启动这种电子转移至关重要.
- 研究结果为高级应用的聚合物纤维中纳米粒子添加剂提供了洞察力.
相关概念视频
01:20Raman Spectroscopy: Overview
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The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
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01:26Raman Spectroscopy Instrumentation: Overview
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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
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