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相关概念视频

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

532
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...
532
Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

600
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...
600

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Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy
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化学传感作为一种使用并行分布式扫描源的实用工具,使用拉曼光谱学.

Nili Persits, Dahlia L Dry, Jaehwan Kim

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    这项研究引入了使用光纤的分布式拉曼光谱网络,使得可扩展的远程分子分析成为可能. 这种新的方法提高了工业和环境监测的可访问性和资源共享.

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    科学领域:

    • 分析化学 分析化学
    • 频谱学是一种光谱学.
    • 生物技术是生物技术.

    背景情况:

    • 目前的分子分析方法缺乏可访问性和可扩展性.
    • 现有的方法包括样品运输或孤立分析仪.
    • 现代基础设施需要更加集成和分布式的传感解决方案.

    研究的目的:

    • 开发一种新的并行,分布式光纤扫描源拉曼光谱方法.
    • 创建一个可扩展的远程拉曼传感器网络.
    • 证明网络在工业和环境监测中的实用性.

    主要方法:

    • 使用了紧的半导体可调节激光器和高收集功率光纤探头.
    • 集成敏感的单光子雪崩探测器 (SPAD).
    • 在16个位置 (100米距离) 部署了拉曼传感器网络,共享激光等资源,并利用现有的光纤.

    主要成果:

    • 实现了分布式拉曼传感器的可扩展网络.
    • 纤维探测器显示光采集功率比台式光谱仪高12倍.
    • 成功监测了单克隆抗体生产和肥水平.

    结论:

    • 开发的分布式拉曼光谱网络提供了更好的可访问性和可扩展性.
    • 这种方法很好地与现有的资源共享基础设施相结合.
    • 该系统对实时工业和环境监测应用非常有效.