Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Infrared (IR) Spectroscopy: Overview01:09

Infrared (IR) Spectroscopy: Overview

2.3K
When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
2.3K
IR Spectrometers01:25

IR Spectrometers

1.5K
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
1.5K
IR Spectroscopy: Molecular Vibration Overview01:24

IR Spectroscopy: Molecular Vibration Overview

2.8K
When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
2.8K
IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration01:16

IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration

1.7K
A covalently bonded heteronuclear diatomic molecule can be modeled as two vibrating masses connected by a spring. The vibrational frequency of the bond can be expressed using an equation derived from Hooke's law, which describes how the force applied to stretch or compress a spring is proportional to the displacement of the spring. In this case, the atoms behave like masses, and the bond acts like a spring.
According to Hooke's law, the vibrational frequency is directly proportional to...
1.7K
Applications of IR Spectroscopy: Overview01:11

Applications of IR Spectroscopy: Overview

1.1K
The non-destructive nature and ability to provide valuable chemical information make IR spectroscopy a versatile technique with broad applications in various scientific and industrial fields. IR spectroscopy is commonly used to identify and characterize organic and inorganic compounds. It provides information about the functional groups present in a molecule and the bonding between atoms. This helps in the structural elucidation of compounds during organic synthesis, pharmaceutical research,...
1.1K
IR Spectrum01:19

IR Spectrum

1.3K
When infrared (IR) radiation passes through a molecule, the bonds stretch or bend by absorbing the radiation. This absorption creates the molecule's absorption spectrum, which is the plot of its percentage transmittance versus wavenumber.
Transmittance is defined as the ratio of the radiant power passing through a sample to that from the radiation's source. Multiplying the transmittance by 100 gives the percent transmittance (%T), which varies between 100% (no absorption) and 0%...
1.3K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Dehydration-driven organization of metabolites into NaDES-like assemblies in orthodox seeds.

The New phytologist·2026
Same author

Cluster-based DFT modeling of Raman vibrations in tetrahedral GeS<sub>2</sub> and GeSe<sub>2</sub> amorphous chalcogenides.

Scientific reports·2026
Same author

Brillouin-Mandelstam scattering-based cooling of traveling acoustic waves from cryogenic temperatures.

Optics letters·2025
Same author

Multimaterial Fibers Interfaced with ZnO for Photoelectrochemical Detection.

Small science·2025
Same author

High-Q aluminum oxide microring resonators operating at 460 nm.

Optics express·2025
Same author

Polymer-Based Microstructured Photonic Membrane for Passive Heating Textiles.

ACS omega·2025

相关实验视频

Updated: Sep 11, 2025

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
10:42

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Published on: March 22, 2019

6.3K

液体和气体中红外集成光谱传感器

Sofiane Meziani, Abdelali Hammouti, Abdallah Jaafar

    Optics express
    |August 13, 2025
    PubMed
    概括

    开发了使用石化玻璃和多孔的中红外波导传感器. 多孔提供了优越的二氧化碳检测极限,这是由于其结构中的光物质相互作用增强.

    更多相关视频

    Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
    07:28

    Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

    Published on: August 30, 2012

    10.9K
    High-definition Fourier Transform Infrared FT-IR Spectroscopic Imaging of Human Tissue Sections towards Improving Pathology
    11:05

    High-definition Fourier Transform Infrared FT-IR Spectroscopic Imaging of Human Tissue Sections towards Improving Pathology

    Published on: January 21, 2015

    33.4K

    相关实验视频

    Last Updated: Sep 11, 2025

    Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
    10:42

    Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

    Published on: March 22, 2019

    6.3K
    Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
    07:28

    Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

    Published on: August 30, 2012

    10.9K
    High-definition Fourier Transform Infrared FT-IR Spectroscopic Imaging of Human Tissue Sections towards Improving Pathology
    11:05

    High-definition Fourier Transform Infrared FT-IR Spectroscopic Imaging of Human Tissue Sections towards Improving Pathology

    Published on: January 21, 2015

    33.4K

    科学领域:

    • 材料科学 材料科学 材料科学
    • 光学工程是指光学工程.
    • 化学传感器 化学传感器

    背景情况:

    • 中红外 (中红外) 光谱对于化学分析至关重要.
    • 开发高效的波导传感器用于中红外应用是一个活跃的研究领域.

    研究的目的:

    • 制造和比较基于石化玻璃 (ChG) 和多孔 (PSi) 平台的中红外波导传感器.
    • 评估它们在液体和气体传感应用中的性能.

    主要方法:

    • 采用射频磁喷射来沉积CHG层;采用电化学化来制备PSI层.
    • 脊柱波导使用光刻法和反应性离子蚀刻进行了图案设计.
    • 对液体 (乙二,异醇) 和气体 (CO2) 分析物进行了光谱传感实验.

    主要成果:

    • ChGs波导显示透明度范围为3.948.95μm,传播损失低 (2.5dB/cm).
    • PSi波导的透明度范围为3.944.55μm,损失更高 (9.1dB/cm).
    • 传感器实现了对乙二 (610 ppm),异醇 (300 ppm) 和二氧化碳 (17000 ppm在CHG上,600 ppm在PSI上) 的检测极限 (LoD).
    • 由于其多孔结构,PSI平台在气体传感方面表现出明显更高的光物质相互作用.

    结论:

    • 无论是ChG还是PSI平台,都适用于中红外波导传感.
    • 由于增强的光相互作用,PSI平台为气体传感应用提供了卓越的性能,特别是CO2.
    • 开发的传感器显示出在现实环境中分析复杂混合物的潜力.