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

1.9K
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...
1.9K
IR Spectrometers01:25

IR Spectrometers

1.2K
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...
1.2K
Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

392
Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
392
IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration01:16

IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration

1.4K
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...
1.4K
Diffusion on Chromatography Columns01:07

Diffusion on Chromatography Columns

563
In column chromatography, when an analyte is introduced as a narrow band at the top of the column, the solutes begin to separate and broaden, developing a Gaussian profile. This broadening occurs due to various factors, such as longitudinal diffusion.
Longitudinal diffusion occurs when the solute molecules in the mobile phase diffuse from the more concentrated center of the chromatographic band to the more dilute regions on either side, both towards and against the flow direction. This...
563
IR Spectrum01:19

IR Spectrum

1.0K
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%...
1.0K

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

Reductive carboxylation via isocitrate dehydrogenase 1 supports cardiac metabolic adaptation during oncometabolic stress.

bioRxiv : the preprint server for biology·2026
Same author

Grafting Density as a Design Parameter for Dynamics and Flow of Neat Poly(dimethylsiloxane)-Grafted Silica Nanoparticles.

ACS applied materials & interfaces·2026
Same author

Metabolomics-constrained modelling reveals dominant oxidative metabolism in the Egyptian fruit bat myocardium.

PloS one·2026
Same author

Diet modulates cardiac metabolic stress during anthracycline treatment.

American journal of physiology. Heart and circulatory physiology·2026
Same author

Biomarker-integrated prognostic stagings for Alzheimer's Disease.

Nature communications·2026
Same author

Developing Topics.

Alzheimer's & dementia : the journal of the Alzheimer's Association·2025

相关实验视频

Updated: Jul 12, 2025

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
06:55

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Published on: September 26, 2016

7.9K

热梯度红外光谱仪用于聚合物中的扩散.

Ashley David1,2, Micah Silverman1,2, Kyoungmin Kim3

  • 1Florida A&M University-Florida State University College of Engineering, Tallahassee, Florida 32310, United States.

The journal of physical chemistry. B
|October 25, 2023
PubMed
概括

使用FTIR-ATR光谱学的新热梯度方法有效地测量了聚合物电解质中的扩散. 该技术提供了一种可重复的方法,用于确定固态电池和能量转换设备的材料中的扩散系数.

更多相关视频

Author Spotlight: Advances in Nanoscale Infrared Spectroscopy to Explore Multiphase Polymeric Systems
06:54

Author Spotlight: Advances in Nanoscale Infrared Spectroscopy to Explore Multiphase Polymeric Systems

Published on: June 23, 2023

868
In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging
06:34

In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging

Published on: September 2, 2016

6.4K

相关实验视频

Last Updated: Jul 12, 2025

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
06:55

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Published on: September 26, 2016

7.9K
Author Spotlight: Advances in Nanoscale Infrared Spectroscopy to Explore Multiphase Polymeric Systems
06:54

Author Spotlight: Advances in Nanoscale Infrared Spectroscopy to Explore Multiphase Polymeric Systems

Published on: June 23, 2023

868
In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging
06:34

In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging

Published on: September 2, 2016

6.4K

科学领域:

  • 材料科学 材料科学 材料科学
  • 物理化学 物理化学
  • 频谱学是一种光谱学.

背景情况:

  • 聚合物中的扩散测量对于开发先进的能源设备至关重要.
  • 传统方法面临的局限性,特别是不透明或半透明样品.
  • 聚合物电解质,如SEO中含有LiTFSI的电解质,是固态电池的关键组件.

研究的目的:

  • 引入和验证一种用于测量聚合物电解质中的扩散系数的新方法.
  • 为了比较一种新的温度梯度方法与先前建立的层叠方法.
  • 为了确定聚乙烯-聚乙烯氧化物 (SEO) 电解质中盐扩散的激活能量.

主要方法:

  • 使用时间解析的里叶变换红外衰减总反射率 (FTIR-ATR) 谱法.
  • 使用温度梯度通过索雷特效应 (方法1) 诱导盐度梯度.
  • 结果与使用不同度的不同度的聚合物电解质薄膜的方法进行了比较 (方法2).

主要成果:

  • 热梯度FTIR-ATR方法在测量Fickian扩散系数方面被证明是有效和可重复的.
  • 该研究确定了SEO电解质中盐扩散的激活能量.
  • FTIR-ATR克服了以前用于扩散测量的实验技术的局限性.

结论:

  • 热梯度FTIR-ATR是一种可行的技术,用于描述粘弹性固体中的扩散.
  • 这种方法有助于开发用于固态电池和热电池的材料.
  • 精确的扩散测量对于改善能源转换和储存系统至关重要.