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

Chemical Shift: Internal References and Solvent Effects01:17

Chemical Shift: Internal References and Solvent Effects

673
In an NMR sample, precise measurement of the absolute absorption frequencies of nuclei is difficult. A standard internal reference compound is added, and the frequency difference between the reference signal and sample signals is measured.
The internal reference compound generally used in NMR spectroscopy is tetramethylsilane (TMS). TMS is preferred because it is chemically inert, soluble in NMR solvents, and easily removable. Also, the highly shielded methyl protons in TMS yield an intense...
673
High-Resolution Mass Spectrometry (HRMS)01:15

High-Resolution Mass Spectrometry (HRMS)

1.4K
The resolution of a mass spectrometer depends on the efficiency of separating ions with different ion masses. The mass of an atom is approximated to the sum of the masses of protons and neutrons inside, considering the masses of protons and neutrons as equal. However, the masses of the proton (1.6726 × 10−24 g) and neutron (1.6749 × 10−24 g) are not truly equal. There is a minor error in the expression of atomic masses relative to the simplest atom of hydrogen. For...
1.4K

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

Mars Organic Geochemistry-Are We Alone, and Where Did We Come From?

Astrobiology·2026
Same author

A "one-two punch" strategy to reverse immunosuppressive metabolism and activate T-cell immunity for enhanced cancer checkpoint immunotherapy.

Journal of nanobiotechnology·2026
Same author

The association between steatotic liver disease and chronic kidney disease: a meta-analysis and Mendelian randomization study highlighting metabolic comorbidities.

Nutrition & diabetes·2026
Same author

Bicarbonate-Mediated Generation of H<sub>2</sub>O<sub>2</sub>, <sup>1</sup>O<sub>2</sub>, and OH<sup>*</sup> at the Hydrophobic Gas-Water Interface and Its Underlying Mechanism.

Langmuir : the ACS journal of surfaces and colloids·2026
Same author

Oxidative Balance Score, Genetic Predictors of the Gut Microbiome, and the Risk of Metabolic-Associated Fatty Liver Disease: A Cohort Study.

Molecular nutrition & food research·2026
Same author

A highly efficient method for screening dual-target inhibitory peptides against angiotensin I-converting enzyme and α-amylase from Chlorella using an enzyme-immobilized affinity membrane.

International journal of biological macromolecules·2025

相关实验视频

Updated: Jul 18, 2025

Atomically Traceable Nanostructure Fabrication
12:35

Atomically Traceable Nanostructure Fabrication

Published on: July 17, 2015

8.8K

高效率和可靠价值的几何标准:集成周期结构参考材料.

Chenying Wang1,2, Di Liu2,3, Yaxin Zhang2,3

  • 1School of Instrument Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China.

Micromachines
|August 26, 2023
PubMed
概括

具有集成周期结构的新参考材料为光学仪器和微CT提供了扩展的校准能力. 这些材料可以实现高效,多值校准,精度提高和多种模式类型.

关键词:
蚀刻深度 蚀刻深度 蚀刻深度综合集成的整合.线条宽度 线条宽度 线条宽度周期结构是周期结构.时间段 时期 时期参考材料是参考材料的参考材料.侧墙垂直性 侧墙垂直性

更多相关视频

Reliable Mechanochemistry: Protocols for Reproducible Outcomes of Neat and Liquid Assisted Ball-mill Grinding Experiments
13:05

Reliable Mechanochemistry: Protocols for Reproducible Outcomes of Neat and Liquid Assisted Ball-mill Grinding Experiments

Published on: January 23, 2018

10.7K
Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon
06:57

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon

Published on: July 17, 2020

2.2K

相关实验视频

Last Updated: Jul 18, 2025

Atomically Traceable Nanostructure Fabrication
12:35

Atomically Traceable Nanostructure Fabrication

Published on: July 17, 2015

8.8K
Reliable Mechanochemistry: Protocols for Reproducible Outcomes of Neat and Liquid Assisted Ball-mill Grinding Experiments
13:05

Reliable Mechanochemistry: Protocols for Reproducible Outcomes of Neat and Liquid Assisted Ball-mill Grinding Experiments

Published on: January 23, 2018

10.7K
Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon
06:57

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon

Published on: July 17, 2020

2.2K

科学领域:

  • 计量学和仪器仪表技术
  • 材料科学 材料科学 材料科学
  • 纳米制造的纳米制造

背景情况:

  • 集成周期结构对于校准光学仪器和微型CT至关重要.
  • 现有的参考材料在测量范围,图案多样性和校准参数方面存在局限性.

研究的目的:

  • 开发具有增强校准功能的先进的综合周期结构参考材料.
  • 克服当前用于光学和微CT校准的参考材料的局限性.

主要方法:

  • 使用光刻法和感应合等离子体 (ICP) 蚀刻的制造.
  • 在ICP蚀刻过程中分析结构形态变化的 MATLAB 模拟.
  • 图像处理和快速里埃转换 (FFT) 用于计量分析.

主要成果:

  • 实现了对线宽 (相对误差≤17.5%) 和周期 (相对误差≤1.5%) 的精确控制.
  • 控制30至60微米的蚀刻深度,适用于各种网格线宽.
  • 证明侧墙垂直度很高 (90° ± 0.8°,相对误差<0.9%).

结论:

  • 开发了用于高效,多值校准的多功能参考材料.
  • 新材料显著提高了光学仪器和微CT的校准精度和范围.
  • 成功地解决了现有的周期结构参考材料的局限性.