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

Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

705
The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
705
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

293
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
293
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

723
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis.
723
Atomic Nuclei: Magnetic Resonance01:05

Atomic Nuclei: Magnetic Resonance

753
The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
753
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

594
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
594
Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

959
An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
959

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

Genetic modification of the marine-derived yeast Yarrowia lipolytica with high-protein content using a GPI-anchor-fusion expression system.

Biotechnology progress·2009
Same author

Regulation of the Edwardsiella tarda hemolysin gene and luxS by EthR.

Journal of microbiology and biotechnology·2009
Same author

EBV LMP2A-specific T cell immune responses elicited by dendritic cells loaded with LMP2A protein.

Cellular & molecular immunology·2009
Same author

[Combination of volar buttress plate with external fixator for the distal radial fractures of type C3 caused by high-energy injuries].

Zhongguo gu shang = China journal of orthopaedics and traumatology·2009
Same author

Environmental regulation of floral anthocyanin synthesis in Ipomoea purpurea.

Molecular ecology·2009
Same author

PI3K integrates the effects of insulin and leptin on large-conductance Ca2+-activated K+ channels in neuropeptide Y neurons of the hypothalamic arcuate nucleus.

American journal of physiology. Endocrinology and metabolism·2009

相关实验视频

Updated: Sep 11, 2025

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
11:45

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

Published on: August 17, 2017

14.6K

双原子 (Rb-Cs) 格子电磁光学陷

Lei Xu, Muming Li, Zhilong Yu

    Optics express
    |August 13, 2025
    PubMed
    概括

    这项研究引入了一种新的双色格子芯片,可以同时捕获鲁比-87和-133原子. 这一进步使得多种冷原子系统能够进行精确的测量.

    科学领域:

    • 原子,分子和光学物理学
    • 纳米技术纳米技术
    • 量子科学 是一个量子科学.

    背景情况:

    • 捕捉多个原子物种对于先进的量子技术至关重要.
    • 现有的双种捕捞方法往往面临效率和复杂性的局限性.
    • 网格芯片技术为小型化和高效的原子操纵提供了一个有前途的平台.

    研究的目的:

    • 设计和验证一种双色格芯片,用于同时捕获两种不同的原子物种.
    • 为了优化网格参数,以实现高效的双波长衍射和原子捕获.
    • 为了证明双种格子磁光陷 (GMOT) 系统的可行性.

    主要方法:

    • 模拟关键格参数,包括周期,蚀刻深度,工作周期和涂层.
    • 通过模拟确定了最佳设计参数 (T=210 nm,r=0.5,h0=100 nm,d=1150 nm).
    • 在实验中使用优化的格芯片实现了双种GMOT系统.

    主要成果:

    • 实现了1.6 × 10887 Rb原子和7.8 × 106133Cs原子的同时捕获.
    • 证明有效的双波长衍射对于捕捉多种物种至关重要.
    • 验证了拟议的格芯片设计的有效性.

    更多相关视频

    Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
    11:21

    Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

    Published on: March 30, 2017

    7.6K
    Gradient Echo Quantum Memory in Warm Atomic Vapor
    10:00

    Gradient Echo Quantum Memory in Warm Atomic Vapor

    Published on: November 11, 2013

    12.9K

    相关实验视频

    Last Updated: Sep 11, 2025

    Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
    11:45

    Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

    Published on: August 17, 2017

    14.6K
    Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
    11:21

    Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

    Published on: March 30, 2017

    7.6K
    Gradient Echo Quantum Memory in Warm Atomic Vapor
    10:00

    Gradient Echo Quantum Memory in Warm Atomic Vapor

    Published on: November 11, 2013

    12.9K

    结论:

    • 开发的双色网格芯片可以有效地同时捕捉双原子物种.
    • 这项技术为开发多种冷原子系统提供了一种新的方法.
    • 双种GMOT系统具有重要的应用潜力,可用于精密测量.