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

Ferromagnetism01:31

Ferromagnetism

2.9K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.9K
Diamagnetism01:26

Diamagnetism

2.9K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
2.9K
Paramagnetism01:30

Paramagnetism

3.0K
Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
3.0K
Magnetic Susceptibility and Permeability01:31

Magnetic Susceptibility and Permeability

2.2K
In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
2.2K
Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

9.0K
Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
9.0K

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

Bias-Engineered Synthetic Antiferromagnets Hosting Sub-20 nm Zero-Field Skyrmions at Room Temperature.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Radical-Based On-Surface Transformation of Nonplanar Aromatics Into Nonbenzenoid Nanographenes.

Angewandte Chemie (International ed. in English)·2026
Same author

Continuous Coagulation Monitoring in Human Blood Samples via Magnetic Particle Spectroscopy.

International journal of nanomedicine·2026
Same author

Simple-to-Fabricate and Water-Stable Instrument Markers for Preclinical Magnetic Particle Imaging and Magnetic Resonance Imaging.

Medical devices (Auckland, N.Z.)·2026
Same author

Multi-contrast magnetic particle imaging for tomographic pH monitoring using stimuli-responsive hydrogels.

Communications engineering·2026
Same author

Nanoparticle Metal Mass Uptake Correlates with Radiosensitizing Efficacy across 2D, 3D, and In Vivo Models.

ACS applied bio materials·2026

相关实验视频

Updated: Jan 10, 2026

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.9K

超铁磁磁盘颗粒用于磁粒子成像

Erik M Mayr1,2,3,4,5, Justin Ackers6, Alexander Gogos4

  • 1Nanoparticle Systems Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, 8092, Zurich, Switzerland.

Small methods
|November 24, 2025
PubMed
概括
此摘要是机器生成的。

新的超铁磁 (SF) 磁盘纳米粒子显著提高了磁粒子成像 (MPI) 的性能. 这些先进的追踪器提供了更好的空间分辨率和灵敏度,为临床MPI应用铺平了道路.

关键词:
磁盘颗粒中的磁盘粒子.磁性纳米粒子是一种磁性纳米粒子.磁性颗粒成像技术 磁性粒子成像技术超级铁磁主义是超级铁磁主义.

更多相关视频

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
07:42

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Published on: July 20, 2022

3.2K
Fabrication of Magnetic Nanostructures on Silicon Nitride Membranes for Magnetic Vortex Studies Using Transmission Microscopy Techniques
06:27

Fabrication of Magnetic Nanostructures on Silicon Nitride Membranes for Magnetic Vortex Studies Using Transmission Microscopy Techniques

Published on: July 2, 2018

8.5K

相关实验视频

Last Updated: Jan 10, 2026

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.9K
Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
07:42

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Published on: July 20, 2022

3.2K
Fabrication of Magnetic Nanostructures on Silicon Nitride Membranes for Magnetic Vortex Studies Using Transmission Microscopy Techniques
06:27

Fabrication of Magnetic Nanostructures on Silicon Nitride Membranes for Magnetic Vortex Studies Using Transmission Microscopy Techniques

Published on: July 2, 2018

8.5K

科学领域:

  • 材料科学 材料科学 材料科学
  • 生物医学工程 生物医学工程
  • 纳米技术纳米技术

背景情况:

  • 磁性粒子成像 (MPI) 能够提供灵敏,无辐射的成像,但受到当前超偏磁性 (SP) 追踪器性能的限制.
  • 由于现有标记物的分辨率和灵敏度低于最佳,MPI的临床转化受到阻碍.

研究的目的:

  • 开发和评估新型超铁磁 (SF) 圆盘形纳米粒子作为磁性粒子成像 (MPI) 的先进追踪器.
  • 通过工程纳米粒子设计,提高MPI的空间分辨率和灵敏度.

主要方法:

  • 从超铁磁 (SF) 不连续金属绝缘体多层 (DMIM) 制造盘状纳米粒子.
  • 纳米粒子磁性特性的表征,包括高灵敏度和低于1mT的急性磁化切换.
  • 在MPI实验中对纳米粒子性能进行评估,并将其与已建立的Perimag追踪器进行比较.

主要成果:

  • 由于岛际交换相互作用,工程磁盘粒子 (MDP) 表现出强大的SF行为.
  • 与Perimag.com相比,MDP显示空间分辨率提高了1.6倍,灵敏度增加了2.4倍.
  • 通过系统矩阵测量和混合重建,在复杂几何形状中证实了MDP的优异成像特性.

结论:

  • SF DMIM 磁盘代表了MPI一个有前途的下一代追踪平台.
  • 这些先进的追踪器有可能简化MPI扫描器设计.
  • 这些发现为MPI技术的临床转化铺平了道路.