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In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and...
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Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
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Hormones—or any molecule that binds to a receptor, known as a ligand—that are lipid-insoluble (water-soluble) are not able to diffuse across the cell membrane. In order to be able to affect a cell without entering it, these hormones bind to receptors on the cell membrane. When a first messenger, a hormone, binds to a receptor, a signal cascade is set off, causing second messengers, proteins inside the cell, to become activated, resulting in downstream effects.
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When a paint brush is immersed in water, the bristles wave freely inside the water. When it is taken out, the bristles stick together. The reason behind this effect is surface tension.
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Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows that all magnets have two poles: one is labeled north (N) and the other south (S). Magnetic poles repel if they are alike and attract if unlike. Moreover, both poles of a magnet attract unmagnetized pieces of iron.
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吸附诱导的表面磁性 吸附诱导的表面磁性

Miloš Baljozović1, Shiladitya Karmakar2, André L Fernandes Cauduro3

  • 1Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland.

ACS nano
|January 30, 2026
PubMed
概括
此摘要是机器生成的。

在非磁性材料中,当特定的分子吸附在铜表面时,磁性就会出现. 这种吸附诱导的磁性在接口上局部化,并提供了设计自旋极化状态的新方法.

关键词:
哈伯德模型的模型化学吸收 化学吸收奇拉性诱导的旋转选择性旋极化低能电子显微镜 (SP-LEEM) 的应用表面磁力 表面磁力

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科学领域:

  • 凝聚物质物理学 凝聚物质物理学
  • 材料科学 材料科学 材料科学
  • 表面科学是一门学科.

背景情况:

  • 分子 - 金属接口对于自旋电子学至关重要.
  • 在非磁性材料中诱导磁性是一个重大挑战.
  • 异乙烯分子具有独特的电子特性.

研究的目的:

  • 调查在异烯/Cu100) 系统中磁性的出现.
  • 确定吸附诱导磁性背后的机制.
  • 探索工程自旋极化状态的潜力.

主要方法:

  • 旋转极化低能电子显微镜 (SPLEEM) 用于旋转依赖的反射性.
  • 在不同基板 (清洁Cu100,石墨) 上进行对照实验.
  • 旋转极化密度函数理论 (SP-DFT) 的计算.
  • 扩展的纽恩斯-安德森-格里姆利模型模拟.

主要成果:

  • SPLEEM 揭示了 Cu 上的 7,12,17-trioxa[11]helicene (TO[11]H) 单层的自旋依赖电子反射性.
  • 磁力局部存在于最顶层的铜层中,而不是来自分子本身或性.
  • SP-DFT和理论模型将磁性归因于强化学吸收,杂交和库伦相关性.

结论:

  • 在Cu(100) 上的TO[11]H的化学吸收会在接口上诱导一个自旋极化状态.
  • 这项研究展示了在分子金属系统中产生磁性的新机制.
  • 这些发现为设计有机-无机混合材料提供了途径,这些材料具有量身定制的自旋特性.