灵活分子多铁天线的动态调制
Zhongxuan Wang1, Nathan Lazarus2, Shenqiang Ren1
1Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States.
ACS nano
|July 31, 2025
概括
灵活的多铁纳米复合材料使可调节的微波天线频率调制成为可能. 这些可穿戴材料结合了压电和磁性特性,响应光和电场,用于先进的通信应用.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 电气工程 电气工程
背景情况:
- 频率调制对于现代通信,雷达和电子对策至关重要.
- 多铁材料为微波设备提供了优势,因为它们的电磁双极相结合,使无接触调制成为可能.
- 现有技术需要在可穿戴应用中提高灵活性,耐用性和可调性.
研究的目的:
- 为适应性微波天线开发灵活和可穿戴的多铁基纳米复合材料.
- 为了实现对光响应的多铁特性和动态频率调制.
- 为了提高实际应用的机械稳定性和耐用性.
主要方法:
- 将分子压电和磁性材料结合成纳米复合材料.
- 利用光学刺激调整磁性异构和电场以增强机械性能.
- 整合一个聚乙烯醇矩阵,以提高机械稳定性.
主要成果:
- 证明了强大的压电响应用于磁性特性调制.
- 在光照射下,由于可调节的磁性异构性,磁化率降低了30%.
- 在灵活的天线中启用了动态频率调制,可在4.3至4.05 GHz调节.
- 在电场下,Young的模量增加了36% (42.5到58MPa),提高了耐用性.
结论:
- 开发的灵活的多铁纳米复合材料为可穿戴和自适应微波天线系统提供了一个有前途的平台.
- 协同的光学和机械刺激使有效的动态频率调制成为可能.
- 这些材料具有增强的灵活性,耐用性和频率可调性,满足关键应用要求.
更多相关视频
09:06Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
8.2K
10:40A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
Published on: April 8, 2018
8.3K
相关概念视频
01:31Ferromagnetism
2.5K
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...
2.5K
01:17Magnetic Damping
558
Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
558
01:27Biasing of Metal-Semiconductor Junctions
335
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
335