相关实验视频

Updated: Jul 8, 2025

Preparation and Reactivity of Gasless Nanostructured Energetic Materials

Preparation and Reactivity of Gasless Nanostructured Energetic Materials

Published on: April 2, 2015

水和热还原方法对发泡碳化物MXene片中电磁干扰屏蔽特征的比较效应

Reza Rahmati¹, Meysam Salari¹, Mehran Ashouri-Sanjani¹

¹Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario, M5S 3G8, Canada.

Small (Weinheim an der Bergstrasse, Germany)

|December 17, 2023

概括

研究人员开发了先进的MXene薄膜,用于电磁干扰 (EMI) 屏蔽. 热处理显著提高了屏蔽效率,达到118.4dB,为微薄屏蔽应用提供了一个有前途的解决方案.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
电气工程电气工程

背景情况:

对轻质,薄型电磁干扰 (EMI) 屏蔽材料的需求日益增长.
MXene材料具有金属导电性和薄膜可加工性,因此适合用于EMI屏蔽.
后处理处理可以显著影响MXene薄膜的屏蔽效率 (SE).

研究的目的:

为了比较氨酸和热还原方法制造泡碳化 (Ti3CNT_x) MXene 薄膜.
调查这些减少方法对MXene薄膜结构和特性的影响.
评估和优化制造的MXene膜的EMI屏蔽性能.

主要方法:

制造MXene薄膜 (大约1个月) 100微米厚) 使用碳化物 (Ti3CNT_x).
应用两种减少方法:水处理和热处理.
薄膜的孔隙性,形态,厚度,化学和电气性质的表征.
理论和实验确定EMI屏蔽效率 (SE).

主要成果:

水和热处理都产生了高度多孔的MXene结构 (多达74.0%的多孔性).
与原始片 (52.2 dB) 相比,经过处理的MXene片显示出增强的SE.
素处理提高了SE高达38%,而热处理提高了SE高达83%.
热处理薄膜在14.3 GHz实现了118.4 dB的SE记录.

结论:

热处理是一种比水处理更有效的方法,用于增强MXene薄膜的EMI屏蔽.
开发的发泡MXene薄膜展示了前所未有的EMI屏蔽性能.
这些发现对创建高性能,非金属EMI屏蔽材料具有重大意义.

关键词:

电磁干扰屏蔽电磁干扰屏蔽热处理热处理的方法在水治疗过程中使用水.表面的修改表面的修改碳化物MXene泡是一种碳化物.

更多相关视频

Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles

Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles

Published on: November 27, 2015

Fabrication of Ti3C2 MXene Microelectrode Arrays for In Vivo Neural Recording

Fabrication of Ti3C2 MXene Microelectrode Arrays for In Vivo Neural Recording

Published on: February 12, 2020

相关概念视频

Diamagnetic Shielding of Nuclei: Local Diamagnetic Current

Diamagnetic Shielding of Nuclei: Local Diamagnetic Current

An applied magnetic field causes the electrons present in the molecule to circulate, setting up a local diamagnetic current within the molecule. The local diamagnetic current arising from circulating sigma-bonding electrons induces a magnetic field, Blocal that opposes the applied magnetic field, B0. The effective magnetic field experienced by these nuclei is given by the difference between the applied and local magnetic fields in a phenomenon called local diamagnetic shielding. Essentially,...

π Electron Effects on Chemical Shift: Overview

π Electron Effects on Chemical Shift: Overview

An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...