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相关概念视频

Capacitor With A Dielectric01:18

Capacitor With A Dielectric

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Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
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Spherical and Cylindrical Capacitor01:26

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A spherical capacitor consists of two concentric conducting spherical shells of radii R1 (inner shell) and R2 (outer shell). The shells have  equal and opposite charges of +Q and −Q, respectively. For an isolated conducting spherical capacitor, the radius of the outer shell can be considered to be infinite.
Conventionally, considering the  symmetry, the electric field between the concentric shells of a spherical capacitor is directed radially outward. The magnitude of the field,...
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MOS Capacitor01:25

MOS Capacitor

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A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
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Strain and Elastic Modulus01:15

Strain and Elastic Modulus

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The quantity that describes the deformation of a body under stress is known as strain. Strain is given as a fractional change in either length, volume, or geometry under tensile, volume (also known as bulk), or shear stress, respectively, and is a dimensionless quantity. The strain experienced by a body under tensile or compressive stress is called tensile or compressive strain, respectively. In contrast, the strain experienced under bulk stress and shear stress is known as volume and shear...
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Capacitors01:15

Capacitors

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Capacitors play a crucial role in car radios, where they filter and store frequencies to ensure clear signal reception. Essentially serving as energy storage devices, capacitors store energy within their electric field and are composed of two parallel conducting plates separated by a dielectric.
When a voltage source is connected to a capacitor, positive and negative charges accumulate on the opposite plates. This accumulation generates a potential difference that equals the product of the...
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Dielectric Polarization in a Capacitor01:31

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The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
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Updated: Jul 23, 2025

Author Spotlight: Microfluidic Channel-Based Soft Electrodes and Their Application in Capacitive Pressure Sensing
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可绘制的基于的波纹软弹性体电容器,用于区域应变传感.

Han Liu1, Simon Laflamme1,2, Matthias Kollosche1,3

  • 1Department of Civil, Construction, and Environmental Engineering, Iowa State University, Ames, IA 50011, USA.

Sensors (Basel, Switzerland)
|July 14, 2023
PubMed
概括

使用开发了一种新的可涂装软弹性体电容 (cSEC) 传感器,可直接用于结构健康监测. 这一进步克服了以前的环氧基传感器的局限性,为灵活的电子产品提供了更通用的解决方案.

关键词:
这是一个复合材料.灵活的传感器灵活的传感器大面积的电子产品.一个聚合物聚合物.制品是一种制品.软弹性体电容器 软弹性体电容器压力 压力 压力 压力可伸缩的传感器传感器结构健康监测 结构健康监测

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科学领域:

  • 材料科学 材料科学 材料科学
  • 机械工程 机械工程
  • 电气工程 电气工程

背景情况:

  • 软聚合物材料对于开发符合规定的机器和设备至关重要,特别是在灵活和可拉伸的电子产品中.
  • 基于软聚合物的大面积电子 (LAE) 正在探索用于结构健康监测 (SHM) 应用,需要能够适应各种表面并检测变形的传感器.
  • 之前的工作引入了使用 styrene-ethylene-butadiene-styrene (SEBS) 的波纹软弹性体电容器 (cSEC),但其依赖环氧体的粘合限制了其部署.

研究的目的:

  • 为了开发一个可绘制的波纹软弹性体电容 (cSEC) 传感器.
  • 创建适合直接应用的cSEC传感器的无溶剂制造方法.
  • 评估新的可涂料基cSEC的性能,并将其与已建立的基于SEBS的cSEC进行比较.

主要方法:

  • 采用无溶剂制造方法,使用室温化作为宿主矩阵.
  • 泰坦亚颗粒被纳入中,形成介电层,碳黑被用于导电伸展电极.
  • 通过将涂在表面上,然后沉积并行板电容结构来应用传感器.

主要成果:

  • 油漆的-cSEC表现出良好的机电行为,具有高线性 (R2 = 0.9901),尺寸系数为1.58,分辨率为70 μm.
  • 与SEBS-cSEC在悬臂板上的性能比较显示了可比的结果,尽管涂料带来了更多的噪音和对主导频率的轻微低估.
  • 该研究证明了SHM可绘制传感器的可行性,克服了基于溶剂的制造和环氧粘合的局限性.

结论:

  • 开发的可涂料-cSEC为结构健康监测应用提供了一个有前途的替代方案,使其在复杂的表面上更容易部署.
  • 虽然性能与现有技术相提并论,但可能需要进一步的研究来减轻与漆相关的噪音和频率低估问题.
  • 这一进步为在结构健康监测和其他需要灵活传感器的领域中更容易获得和更具多功能的大面积电子产品铺平了道路.