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Related Concept Videos

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.
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Consider a polar dielectric placed in an external field. In such a dielectric, opposite charges on adjacent dipoles neutralize each other, such that the net charge within the dielectric is zero. When a polar dielectric is inserted in between the capacitor plates, an electric field is generated due to the presence of net charges near the edge of the dielectric and the metal plates interface. Since the external electrical field merely aligns the dipoles, the dielectric as a whole is neutral. An...
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Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
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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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Crystal Field Theory
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Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
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Soft Display Using Photonic Crystals on Dielectric Elastomers.

Tenghao Yin1, Tonghao Wu1, Danming Zhong1

  • 1State Key Laboratory of Fluid Power & Mechatronic System, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Department of Engineering Mechanics , Zhejiang University , Hangzhou 310027 , China.

ACS Applied Materials & Interfaces
|July 4, 2018
PubMed
Summary

Researchers developed a novel soft display using dielectric elastomer and photonic crystals. This new technology offers dynamic color change, flexibility, and stretchability, addressing limitations of current soft display options.

Keywords:
chromaticdielectric elastomerphotonic crystalrobustnesssoft display

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Display Technology

Background:

  • Soft displays are increasingly important due to advancements in soft materials.
  • Existing soft display technologies (LEDs, LCDs, QDs, phosphors) often lack desired features like full flexibility, stretchability, and cost-effectiveness.
  • There is a need for soft displays that are colorful, nontoxic, easily fabricated, and inexpensive.

Purpose of the Study:

  • To introduce a new type of soft display technology.
  • To develop a soft display that integrates multiple desired features, including dynamic color change.
  • To explore the potential of this new display for next-generation applications.

Main Methods:

  • Fabrication of a novel soft display device.
  • Integration of dielectric elastomer and photonic crystals.
  • Characterization of the display's optical and mechanical properties.

Main Results:

  • The developed soft display exhibits dynamic, in-situ color change.
  • The device is flexible, stretchable, colorful, and nontoxic.
  • Angle-dependent characteristics and excellent mechanical reliability were observed.

Conclusions:

  • The novel dielectric elastomer and photonic crystal-based soft display meets key requirements for advanced display technology.
  • This technology presents a promising alternative to existing soft displays, offering a unique combination of features.
  • The proposed concept has broad application potential across various fields.