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Related Concept Videos

MOS Capacitor01:25

MOS Capacitor

906
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...
906

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Related Experiment Video

Updated: Aug 15, 2025

Elaborate Control of Inkjet Printer for Fabrication of Chip-based Supercapacitors
10:57

Elaborate Control of Inkjet Printer for Fabrication of Chip-based Supercapacitors

Published on: November 30, 2021

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Flexible high-performance microcapacitors enabled by all-printed two-dimensional nanosheets.

Pengxiang Zhang1, Yushui Fu2, Xin Zhang2

  • 1Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan 250061, China.

Science Bulletin
|January 5, 2023
PubMed
Summary
This summary is machine-generated.

Chemically exfoliated high-k perovskite nanosheets were used to create printable inks for flexible microcapacitors. These devices exhibit high capacitance densities and dielectric constants, showcasing potential for advanced electronic applications.

Keywords:
Dielectric enhancementHigh-k perovskite nanosheetsInkjet printingInterface effectMicrocapacitors

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrical Engineering

Background:

  • Chemically exfoliated nanosheets offer potential for electronic devices.
  • Solution-based processing, like inkjet printing, enables low-cost, scalable fabrication of flexible electronics.
  • Two-dimensional (2D) nanosheets are crucial for advanced functional inks.

Purpose of the Study:

  • To prepare printable inks from high-k perovskite nanosheets (Ca2Nb3O10 and Ca2NaNb4O13).
  • To fabricate and characterize microcapacitors using these inks and various electrodes (Ag, graphene).
  • To evaluate the dielectric properties, flexibility, and thermal stability of the fabricated microcapacitors.

Main Methods:

  • Chemical exfoliation of high-k perovskite materials.
  • Dispersion of exfoliated nanosheets in solvents to create printable inks.
  • Inkjet printing of microcapacitors with silver (Ag) and graphene electrodes.
  • Characterization of capacitance density, dielectric constant, breakdown strength, flexibility, and thermal stability.

Main Results:

  • Microcapacitors (Ag/Ca2Nb3O10/Ag, graphene/Ca2Nb3O10/graphene, graphene/Ca2NaNb4O13/graphene) achieved capacitance densities of 20, 80, and 150 nF/cm², respectively.
  • Dielectric constants reached 26, 110, and 200, with enhancement possibly due to the dielectric/graphene interface.
  • Devices demonstrated moderate breakdown strength (~1 MV/cm), excellent flexibility, and thermal stability up to 200 °C.

Conclusions:

  • High-k perovskite nanosheets are suitable for additive manufacturing of flexible dielectric capacitors.
  • Inkjet printing provides a viable method for fabricating high-performance flexible electronic devices.
  • The study highlights the potential of these materials for next-generation energy storage applications.