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MOS Capacitor

MOS Capacitor

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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Related Experiment Video

Updated: Jul 21, 2026

Fabrication of Ti3C2 MXene Microelectrode Arrays for In Vivo Neural Recording

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Published on: February 12, 2020

Liquid-Crystalline MXene Inks Enable Stack-Free Thick Electrodes for High-Performance 3D-Printed

Shuqing Cao¹, Rui He¹, Boyu Mu¹

¹Key Laboratory for the Physics and Chemistry of Nanodevices and Center for Carbon-based Electronics, School of Electronics, Peking University, Beijing 100871, China.

|January 9, 2026

Summary

We developed a novel 3D printing method using MXene liquid crystal (MLC) ink to create stack-free micro-supercapacitors (MSCs). This technique enhances energy and power density for advanced portable electronics.

Keywords:

3D printing MXene liquid crystal nanosheet alignment on-chip microsupercapacitors thick electrodes

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Last Updated: Jul 21, 2026

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Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System

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Published on: January 7, 2022

Area of Science:

Materials Science
Energy Storage
Nanotechnology

Background:

Miniaturized energy storage is crucial for portable electronics.
On-chip micro-supercapacitors (MSCs) offer high power density and stability.
MXene nanosheets are promising electrode materials but prone to stacking, hindering performance.

Purpose of the Study:

To develop a fabrication method for high-performance MXene-based MSCs.
To overcome the challenge of MXene nanosheet stacking in electrodes.
To enable the creation of thick, aligned MXene electrodes for enhanced energy storage.

Main Methods:

Utilized MXene liquid crystal (MLC) to prevent nanosheet stacking.
Developed a filtration method for homogeneous, viscoelastic MLC ink.
Employed 3D printing to fabricate thick, horizontally aligned MXene electrodes.

Main Results:

Achieved stack-free MXene electrodes with controlled alignment and thickness up to several hundred micrometers.
Facilitated rapid ion transport through the engineered electrode architecture.
Demonstrated significantly higher energy and power densities (32.32 μWh cm^-2 and 8000 μW cm^-2) compared to traditional methods.

Conclusions:

The MLC ink and 3D printing technique enable high-performance MSC fabrication.
This approach offers superior ion transport and energy storage capabilities.
Presents a promising pathway for advanced MSCs in wearable and flexible electronics.