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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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Updated: May 18, 2026

Fabrication of Ti3C2 MXene Microelectrode Arrays for In Vivo Neural Recording

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A Highly Stable MXene Aqueous Conductive Ink for Inkjet Printing Flexible Microsupercapacitors.

Wei Cao¹, Pingping Gong¹, Weiwei Wang¹

¹School of Advanced Materials and Nanotechnology, Xidian University, Xi'an 710126, China.

ACS Applied Materials & Interfaces

|April 22, 2026

Summary

This summary is machine-generated.

Researchers developed a stable aqueous MXene ink by grafting sodium dodecyl sulfate (SDS) onto MXene. This enhances microsupercapacitor (MSC) performance and stability for flexible electronics.

Keywords:

MXene inkjet printing microsupercapacitors sodium dodecyl sulfate stability

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Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

MXene-based microsupercapacitors (MSCs) are promising for portable and wearable electronics.
Aqueous MXene inks offer eco-friendly advantages but suffer from poor MXene stability in water.

Purpose of the Study:

To develop a highly stable aqueous MXene ink for improved MSC performance.
To enhance the dispersion and structural integrity of MXene nanoflakes in aqueous solutions.

Main Methods:

Grafting sodium dodecyl sulfate (SDS) onto MXene surfaces via electrostatic interactions and hydrogen bonding.
Inkjet printing of interdigital electrodes on polyethylene terephthalate substrates.
Electrochemical performance evaluation of assembled MSCs.

Main Results:

SDS grafting significantly improved MXene ink stability (lifetime constant 157.3 days vs. 22.1 days).
Inkjet-printed electrodes exhibited high resolution (150 μm) and conductivity (1091 S/cm).
MSCs using SDS-MXene ink showed a fourfold increase in volume capacitance (714.3 F/cm³ vs. 177 F/cm³).
SDS-MXene based MSCs retained performance after 60 days of aging and demonstrated good flexibility.

Conclusions:

A stable aqueous MXene ink formulation was successfully developed using SDS.
The enhanced ink enables high-performance, stable, and flexible MSCs suitable for advanced electronic applications.
This approach provides a versatile platform for developing various MXene-based electronic devices.