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Related Experiment Video

Updated: Jun 25, 2026

Atomically Traceable Nanostructure Fabrication

Atomically Traceable Nanostructure Fabrication

Published on: July 17, 2015

Large-Area Atomically Thin WS₂ Enables Exceptionally Scratch-Resistant Silica Glass.

Sourav Sahoo¹, Deepa Thakur², Manish Verma¹

¹Department of Materials Science and Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.

Small (Weinheim an Der Bergstrasse, Germany)

|December 15, 2025

Summary

This summary is machine-generated.

Atomically thin tungsten disulfide (WS₂) films on glass create ultra-scratch-resistant surfaces. This 2D material coating significantly reduces friction and wear, protecting glass from damage.

Keywords:

CVD WS2 friction glass scratch silica wear

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Area of Science:

Materials Science
Nanotechnology
Surface Engineering

Background:

Scratch damage on glass compromises mechanical strength and functionality.
Developing effective protective coatings for glass is crucial for various applications.

Purpose of the Study:

To investigate the potential of atomically thin tungsten disulfide (WS₂) films for creating ultra-scratch-resistant glass surfaces.
To elucidate the mechanism behind the enhanced scratch resistance provided by WS₂ coatings.

Main Methods:

Large-scale growth of WS₂ films on silica glass via chemical vapor deposition.
Rigorous scratch tests using atomic force microscopy (AFM).
Atomistic simulations to understand the protection mechanism.

Main Results:

A monolayer of WS₂ reduced nanoscale friction by approximately 95%, preventing severe plowing wear.
WS₂ coatings resulted in minor glass surface distortions instead of significant damage.
Atomistic simulations revealed shear-induced transitions in the silica network, acting as a non-wear dissipation mechanism.

Conclusions:

Atomically thin WS₂ coatings offer a promising solution for next-generation scratch-resistant glass.
The study provides insights into the protective mechanisms of 2D materials against surface wear.