Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Search research articles

Related Experiment Video

Updated: Jun 13, 2026

A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics

A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics

Published on: August 28, 2018

Au-Decorated WS₂/SnO₂ Heterostructures for Enhanced Room-Temperature NO₂ Sensing.

Myung Sik Choi¹, Jae-Hun Kim²

¹Department of Nano & Advanced Materials Science and Engineering, Kyungpook National University, Sangju 37224, Republic of Korea.

Sensors (Basel, Switzerland)

|June 12, 2026

Summary

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Promoting Gas Sensitivity of Graphitic Carbon Nitride via Incorporation of Platinum Nanoparticles under Blue-Light Irradiation.

ACS sensors·2026

Same author

A synthetic method for preparing double channelling materials, and an operational mechanism for selective p- and n-type channels for gas sensing.

Microsystems & nanoengineering·2026

Same author

Simultaneous engineering of the surface (oxygen/amorphous carbon) and interface (amorphous carbon/ZnO) of ZnO using a one-spoon amorphous carbon deposition technique.

Journal of advanced research·2026

Same author

Tuning Gas Sensor Selectivity via Morphological Engineering of Au Catalysts on TiO<sub>2</sub>-based Nanosheets.

Small (Weinheim an der Bergstrasse, Germany)·2025

Same author

Effect of the Chemical Structure of a Self-Assembled Monolayer on the Gas-Sensing Behavior of SnO<sub>2</sub> Nanowires.

ACS sensors·2024

Same author

Promoted room temperature NH<sub>3</sub> gas sensitivity using interstitial Na dopant and structure distortion in Fe<sub>0.2</sub>Ni<sub>0.8</sub>WO<sub>4</sub>.

Frontiers in chemistry·2024

Highly reliable room-temperature gas sensors for detecting toxic nitrogen dioxide (NO2) were developed using WS2-SnO2 nanocomposites decorated with gold nanoparticles. The optimized sensor shows excellent ppb-level detection and stability.

Area of Science:

Materials Science
Nanotechnology
Chemical Sensing

Background:

Nitrogen dioxide (NO2) is a toxic gas requiring sensitive detection.
Room-temperature gas sensors with low power consumption are crucial for practical applications.
Developing advanced materials for enhanced gas sensing is an active research area.

Purpose of the Study:

To synthesize and optimize WS2 nanosheet-SnO2 nanowire (NW) nanocomposites decorated with gold nanoparticles (NPs) for NO2 gas sensing.
To investigate the effect of SnO2 content and UV irradiation time on sensor performance.
To achieve highly reliable room-temperature NO2 detection with low power consumption.

Main Methods:

Synthesis of WS2 nanosheet (NS)-SnO2 nanowire (NW) nanocomposites.

Keywords:

Au NPs NO2 RT SnO2 NWs WS2 NSs gas sensor sensing mechanism

More Related Videos

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication

Published on: November 28, 2017

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Related Experiment Videos

Last Updated: Jun 13, 2026

A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics

A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics

Published on: August 28, 2018

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication

Published on: November 28, 2017

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Decoration of nanocomposites with gold nanoparticles (NPs) via UV irradiation.

Systematic optimization of SnO2 content (1, 5, 10 wt%) and UV irradiation time (1, 15, 30 s).

Gas sensing performance evaluation at room temperature.

Main Results:

The WS2-SnO2 nanocomposite with 5 wt% SnO2 (SW5) showed the highest response among Au-free sensors.
The 15 s UV-treated sample (15Au-SW5) exhibited a significantly enhanced response of 11.7 towards NO2.
The optimized sensor achieved ppb-level detection (~40 ppb limit of detection) with good selectivity, repeatability, and stability.
Enhanced performance attributed to WS2-SnO2 heterojunctions and Au-induced surface modulation facilitating charge transfer and reactive sites.

Conclusions:

WS2 NS-SnO2 NW nanocomposites decorated with Au NPs are effective for high-performance room-temperature NO2 sensing.
Controlled noble metal decoration on 2D/1D heterostructures is a viable strategy for advanced gas sensor development.
The optimized sensor offers a promising solution for reliable environmental monitoring of toxic gases.