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Significantly enhanced NO2 gas-sensing performance of nanojunction-networked SnO2 nanowires by pulsed UV-radiation

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Main Author: Nguyen, Manh Hung
Other Authors: Chu, Manh Hung
Format: Article
Language:English
Published: Sensors and Actuators A: Physical 2021
Subjects:
SnO2 nanowires
Networked nanowires
UV-radiation
Gas sensors
Online Access:https://www.sciencedirect.com/science/article/abs/pii/S0924424721002223?via%3Dihub#!
https://dlib.phenikaa-uni.edu.vn/handle/PNK/1926
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spelling oai:localhost:PNK-19262022-08-17T05:54:45Z Significantly enhanced NO2 gas-sensing performance of nanojunction-networked SnO2 nanowires by pulsed UV-radiation Nguyen, Manh Hung Chu, Manh Hung Nguyen, Van Duy Nguyen, Duc Hoa Hoang, Si Hong Tran, Khoa Dang Nguyen, Ngoc Viet Le, Viet Thong Phan, Hong Phuoc Nguyen, Van Hieu SnO2 nanowires Networked nanowires UV-radiation Gas sensors Q1 A unique combination of high response and fast response-recovery is still a challenge in the development of room-temperature gas sensors. Herein, we demonstrated the on-chip growth of nanojunction-networked SnO2 NW sensors to work under UV-radiation at room temperature. The morphological, compositional, and structural properties of synthesized SnO2 nanowires were examined using field emission electron microscopy, energy dispersive spectroscopy, X-ray diffraction, and high-resolution transmission electron microscopy, respectively. The results presented the SnO2 NWs with smooth surfaces were entangled between the Pt electrode. Besides, the internal properties showed the SnO2 NWs were crystallized as the tetragonal rutile structure of SnO2. The use of UV-radiation with the optimum intensity of 50 μW/cm2 increased the gas response to 5 ppm NO2 up to 7-fold, while response and recovery times decreased about 8- and 4-fold, respectively. Moreover, alternative use of pulsed UV-radiation (provided only during the air recovery phase) can enhance significant gas response as compared with continuous UV-radiation. The enhancement of gas response could be attributed to the photo-adsorption and -desorption of NO2 molecule due to the photogeneration of electron-hole pairs. The combination of NW-NW nanojunctions and pulsed UV-radiation is expected to be a novel strategy for high-performance room temperature gas sensors. 2021-07-05T04:32:58Z 2021-07-05T04:32:58Z 2021 Article https://www.sciencedirect.com/science/article/abs/pii/S0924424721002223?via%3Dihub#! https://dlib.phenikaa-uni.edu.vn/handle/PNK/1926 10.1016/j.sna.2021.112759 en application/pdf Sensors and Actuators A: Physical
institution Digital Phenikaa
collection Digital Phenikaa
language English
topic SnO2 nanowires
Networked nanowires
UV-radiation
Gas sensors
spellingShingle SnO2 nanowires
Networked nanowires
UV-radiation
Gas sensors
Nguyen, Manh Hung
Significantly enhanced NO2 gas-sensing performance of nanojunction-networked SnO2 nanowires by pulsed UV-radiation
description Q1
author2 Chu, Manh Hung
author_facet Chu, Manh Hung
Nguyen, Manh Hung
format Article
author Nguyen, Manh Hung
author_sort Nguyen, Manh Hung
title Significantly enhanced NO2 gas-sensing performance of nanojunction-networked SnO2 nanowires by pulsed UV-radiation
title_short Significantly enhanced NO2 gas-sensing performance of nanojunction-networked SnO2 nanowires by pulsed UV-radiation
title_full Significantly enhanced NO2 gas-sensing performance of nanojunction-networked SnO2 nanowires by pulsed UV-radiation
title_fullStr Significantly enhanced NO2 gas-sensing performance of nanojunction-networked SnO2 nanowires by pulsed UV-radiation
title_full_unstemmed Significantly enhanced NO2 gas-sensing performance of nanojunction-networked SnO2 nanowires by pulsed UV-radiation
title_sort significantly enhanced no2 gas-sensing performance of nanojunction-networked sno2 nanowires by pulsed uv-radiation
publisher Sensors and Actuators A: Physical
publishDate 2021
url https://www.sciencedirect.com/science/article/abs/pii/S0924424721002223?via%3Dihub#!
https://dlib.phenikaa-uni.edu.vn/handle/PNK/1926
_version_ 1751856255385731072
score 8.881002

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