Ion‐Conductive Hydrogel‐Based Stretchable, Self‐Healing, and Transparent NO 2 Sensor with High Sensitivity and Selectivity at Room Temperature

Small ◽  
2021 ◽  
pp. 2104997
Author(s):  
Zixuan Wu ◽  
Limin Rong ◽  
Jinglan Yang ◽  
Yaoming Wei ◽  
Kai Tao ◽  
...  
RSC Advances ◽  
2015 ◽  
Vol 5 (92) ◽  
pp. 75098-75104 ◽  
Author(s):  
Xinghua Chang ◽  
Mi Peng ◽  
Junfeng Yang ◽  
Teng Wang ◽  
Yu liu ◽  
...  

A light activated miniature formaldehyde sensor working at room temperature is fabricated by CdSO4 modified ZnO nanoparticles.


Molecules ◽  
2021 ◽  
Vol 26 (21) ◽  
pp. 6475
Author(s):  
Jiahui Guo ◽  
Weiwei Li ◽  
Xuanliang Zhao ◽  
Haowen Hu ◽  
Min Wang ◽  
...  

Semiconducting metal oxides can detect low concentrations of NO2 and other toxic gases, which have been widely investigated in the field of gas sensors. However, most studies on the gas sensing properties of these materials are carried out at high temperatures. In this work, Hollow SnO2 nanofibers were successfully synthesized by electrospinning and calcination, followed by surface modification using ZnO to improve the sensitivity of the SnO2 nanofibers sensor to NO2 gas. The gas sensing behavior of SnO2/ZnO sensors was then investigated at room temperature (~20 °C). The results showed that SnO2/ZnO nanocomposites exhibited high sensitivity and selectivity to 0.5 ppm of NO2 gas with a response value of 336%, which was much higher than that of pure SnO2 (13%). In addition to the increase in the specific surface area of SnO2/ZnO-3 compared with pure SnO2, it also had a positive impact on the detection sensitivity. This increase was attributed to the heterojunction effect and the selective NO2 physisorption sensing mechanism of SnO2/ZnO nanocomposites. In addition, patterned electrodes of silver paste were printed on different flexible substrates, such as paper, polyethylene terephthalate and polydimethylsiloxane using a facile screen-printing process. Silver electrodes were integrated with SnO2/ZnO into a flexible wearable sensor array, which could detect 0.1 ppm NO2 gas after 10,000 bending cycles. The findings of this study therefore open a general approach for the fabrication of flexible devices for gas detection applications.


Author(s):  
Peng Zhang ◽  
Satyajit Shukla ◽  
Larry Ludwig ◽  
Hyoung J. Cho ◽  
Sudipta Seal

Micro hydrogen sensor with interdigitated electrodes and indium doped nanopolycrystalline SnO2 particles was fabricated and tested. Giant sensitivity as high as 105 with good repeatability and recovery was observed. The sensor showed an excellant selectivity of hydrogen (H2) sensing over helium (He).


RSC Advances ◽  
2016 ◽  
Vol 6 (4) ◽  
pp. 2687-2694 ◽  
Author(s):  
Shouli Bai ◽  
Yaqiang Ma ◽  
Ruixian Luo ◽  
Aifan Chen ◽  
Dianqing Li

A smart sensor based on PANI–WO3 nanocomposite loaded on PET thin film not only exhibits high sensitivity and selectivity to triethylamine at room temperature, but also has flexibility, simple fabrication and portable characters.


2017 ◽  
Vol 87 ◽  
pp. 693-700 ◽  
Author(s):  
Daysi Diaz-Diestra ◽  
Bibek Thapa ◽  
Juan Beltran-Huarac ◽  
Brad R. Weiner ◽  
Gerardo Morell

2018 ◽  
Vol 44 (6) ◽  
pp. 6904-6911 ◽  
Author(s):  
Mohsen Ahmadipour ◽  
Nik Akmar Rejab ◽  
Mohd Fariz Ab Rahman ◽  
Mohd Fadzil Ain ◽  
Zainal Arifin Ahmad

2020 ◽  
Vol 11 (41) ◽  
pp. 6549-6558
Author(s):  
Yohei Miwa ◽  
Mayu Yamada ◽  
Yu Shinke ◽  
Shoichi Kutsumizu

We designed a novel polyisoprene elastomer with high mechanical properties and autonomous self-healing capability at room temperature facilitated by the coexistence of dynamic ionic crosslinks and crystalline components that slowly reassembled.


Author(s):  
Minu Mathew ◽  
Chandra Sekhar Rout

This review details the fundamentals, working principles and recent developments of Schottky junctions based on 2D materials to emphasize their improved gas sensing properties including low working temperature, high sensitivity, and selectivity.


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