Fast and highly sensitive humidity sensors based on NaNbO3 nanofibers

RSC Advances ◽  
2015 ◽  
Vol 5 (26) ◽  
pp. 20453-20458 ◽  
Author(s):  
Youdong Zhang ◽  
Xumin Pan ◽  
Zhao Wang ◽  
Yongming Hu ◽  
Xiaoyuan Zhou ◽  
...  
Keyword(s):  
Room Temperature ◽  
Humidity Sensor ◽  
Temperature Response ◽  
Electrospinning Process ◽  
Humidity Sensors ◽  
Highly Sensitive

A humidity sensor based on NaNbO3 nanofiber networks with fast, ultra-sensitive and selective room-temperature response was fabricated through electrospinning process.

A highly sensitive room temperature humidity sensor based on 2D-WS2 nanosheets

FlatChem ◽  
2018 ◽  
Vol 9 ◽  
pp. 21-26 ◽  
Author(s):  
S.G. Leonardi ◽  
W. Wlodarski ◽  
Y. Li ◽  
N. Donato ◽  
Z. Sofer ◽  
...  
Keyword(s):  
Room Temperature ◽  
Humidity Sensor ◽  
Highly Sensitive ◽  
Ws2 Nanosheets

Vertically Aligned Mn-doped Fe3O4 Nanowire Arrays: Magnetic Properties and Gas Sensing at Room Temperature

2007 ◽  
Vol 1032 ◽  
Author(s):  
Seon Oh Hwang ◽  
Chang Hyun Kim ◽  
Yoon Myung ◽  
Seong-Hun Park ◽  
Jeunghee Park ◽  
...  
Keyword(s):  
Room Temperature ◽  
Humidity Sensor ◽  
Gas Sensing ◽  
Magnetic Circular Dichroism ◽  
Nanowire Arrays ◽  
Triatomic Molecules ◽  
Tetrahedral Sites ◽  
Highly Sensitive ◽  
Vertically Aligned ◽  
Mn Doped

AbstractVertically-aligned Mn (10%)-doped Fe3O4 (Fe2.7Mn0.3O4) nanowire arrays were produced by the reduction/substitution of pre-grown Fe2O3 nanowires. These nanowires were ferromagnetic with a Verwey temperature of 129 K. X-ray magnetic circular dichroism measurements revealed that the Mn2+ ions preferentially occupy the tetrahedral sites, substituting for the Fe3+ ions. We observed that the Mn substitution decreases the magnetization, but increases the electrical conductivity. We developed highly sensitive gas sensors using these nanowire arrays, operating at room temperature, whose sensitivity showed a correlation with their bond strength of diatomic/triatomic molecules. Based on the fact that the sensitivity was highest toward water vapor, an excellent-performance humidity sensor was fabricated.

scholarly journals Highly sensitive, room temperature operated gold nanowire-based humidity sensor: adoptable for breath sensing

RSC Advances ◽  
2022 ◽  
Vol 12 (2) ◽  
pp. 1157-1164
Author(s):  
Parag V. Adhyapak ◽  
Aishwarya M. Kasabe ◽  
Amruta D. Bang ◽  
Jalindar Ambekar ◽  
Sulabha K. Kulkarni
Keyword(s):  
Relative Humidity ◽  
Room Temperature ◽  
Humidity Sensor ◽  
Gold Nanowire ◽  
Humidity Sensing ◽  
Highly Sensitive ◽  
Resistive Sensor ◽  
Relative Humidity Range ◽  
Humidity Range

A novel, highly sensitive gold nanowire (AuNW) resistive sensor is reported here for humidity sensing in the relative humidity range of 11% to 92% RH as well as for breath sensing.

scholarly journals Preparation and Performance Analysis of Ag/ZnO Humidity Sensor

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 857
Author(s):  
Peng Li ◽  
Shuguo Yu ◽  
Hongyan Zhang
Keyword(s):  
Active Sites ◽  
Humidity Sensor ◽  
Molar Ratio ◽  
Water Molecules ◽  
Humidity Sensors ◽  
Response Recovery ◽  
Highly Sensitive ◽  
Stable Performance ◽  
And Performance ◽  
Decomposition Of Water

Highly sensitive silver (Ag) modified zinc oxide (ZnO) humidity sensors were prepared by hydrothermal synthesis and the mechanism was studied. Experimental results show that Ag-modified ZnO can effectively enhance the performance of a humidity sensor. Large number of oxygen vacancies and many active sites are generated on the surface when molar ratio of Ag+ to Zn2+ is 1:100, which can accelerate the decomposition of water molecules on surface of the material, thereby improving the response of humidity sensor. Moreover, the linearity of ZnO humidity sensor is greatly improved by silver nanoparticles. Compared with previously reported ZnO-based humidity sensors, Ag/ZnO humidity sensors have a better response (151,700%), good linearity, low hysteresis (3%), and short response/recovery time (36/6 s). At the same time, it is found that the light had little effect on the performance of Ag/ZnO. Therefore, this kind of ZnO sensor with stable performance and excellent performance is expected to be used in the detection of relative humidity in conventional environments.

Non-covalent functionalization of CNTs with polycarbazole: a chemiresistive humidity sensor with tunable chemo-electric attributes at room temperature

2018 ◽  
Vol 42 (9) ◽  
pp. 6918-6931 ◽  
Author(s):  
Madhurima Das ◽  
Saptarshi Ghosh ◽  
Somenath Roy
Keyword(s):  
Room Temperature ◽  
Humidity Sensor ◽  
Oxidative Polymerization ◽  
Multiwall Carbon Nanotubes ◽  
Chemical Oxidative Polymerization ◽  
Humidity Sensors ◽  
Covalent Functionalization ◽  
Polymerization Method ◽  
Multiwall Carbon

This article describes the non-covalent functionalization of multiwall carbon nanotubes (MWCNTs) with polycarbazole (PCz) via an in situ chemical oxidative polymerization method and subsequent fabrication of resistive humidity sensors.

scholarly journals 2D hybrid networks of gold nanoparticles: mechanoresponsive optical humidity sensors

Nanoscale ◽  
2019 ◽  
Vol 11 (41) ◽  
pp. 19315-19318 ◽  
Author(s):  
Marco A. Squillaci ◽  
Xiaolan Zhong ◽  
Léo Peyruchat ◽  
Cyriaque Genet ◽  
Thomas W. Ebbesen ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Humidity Sensor ◽  
Au Nanoparticles ◽  
Interparticle Distance ◽  
Hybrid Networks ◽  
Humidity Sensors ◽  
Plasmonic Coupling ◽  
Highly Sensitive

2D all-covalent networks of Au nanoparticles, interconnected with hygroscopic organic linkers, act as highly sensitive humidity sensor. The interparticle distance changes in presence of moisture to reversibly trigger plasmonic coupling collectively.

Controlled Growth and Characterization Ag/ZnO Nanotetrapods for Humidity Sensing

2018 ◽  
Vol 21 (7) ◽  
pp. 462-467
Author(s):  
Babak Sadeghi
Keyword(s):  
Room Temperature ◽  
Zinc Complex ◽  
Water Solution ◽  
Particle Morphology ◽  
Quick Response ◽  
Separation System ◽  
Humidity Sensing ◽  
Sensor Material ◽  
Highly Sensitive

Aim and Objective: Ultrafine Ag/ZnO nanotetrapods (AZNTP) have been prepared successfully using silver (I)–bis (oxalato) zinc complex and 1, 3-diaminopropane (DAP) with a phase separation system, and have been injected into a diethyl/water solution. Materials and Methods: This crystal structure and lattice constant of the AZNTP obtained were investigated by means of a SEM, XRD, TEM and UV-vis spectrum. Results: The results of the present study demonstrated the growth and characterization AZNTP for humidity sensing and DAP plays a key role in the determination of particle morphology. AZNTP films with 23 nm in arm diameter have shown highly sensitive, quick response sensor material that works at room temperature.

scholarly journals Dual-mode humidity detection using a lanthanide-based metal–organic framework: towards multifunctional humidity sensors

2017 ◽  
Vol 53 (32) ◽  
pp. 4465-4468 ◽  
Author(s):  
Yuan Gao ◽  
Pengtao Jing ◽  
Ning Yan ◽  
Michiel Hilbers ◽  
Hong Zhang ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Humidity Sensor ◽  
Metal Organic Framework ◽  
Dual Mode ◽  
Humidity Sensors ◽  
Highly Effective ◽  
Metal Organic ◽  
Spectroscopy Studies ◽  
Organic Framework

Combined photoluminescence and impedance spectroscopy studies show that a europium-based metal–organic framework behaves as a highly effective and reliable humidity sensor, enabling dual-mode humidity detection.

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