TiO2 nanoflowers based humidity sensor and cytotoxic activity

A flexible humidity sensor has been realized based on Co3O4 nanoneedles via a deposition technique. High humidity sensing and excellent flexible properties are observed in the tests. The impedance of the as-prepared sensor decreases by nearly three orders of magnitude with increasing relative humidity (RH) from 11% to 95% on a semilogarithmic scale. The response and recovery times are about 3 and 6 s respectively. The maximum hysteresis is less than 4% under 80% RH. No obvious changes for the sensing performance can be obtained after 100 bending/extending cycles and bending tests. These performances make the current sensor a good candidate for flexible humidity detection.

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Humidity sensing performance of mesoporous CoO(OH) synthesized via one-pot hydrothermal method

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2018.10.058 ◽

2019 ◽

Vol 280 ◽

pp. 46-53 ◽

Cited By ~ 7

Author(s):

Shan Zhang ◽

Wangchang Geng ◽

Xiaowei He ◽

Jinchun Tu ◽

Mingliang Ma ◽

...

Keyword(s):

Hydrothermal Method ◽

One Pot ◽

Humidity Sensing ◽

Sensing Performance

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Humidity Sensing Performance of V: TiO2 3D Nanostructure-based Humidity Sensor

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/682/1/012073 ◽

2021 ◽

Vol 682 (1) ◽

pp. 012073

Author(s):

M Z Musa ◽

M H Mamat ◽

N Vasimalai ◽

I B Shameem Banu ◽

N Parimon ◽

...

Keyword(s):

Humidity Sensor ◽

Humidity Sensing ◽

3D Nanostructure ◽

Sensing Performance

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Fully inkjet-printed BaTiO3 capacitive humidity sensor: microstructural engineering of the humidity sensing layer using bimodal ink

Ceramics International ◽

10.1016/j.ceramint.2021.05.191 ◽

2021 ◽

Author(s):

Frances Danielle M. Fernandez ◽

Murali Bissannagari ◽

Jihoon Kim

Keyword(s):

Humidity Sensor ◽

Humidity Sensing ◽

Capacitive Humidity Sensor

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Synthesis of ZnO/NiO hollow spheres and their humidity sensing performance

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2021.160487 ◽

2021 ◽

pp. 160487

Author(s):

Xiu-Juan Xie ◽

Ren-Jun Si ◽

Jun Zheng ◽

Kai Wei ◽

Xiu-Ying Zheng ◽

...

Keyword(s):

Hollow Spheres ◽

Humidity Sensing ◽

Sensing Performance

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Wide range and highly linear signal processed systematic humidity sensor array using Methylene Blue and Graphene composite

Scientific Reports ◽

10.1038/s41598-021-95977-6 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Muhammad Umair Khan ◽

Gul Hassan ◽

Rayyan Ali Shaukat ◽

Qazi Muhammad Saqib ◽

Mahesh Y. Chougale ◽

...

Keyword(s):

Methylene Blue ◽

Linear Combination ◽

Linear Function ◽

Humidity Sensor ◽

Sensor Array ◽

Combination Method ◽

Humidity Sensing ◽

Sensing Applications ◽

Wide Range ◽

Graphene Flakes

AbstractThis paper proposes a signal processed systematic 3 × 3 humidity sensor array with all range and highly linear humidity response based on different particles size composite inks and different interspaces of interdigital electrodes (IDEs). The fabricated sensors are patterned through a commercial inkjet printer and the composite of Methylene Blue and Graphene with three different particle sizes of bulk Graphene Flakes (BGF), Graphene Flakes (GF), and Graphene Quantum Dots (GQD), which are employed as an active layer using spin coating technique on three types of IDEs with different interspaces of 300, 200, and 100 µm. All range linear function (0–100% RH) is achieved by applying the linear combination method of nine sensors in the signal processing field, where weights for linear combination are required, which are estimated by the least square solution. The humidity sensing array shows a fast response time (Tres) of 0.2 s and recovery time (Trec) of 0.4 s. From the results, the proposed humidity sensor array opens a new gateway for a wide range of humidity sensing applications with a linear function.

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