Humidity Sensing Properties of Screen-printed Carbon-black an Fe(II) Spin Crossover Compound Hybrid Films

Llobet, Eduard; Barbera-Brunet, R.; Etrillard, Céline; Létard, Jean‐François; Debéda, Hélène

doi:10.1016/j.proeng.2014.11.550

Cited by 7 publications

(7 citation statements)

References 6 publications

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“…The formation of carbon occurred with the burnout of PVA in pyrolysis and some residuals were trapped inside the microstructure. Moreover, carbon residuals could be beneficial to enhance sensor's sensitivity, because carbon could endow electrical conductivity on the sample (Llobet et al, 2014). For this reason, several researchers have incorporated multi-wall carbon nanotubes, graphene, carbon black or carbon derived from pyrolysis to measure humidity (Tulliani et al, 2019).…”

Section: Density Resultsmentioning

confidence: 99%

Fabrication of bulk alumina structures with humidity sensing capabilities using direct ink write technique

Renteria

García

Diaz

et al. 2021

RPJ

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Purpose The purpose of this study is to evaluate different 3D structures for humidity sensing that will enable the fabrication of complex geometries with high moisture sensitivity. Design/methodology/approach Humidity sensors based on alumina ceramics were fabricated using direct ink write (DIW) technique. Different engineered surface area, polymer binder ratio and post-processing treatment were considered to increase moisture sensitivity. Findings It was found that the binder ratio plays an important role in controlling the rheology of the paste during printing and determining the pore size after post-processing treatment. The sensibility of the fabricated humidity sensor was investigated by measuring its capacitance response toward relative humidity (RH) varying from 40% to 90% RH at 25°C. It is shown that using 3D lattice design, printed alumina humidity sensor could improve sensitivity up to 31.6 pF/RH%, over an order of magnitude higher than solid alumina. Originality/value Most of the alumina humidity sensors available are films in nature because of manufacturing difficulties, which limited its potential of higher sensitivity, and thus broader applications. In this paper, a novel 3D alumina humidity sensor was fabricated using DIW 3D printing technology.

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Section: Density Resultsmentioning

confidence: 99%

Fabrication of bulk alumina structures with humidity sensing capabilities using direct ink write technique

Renteria

García

Diaz

et al. 2021

RPJ

View full text Add to dashboard Cite

show abstract

“…Carbon black (CB) impairs electrical conductivity to the film which, at high RH levels, swells and increases the resistance of the film. In [62], films of CB and the Fe[(Htrz) 2 (trz)]BF 4 complex (where Htrz = 1,2,4-1H-triazole and trz is the deprotonated triazole ligand) were screen-printed. The nanoparticles were realized by a reverse micelle method and had an average diameter of 45 nm.…”

Section: Sensing Materialsmentioning

confidence: 99%

Carbon-Based Materials for Humidity Sensing: A Short Review

2019

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Humidity sensors are widespread in many industrial applications, ranging from environmental and meteorological monitoring, soil water content determination in agriculture, air conditioning systems, food quality monitoring, and medical equipment to many other fields. Thus, an accurate and reliable measurement of water content in different environments and materials is of paramount importance. Due to their rich surface chemistry and structure designability, carbon materials have become interesting in humidity sensing. In addition, they can be easily miniaturized and applied in flexible electronics. Therefore, this short review aims at providing a survey of recent research dealing with carbonaceous materials used as capacitive and resistive humidity sensors. This work collects some successful examples of devices based on carbon nanotubes, graphene, carbon black, carbon fibers, carbon soot, and more recently, biochar produced from agricultural wastes. The pros and cons of the different sensors are also discussed in the present review.

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“…Avec cette encre modifiée RS12113, des couches de 15 mm de long sur 3 mm de large ont été imprimées sur un substrat d'alumine. Après l'impression, l'encre résistive est séchée 20 min à 120°C puis polymérisée 6 min à 230°C dans un équipement phase vapeur [8]. La couche finale polymérisée a une épaisseur d'environ 20µm.…”

Section: Capteurs D'humiditéunclassified

Vers l’électronique imprimée à l’IMS Bordeaux - plateforme technologique TAMIS (Technologies Alternatives aux MIcrosystèmes Silicium)

Debéda

Fadel

Favre

et al. 2015

J3eA

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Humidity Sensing Properties of Screen-printed Carbon-black an Fe(II) Spin Crossover Compound Hybrid Films

Cited by 7 publications

References 6 publications

Fabrication of bulk alumina structures with humidity sensing capabilities using direct ink write technique

Fabrication of bulk alumina structures with humidity sensing capabilities using direct ink write technique

Carbon-Based Materials for Humidity Sensing: A Short Review

Vers l’électronique imprimée à l’IMS Bordeaux - plateforme technologique TAMIS (Technologies Alternatives aux MIcrosystèmes Silicium)

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