Synthesis of PSi-n/CuO-p/Cu2O-n heterostructure for CO2 gas sensing at room temperature

Bouachma, Soraya; Ayouz-Chebout, Katia; Kechouane, M.; Manseri, A.; Yaddadene, Chafiaa; Menari, H.; Gabouze, N.

doi:10.1007/s00339-021-05167-4

Cited by 17 publications

(7 citation statements)

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“…However, to date, there is no study available in the literature about the humiditysensing applications of Cu 2 O nanoparticles. Therefore, an extensive study is required to understand the role of Cu 2 O nanoparticles in humidity-sensing devices [24,25]. The physical properties-bandgaps, nanostructures, surface-to-volume ratio, etc.-of Cu 2 O nanoparticles are greatly dependent on their particles sizes, shapes, and morphology.…”

Section: Introductionmentioning

confidence: 99%

Cuprous Oxide Nanoparticles: Synthesis, Characterization, and Their Application for Enhancing the Humidity-Sensing Properties of Poly(dioctylfluorene)

et al. 2022

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In this paper, we report on the synthesis—via the wet chemical precipitation route method—and thin film characteristics of inorganic semiconductor, cuprous oxide (Cu2O) nanoparticles, for their potential application in enhancing the humidity-sensing properties of semiconducting polymer poly(9,9-dioctylfluorene) (F8). For morphological analysis of the synthesized Cu2O nanoparticles, transmission electron microscope (TEM) and scanning electron microscope (SEM) micrographs are studied to investigate the texture, distribution, shape, and sizes of Cu2O crystallites. The TEM image of the Cu2O nanoparticles exhibits somewhat non-uniform distribution with almost uniform shape and size having an average particle size of ≈24 ± 2 nm. Fourier transformed infrared (FTIR) and X-ray diffraction (XRD) spectra are studied to validate the formation of Cu2O nanoparticles. Additionally, atomic force microscopy (AFM) is performed to analyze the surface morphology of polymer-inorganic (F8-Cu2O) nanocomposites thin film to see the grain sizes, mosaics, and average surface roughness. In order to study the enhancement in sensing properties of F8, a hybrid organic–inorganic (F8-Cu2O) surface-type humidity sensor Ag/F8-Cu2O/Ag is fabricated by employing F8 polymer as an active matrix layer and Cu2O nanoparticles as a dopant. The Ag/F8-Cu2O/Ag device is prepared by spin coating a 10:1 wt% solution of F8-Cu2O nanocomposite on pre-patterned silver (Ag) electrodes on glass. The inter-electrode gap (≈5 μm) between Ag is developed by photolithography. To study humidity sensing, the Ag/F8-Cu2O/Ag device is characterized by measuring its capacitance (C) as a function of relative humidity (%RH) at two different frequencies (120 Hz and 1 kHz). The device exhibits a broad humidity sensing range (27–86%RH) with shorter response time and recovery time, i.e., 9 s and 8 s, respectively. The present results show significant enhancement in the humidity-sensing properties as compared to our previously reported results of Ag/F8/Ag sensor wherein the humidity sensing range was 45–78%RH with 15 s and 7 s response and recovery times, respectively. The improvement in the humidity-sensing properties is attributed to the potential use of Cu2O nanoparticles, which change the hydrophobicity, surface to volume ratio of Cu2O nanoparticles, as well as modification in electron polarizability and polarity of the F8 matrix layer.

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Section: Introductionmentioning

confidence: 99%

Cuprous Oxide Nanoparticles: Synthesis, Characterization, and Their Application for Enhancing the Humidity-Sensing Properties of Poly(dioctylfluorene)

et al. 2022

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“…Other sensing materials including SnO 2 , 179 TiO 2 , 180 CeO 2 , 181 CuO, 182,183 In 2 O 3 , 184 rare-earth oxycarbonates and oxides, 185 bismuth oxide (Bi 2 O 3 ), 186 and tungsten disulfide (WS 2 ) 187 have been explored for CO 2 sensing. In a study by Zito et al , yolk–shell CeO 2 nanoparticles with high surface area and enhanced gas diffusion were explored for CO 2 sensing.…”

Section: Nanosensors For Critical Gases In the Coal Minesmentioning

confidence: 99%

Gas nanosensors for health and safety applications in mining

Baharfar,

Lin,

Kilani

et al. 2023

Nanoscale Adv.

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“…It showed the highest sensitivities from 500-5000 ppm under various relative humidity levels of 30 to 70% RH at RT. The fabrication of the sensing layer in an n-PSi/p-CuO/n-Cu 2 O bilayer heterostructure might be promising for CO 2 gas sensing [94]. The fabricated sensing layer was characterized at RT, showing sensitivity and reproducibility behavior.…”

Section: Recent Advances In Co 2 Gas Sensorsmentioning

confidence: 99%

Gases in Food Production and Monitoring: Recent Advances in Target Chemiresistive Gas Sensors

2022

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The rapid development of the human population has created demand for an increase in the production of food in various fields, such as vegetal, animal, aquaculture, and food processing. This causes an increment in the use of technology related to food production. An example of this technology is the use of gases in the many steps of food treatment, preservation, processing, and ripening. Additionally, gases are used across the value chain from production and packaging to storage and transportation in the food and beverage industry. Here, we focus on the long-standing and recent advances in gas-based food production. Although many studies have been conducted to identify chemicals and biological contaminants in foodstuffs, the use of gas sensors in food technology has a vital role. The development of sensors capable of detecting the presence of target gases such as ethylene (C2H4), ammonia (NH3), carbon dioxide (CO2), sulfur dioxide (SO2), and ethanol (C2H5OH) has received significant interest from researchers, as gases are not only used in food production but are also a vital indicator of the quality of food. Therefore, we also discuss the latest practical studies focused on these gases in terms of the sensor response, sensitivity, working temperatures, and limit of detection (LOD) to assess the relationship between the gases emitted from or used in foods and gas sensors. Greater interest has been given to heterostructured sensors working at low temperatures and flexible layers. Future perspectives on the use of sensing technology in food production and monitoring are eventually stated. We believe that this review article gathers valuable knowledge for researchers interested in food sciences and sensing development.

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Synthesis of PSi-n/CuO-p/Cu2O-n heterostructure for CO2 gas sensing at room temperature

Cited by 17 publications

References 50 publications

Cuprous Oxide Nanoparticles: Synthesis, Characterization, and Their Application for Enhancing the Humidity-Sensing Properties of Poly(dioctylfluorene)

Cuprous Oxide Nanoparticles: Synthesis, Characterization, and Their Application for Enhancing the Humidity-Sensing Properties of Poly(dioctylfluorene)

Gas nanosensors for health and safety applications in mining

Gases in Food Production and Monitoring: Recent Advances in Target Chemiresistive Gas Sensors

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