p-Type copper aluminum oxide thin films for gas-sensing applications

Baratto, C.; Kumar, Raghvendra; Faglia, Guido; Vojisavljević, Katarina; Malič, Barbara

doi:10.1016/j.snb.2014.11.116

Cited by 41 publications

(15 citation statements)

References 33 publications

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“…Moreover, Fig. 9b shows the actual resistance values of ZnFe 2 O 4 nanoparticles for different acetone concentrations at 200 • C. The resistance values in air are not too high as compared with the reported works [41,42].…”

Section: Gas-sensing Propertiessupporting

confidence: 63%

ZnFe2O4 nanoparticles: Synthesis, characterization, and enhanced gas sensing property for acetone

Zhang

Song

Niu

et al. 2015

Sensors and Actuators B: Chemical

155

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a b s t r a c tZnFe 2 O 4 nanoparticles with diameter of ca.10 nm were successfully synthesized under hydrothermal conditions without using any surfactant or structure-directing agents. The structure, composition and morphology of the samples were characterized by means of powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), diffuse reflectance spectra (DRS) and the Brunauer-Emmett-Teller (BET) surface area measurement. The results showed that the mole ratio of reactants ZnO to FeCl 3 played an important role in controlling the composition and morphology of the products. BET specific surface area of ZnFe 2 O 4 nanoparticles was evaluated to be 115.6 m 2 g −1 . Interestingly, as-prepared ZnFe 2 O 4 nanoparticles displayed enhanced gas sensing performance to acetone, which response value reached 39.5 for 200 ppm acetone gas at lower optimum working temperature of 200 • C, in comparison with the precursor ZnO (4.2) at the same condition. The gas sensing property demonstrates that as-prepared ZnFe 2 O 4 has potential applications in the detection of acetone.

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Section: Gas-sensing Propertiessupporting

confidence: 63%

ZnFe2O4 nanoparticles: Synthesis, characterization, and enhanced gas sensing property for acetone

Zhang

Song

Niu

et al. 2015

Sensors and Actuators B: Chemical

155

View full text Add to dashboard Cite

show abstract

“…Also, the structural features, electrical characteristics and gas sensing applications of polymeric copper/alumina hybrid nanocomposite has been reported by Sankar et al [21]. Another study conducted by using the p-Type copper aluminum oxide thin films for gas-sensing applications has been reported by Baratto et al [22].…”

Section: Introductionmentioning

confidence: 91%

New Construction of Functionalized CuO/Al2O3 Nanocomposite-Based Polymeric Sensor for Potentiometric Estimation of Naltrexone Hydrochloride in Commercial Formulations

2021

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Electrically conductive polymeric nanocomposites with nanoparticles are adaptable types of nanomaterials that are prospective for various applications. The extraordinary features of copper oxide (CuO) and aluminium oxide (Al2O3) nanostructures, encourages extensive studies to prospect these metal oxide nanocomposites as potential electroactive materials in sensing and biosensing applications. This study suggested a new CuO/Al2O3 nanocomposite-based polymeric coated wire membrane sensor for estimating naltrexone hydrochloride (NTX) in commercial formulations. Naltrexone hydrochloride and sodium tetraphenylborate (Na-TPB) were incorporated in the presence of polymeric polyvinyl chloride (PVC) and solvent mediator o-nitrophenyloctyl ether (o-NPOE) to form naltrexone tetraphenylborate (NTX-TPB) as an electroactive material. The modified sensor using NTX-TPB-CuO/Al2O3 nanocomposite displayed high selectivity and sensitivity for the discrimination and quantification of NTX with a linearity range 1.0 × 10−9–1.0 × 10−2 mol L−1 and a regression equation EmV = (58.25 ± 0.3) log [NTX] + 754.25. Contrarily, the unmodified coated wire sensor of NTX-TPB exhibited a Nernstian response at 1.0 × 10−5–1.0 × 10−2 mol L−1 and a regression equation EmV = (52.1 ± 0.2) log [NTX] + 406.6. The suggested modified potentiometric system was validated with respect to various criteria using the methodology recommended guidelines.

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“…To date, various spinel oxides have been explored to design new gas sensors, [ 178,179 ] and the results in the literature are summarized in Table 2 . [ 180–222 ] Note that a number of different gases can be detected using spinel oxides. Furthermore, considering that research on spinel‐based gas sensing materials is still in the nascent stage, more gas sensing materials with different or new performance due to compositional variation are expected to be found.…”

Section: Multinary Oxides (Perovskite and Spinel)mentioning

confidence: 99%

Rational Design of Semiconductor‐Based Chemiresistors and their Libraries for Next‐Generation Artificial Olfaction

2020

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With rapid progress in device integration and computing power, the realization of highly miniaturized one-chip artificial olfaction with superior performance is close and should be further supported by the rational design of chemical sensors and chemical sensing materials. The number of gas sensors tends to increase in order to sniff more complex odors with the progress of civilization. This explains the evolution from a single chemical sensor to complicated artificial olfaction using sensor arrays. At the advent of oxide chemiresistive gas sensors in the 1960s and 1970s, a single gas sensor was widely used to detect toxic, explosive, dangerous, and harmful gases, such as CO, C 3 H 8 , CH 4 , H 2 S, and NO 2 , in a selective manner. [26,27] However, a single sensor is often insufficient for recognizing most of the natural odors encountered in daily life, which consist of hundreds to thousands of different chemicals. [28] In the mammalian olfactory system, odorants are initially detected by olfactory receptors (ORs) covering the surface of the cilia projected from olfactory sensory neurons (OSNs), which are located in the olfactory epithelium lining the nasal cavity. These signals are transmitted to the glomeruli in the olfactory bulb, where a high degree of signal integration happens (Figure 1a). [29] Finally, the signals are sent through mitral cells to a higher brain region (olfactory cortex), and the signals are subsequently combined or modified in a variety of ways by parallel processing for analysis and interpretation (Figure 1b). [30] Each OR can detect various kinds of odorants, and similarly, each odorant can also be recognized by a number of ORs. That is, the olfactory system determines multiple odorants from various combinations of ORs (Figure 1c). [31] For better olfaction, both OSNs and ORs should be abundant. A larger number of OSNs is advantageous for detecting trace concentrations of analytes and ligands. [32] For instance, dogs with more OSNs are better than humans at detecting explosives, searching and rescuing, diagnosing disease, and assessing agricultural products. [33] If a mammal can detect larger numbers of faint gas components within odors, he can perceive and identify the odors more accurately. From this perspective, gas sensors with lower detection limits would be assembled to the stronger artificial olfaction. Kinds of ORs are also important. Mammals are known to have ≈1000 different kinds of ORs, and combinations of dissimilar ORs enable the discrimination of a myriad of odorants. [29] To mimic this, sensor arrays consisting of small number (5-20) of sensors that show Artificial olfaction based on gas sensor arrays aims to substitute for, support, and surpass human olfaction. Like mammalian olfaction, a larger number of sensors and more signal processing are crucial for strengthening artificial olfaction. Due to rapid progress in computing capabilities and machinelearning algorithms, on-demand high-performance artificial olfaction that can eclipse human olfaction becomes inevitable onc...

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p-Type copper aluminum oxide thin films for gas-sensing applications

Cited by 41 publications

References 33 publications

ZnFe2O4 nanoparticles: Synthesis, characterization, and enhanced gas sensing property for acetone

ZnFe2O4 nanoparticles: Synthesis, characterization, and enhanced gas sensing property for acetone

New Construction of Functionalized CuO/Al2O3 Nanocomposite-Based Polymeric Sensor for Potentiometric Estimation of Naltrexone Hydrochloride in Commercial Formulations

Rational Design of Semiconductor‐Based Chemiresistors and their Libraries for Next‐Generation Artificial Olfaction

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