Preparation of nickel oxide thin films for gas sensors applications

Hotovy, I.; Huran, J.; Spieß, Lothar; Hašc̆ı́k, Š.; Řeháček, V.

doi:10.1016/s0925-4005(99)00077-5

Cited by 201 publications

(74 citation statements)

References 7 publications

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“…3,4 The intrinsic p-type conductivity of NiO x is mainly related to its non-stoichiometric nature where Ni 3+ centers constitute the oxide defects through which holes are transferred. 5 Because of this interesting combination of electrical and optical properties, NiO x has been considered for energy storage applications, [6][7][8] in electrochromic devices as transparent electrode, 9-17 in optoelectronic devices as electron barrier, 18,19 for gas sensing, 20,21 and, more recently, in dye-sensitized solar cells (DSCs) as photoactive cathode. [22][23][24][25][26][27][28][29][30][31][32][33][34][35] The utilization of NiO x in such diverse applications has been accompanied by the development of various preparation methods and deposition techniques, aimed at producing NiO x -based materials with variable chemical composition, electrical resistivity, compactness and morphology.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical characterization of NiO electrodes deposited via a scalable powder microblasting technique

Awais

Dini

MacElroy

et al. 2013

Journal of Electroanalytical Chemistry

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Publication information Journal of Electroanalytical Chemistry, Publisher Elsevier The UCD community has made this article openly available. Please share how this access benefits you. Your story matters! (@ucd_oa) Some rights reserved. For more information, please see the item record link above. In this contribution a novel powder coating processing technique (microblasting) for the fabrication of nickel oxide (NiOx) coatings is reported. ∼1.2 μm thick NiOx coatings are deposited at 20 mm2 s−1 by the bombardment of the NiOx powder onto a Ni sheet using an air jet at a speed of more than 180 m s−1. Microblast deposited NiOx coatings can be prepared at a high processing rate, do not need further thermal treatment. Therefore, this scalable method is time and energy efficient. The mechano-chemical bonding between the powder particles and substrate results in the formation of strongly adherent NiOx coatings. Microstructural analyses were carried out using SEM, the chemical composition and coatings orientation were determined by XPS and XRD, respectively. The electroactivity of the microblast deposited NiOx coatings was compared with that of NiOx coatings obtained by sintering NiOx nanoparticles previously sprayed onto Ni sheets. In the absence of a redox mediator in the electrolyte, the reduction current of microblast deposited NiOx coatings, when analyzed in anhydrous environment, was two times larger than that produced by higher porosity NiOx nanoparticles coatings of the same thickness obtained through spray coating followed by sintering. Under analogous experimental conditions thin layers of NiOx obtained by using the sol-gel method, ultrasonic spray-and electro-deposition show generally lower current density with respect to microblast samples of the same thickness. The electrochemical reduction of NiOx coatings is controlled by the bulk characteristics of the oxide and the relatively ordered structure of microblast NiOx coatings with respect to sintered NiOx nanoparticles here considered, is expected to increase the electron mobility and ionic charge diffusion lengths in the microblast samples. Finally, the increased level of adhesion of the microblast film on the metallic substrate affords a good electrical contact at the metal/metal oxide interface, and constitutes another reason in support of the choice of microblast as low-cost and scalable deposition method for oxide layers to be employed in electrochemical applications. Electrochemical characterization of NiO electrodes deposited via a scalable powder microblasting technique

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Section: Introductionmentioning

confidence: 99%

Electrochemical characterization of NiO electrodes deposited via a scalable powder microblasting technique

Awais

Dini

MacElroy

et al. 2013

Journal of Electroanalytical Chemistry

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“…Nickel Oxide has been used as a gas sensing application as thin films also. [8][9]. Nickel Oxide is also used in Battery application with wide variety of variations and domains [10][11][12]With the wide variety of application of Nickel Oxide, the Nanoparticles have been selected and incorporated in determining its mechanical properties with respect to temperature, with the study of this dual performance we can try to evolve a facile composite which could have distinct property in applications.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Mechanical Properties of Effect of Nickel Oxide Nanoparticles in Polyester based Nanocomposites.

S¹

2018

IJRASET

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This paper describes the methodology of preparing nanocomposites using nickel oxide (Toxic) Nanoparticles in determined amounts in polyester resin and studying their properties for Dynamic Mechanical Analysis. The study provides major importance of the composites with weight loss, storage modulus and Tan delta results. These results provide major insight to the material behaviour in elevated temperatures and how the composites behave. The Nanoparticles filler and matrix bonding acts as major influencing parameter for the material performance. The graphs show uniform distribution of particles in matrix. The material has a significant percentage of combination that attributes to the best combination. The SEM and EDAX readings are also performed and results are discussed.

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“…Nickel oxide is a transition metal oxide, P-type semiconductor with a wide energy gap of 3.6 eV-4 eV [3]. It is used widely in manufacturing magnetic materials [4,5], alkaline battery cathodes [6], dye-sensitized solar cells, semiconductors, solid oxide fuel cells, anti-ferromagnetic layers [7], P-type transparent conducting films, electro chromic films, heterogeneous catalytic materials and gas sensors [8]. Currently some noble metal nanoparticles such as gold and silver are used as antimicrobial agents.…”

Section: Introductionmentioning

confidence: 99%

Effect of Calcination Time on Structural, Optical and Antimicrobial Properties of Nickel Oxide Nanoparticles

Br¹,

Xr²

2016

J Theor Comput Sci

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Nickel oxide nano crystallites were synthesized using Nickel [II] Chloride and Sodium hydroxide. The Thermo Gravimetric and Differential Thermo gravimetric (TGA/DTA) analysis were done to study the thermal behavior of the as synthesized sample Ni(OH)2. The peak at 290°C in DTA may be related to the decomposition of Ni(OH)2 into NiO. The structural, optical properties, morphology and composition of NiO nano particles (NPs) were studied by various techniques such as XRD, FTIR, UV-Vis, PL, FESEM and EDAX. The antimicrobial activity were carried out against Gram positive and Gram negative bacteria and NiO NPs showed inhibitory activity in both strains of bacteria with excellent selectivity against Gram-positive bacteria.

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Preparation of nickel oxide thin films for gas sensors applications

Cited by 201 publications

References 7 publications

Electrochemical characterization of NiO electrodes deposited via a scalable powder microblasting technique

Electrochemical characterization of NiO electrodes deposited via a scalable powder microblasting technique

Dynamic Mechanical Properties of Effect of Nickel Oxide Nanoparticles in Polyester based Nanocomposites.

Effect of Calcination Time on Structural, Optical and Antimicrobial Properties of Nickel Oxide Nanoparticles

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