Fabrication and study of self-assembled NiO surface networks assisted by Sn doping

Taeño, María; Maestre, David; Cremades, Ana

doi:10.1016/j.jallcom.2020.154172

Cited by 13 publications

(4 citation statements)

References 42 publications

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“…Considering that NiO is a p-type semiconductor, the reported sensing mechanism is based on the formation of hole accumulation due to oxygen (O 2 ) adsorption. 16 Furthermore, non-stoichiometric NiO is acknowledged as having a hole conductivity due to Ni 2+ cationic vacancies and O 2 interstitial defects. 34 A higher hole concentration is generated when higher Ni 2+ cationic vacancies and Ni 3+ ions (acceptor) are created in the film.…”

Section: Resultsmentioning

confidence: 99%

“…12 In addition, the performance of several other applications of NiO, such as electrochromic devices 13 and perovskite solar cells, 14 was also improved by doping. Various metals have been investigated as dopants, including Al, 4,15 Zn, 13 Li, 14 Sn 16 and Mn, 17,18 to improve the properties of NiO. In particular, the combination of Mn with NiO has attracted significant attention due to its distinctive magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

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Annealing temperature dependency of structural, optical and electrical characteristics of manganese-doped nickel oxide nanosheet array films for humidity sensing applications

Parimon

Mamat

Banu

et al. 2021

Nanomaterials and Nanotechnology

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Manganese-doped nickel oxide nanosheet array films are successfully prepared on a nickel oxide seed-coated glass substrate by an immersion method. Various annealing temperatures between 300°C and 500°C are applied to the manganese-doped nickel oxide nanosheet array films to study their effect on the properties of nickel oxide, including humidity sensing performance. Field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), ultraviolet–visible (UV–vis) spectrophotometry, a two-probe current–voltage ( I- V) measurement system and a humidity measurement system are used to characterise the heat-treated manganese-doped nickel oxide samples. The effect of annealing temperature can be clearly observed for the different surface morphologies and diffraction patterns. The samples exhibit average crystallite size increases of 0.63–10.13 nm with increasing annealing temperature. The dislocation density, interplanar spacing, lattice parameter, unit cell volume and stress/strain are also determined from the XRD data. The average transmittances in the visible region for all samples show low percentages with the highest transparency of 50.7% recorded for manganese-doped nickel oxide annealed at 500°C. The optical band gap shows a decreasing trend with increasing annealing temperature. The I- V measurement results reveal that manganese-doped nickel oxide displays improved conductivity values with increasing annealing temperature. The sensitivity of the humidity sensors shows an ascending curve with increasing temperature. The optimal device performance is obtained with annealing at 500°C, with the highest sensitivity of 270 and the fastest response and recovery times. In contrast, the sample for annealing at 300°C shows poor sensing performance.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Annealing temperature dependency of structural, optical and electrical characteristics of manganese-doped nickel oxide nanosheet array films for humidity sensing applications

Parimon

Mamat

Banu

et al. 2021

Nanomaterials and Nanotechnology

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“…Furthermore, doping induces lattice distortion and introduces more oxygen vacancy defects. When detecting ethanol, ethanol molecules are easily trapped by oxygen vacancy defects, allowing more target molecules to react with NiO, resulting in a larger gas response [85][86][87]. Shailja et al [88] introduced Ga 3+ into NiO.…”

Section: Cation Dopingmentioning

confidence: 99%

NiO-Based Gas Sensors for Ethanol Detection: Recent Progress

Zeng

2022

Journal of Sensors

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In this review, we summarized the state-of-the-art progress on the ethanol performance of NiO by means of morphology, doping, loading noble metal particles, and forming heterojunctions. We first introduced the effect of modulating NiO morphology on ethanol performance that has been reported in recent years. The morphology with large specific surface area and high porosity was considered to be the one that can bring high gas response. Then, we discussed the enhanced effect of the doping of metal cations and noble metal particle loading on the ethanol-sensitive properties of NiO. Doping ions increased the ground-state resistance and increased the oxygen defect concentration of NiO. The effects of noble metal particles on the performance of NiO included chemical sensitization and electronic sensitization. Finally, the related contents of NiO forming complexes with metal oxides and bimetallic oxides were discussed. In this section, the specific improvement mechanism was discussed first, and then, the related work of researchers in recent years was summarized. At the same time, we presented a reasonable outlook for NiO-based ethanol sensors, imagining future directions.

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“…In that sense, diverse microscopy and spectroscopy techniques have been employed in the study of the samples to get insights in the morphology, structure, and composition as a function of the thermal treatments. Besides, considering the possible precipitation of NiO at high temperatures and taking into account that NiO is one of the few p-type oxides, 20 in this work, the formation and study of NiO-NiMn 2 O 4 will be also considered, due to the potential interest and applicability of these p−n heterostructures in sensing, photocatalysis, and energy storage systems, among others.…”

Section: Introductionmentioning

confidence: 99%

Study of NiO-NiMn₂O₄-Patterned Surfaces Fabricated by a Vapor–Solid Process

García-Alonso,

Amati,

Cremades

et al. 2024

Crystal Growth & Design

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Nickel manganite (NiMn 2 O 4 ) samples synthesized by a vapor−solid method at temperatures in the range of 1000− 1400 °C are studied in this work. The stability and properties of this ternary compound together with the presence of NiO in the form of p−n heterostructures have been analyzed by means of diverse electron microscopy and spectroscopy techniques. The formation of the ternary compound with improved crystallinity is promoted as the temperature of the synthesis is increased. Moreover, the samples synthesized at higher temperatures exhibit the growth of microcrystals with micro-and nanoislands on top of their lateral surfaces, leading to patterned surfaces with variable Ni and Mn composition. The combination of Raman spectroscopy, including wavenumber-filtered images, and electron backscattered diffraction confirms that most of these micro-and nanoislands consist of NiMn 2 O 4 grown on top of NiO surfaces. X-Ray photoelectron spectroscopy and microscopy at synchrotron facilities confirm the presence of nickel manganite nanoislands covering the surface of NiO surfaces. Aspects such as the growth mechanisms, nickel manganite vibrational modes, and inversion factor of NiMn 2 O 4 have been discussed in this work.

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Fabrication and study of self-assembled NiO surface networks assisted by Sn doping

Cited by 13 publications

References 42 publications

Annealing temperature dependency of structural, optical and electrical characteristics of manganese-doped nickel oxide nanosheet array films for humidity sensing applications

Annealing temperature dependency of structural, optical and electrical characteristics of manganese-doped nickel oxide nanosheet array films for humidity sensing applications

NiO-Based Gas Sensors for Ethanol Detection: Recent Progress

Study of NiO-NiMn₂O₄-Patterned Surfaces Fabricated by a Vapor–Solid Process

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Fabrication and study of self-assembled NiO surface networks assisted by Sn doping

Cited by 13 publications

References 42 publications

Annealing temperature dependency of structural, optical and electrical characteristics of manganese-doped nickel oxide nanosheet array films for humidity sensing applications

Annealing temperature dependency of structural, optical and electrical characteristics of manganese-doped nickel oxide nanosheet array films for humidity sensing applications

NiO-Based Gas Sensors for Ethanol Detection: Recent Progress

Study of NiO-NiMn2O4-Patterned Surfaces Fabricated by a Vapor–Solid Process

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Study of NiO-NiMn₂O₄-Patterned Surfaces Fabricated by a Vapor–Solid Process