Transition metal (Co, Mn) co-doped ZnO nanoparticles: Effect on structural and optical properties

Sharma, Darshan; Jha, Ranjana

doi:10.1016/j.jallcom.2016.12.227

Cited by 181 publications

(53 citation statements)

References 46 publications

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“…Overall, the aforementioned usages are strongly dependent on the chemical and physical properties of ZnO. Thus, according to the targeted application, transition metals (e.g., Mn, Co, Fe, Cu) and transition metal oxides (e.g., Cu x O x , Co x O x , Fe x O x ) have been introduced as second-phase modifier materials in ZnO films to tune its electrical, optical and magnetic properties [4,[6][7][8][9]. Similarly, the modification of ZnO with organic agents such as octadecylphosphonic acid (ODP) or alkanoic acids, as well as inorganic metal oxides such as cuprous oxide (Cu 2 O), has also been explored to improve its wettability [10][11][12][13] and sensing properties [14,15].…”

Section: Introductionmentioning

confidence: 99%

AACVD Synthesis and Characterization of Iron and Copper Oxides Modified ZnO Structured Films

et al. 2020

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Non-modified (ZnO) and modified (Fe2O3@ZnO and CuO@ZnO) structured films are deposited via aerosol assisted chemical vapor deposition. The surface modification of ZnO with iron or copper oxides is achieved in a second aerosol assisted chemical vapor deposition step and the characterization of morphology, structure, and surface of these new structured films is discussed. X-ray photoelectron spectrometry and X-ray diffraction corroborate the formation of ZnO, Fe2O3, and CuO and the electron microscopy images show the morphological and crystalline characteristics of these structured films. Static water contact angle measurements for these structured films indicate hydrophobic behavior with the modified structures showing higher contact angles compared to the non-modified films. Overall, results show that the modification of ZnO with iron or copper oxides enhances the hydrophobic behavior of the surface, increasing the contact angle of the water drops at the non-modified ZnO structures from 122° to 135° and 145° for Fe2O3@ZnO and CuO@ZnO, respectively. This is attributed to the different surface properties of the films including the morphology and chemical composition.

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Section: Introductionmentioning

confidence: 99%

AACVD Synthesis and Characterization of Iron and Copper Oxides Modified ZnO Structured Films

et al. 2020

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“…In the present work, optical band gaps of AuNPs hybrid ZnO from the precursor with different volumes of AuNPs of 0 mL, 2 mL, 6 mL, 8 mL and 10 mL are 3.01 eV, 3.04 eV, 2.94 eV, 3.06 eV and 2.92 eV respectively. The results reveal that all the ZnO/AuNPs and pure black ZnO show lower band gap energy compared to the typically reported 3.34 eV of pure ZnO [ 10 , 11 ]. Furthermore, the band gap of ZnO/AuNPs nanocomposites is effectively influenced by the amount of AuNPs.…”

Section: Resultsmentioning

confidence: 72%

“…Of the many metal oxide semiconductor materials, ZnO has attracted considerable attention for use in the fabrication of RH sensors. ZnO is an n-type II-VI functional semiconductor material having a wide band gap (3.37 eV) hexagonal wurtzite structure with unique electrical and optical properties such as high electron Hall mobility, biocompatibility, high transparency and favorable morphology [ 10 , 11 ]. Humidity sensors based on ZnO materials have been fabricated in various forms, such as single crystals, thin film and sintered pellets [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

AuNPs Hybrid Black ZnO Nanorods Made by a Sol-Gel Method for Highly Sensitive Humidity Sensing

Zhang¹,

Zhang²,

Lin³

et al. 2018

Sensors

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A highly sensitive self-powered humidity sensor has been realized from AuNPs hybrid black zinc oxide (ZnO) nanorods prepared through a sol-gel method. XRD pattern reveals that both ZnO and ZnO/AuNPs exhibit a wurtzite structure. ZnO/AuNPs nanorods grow in a vertical alignment, which possesses high uniformity and forms dense arrays with a smaller diameter than that of ZnO nanoparticles. All ZnO/AuNPs and pure black ZnO show lower band gap energy than the typically reported 3.34 eV of pure ZnO. Furthermore, the band gap of ZnO/AuNPs nanocomposites is effectively influenced by the amount of AuNPs. The humidity sensing tests clearly prove that all the ZnO/AuNPs humidity sensors exhibit much higher response than that of ZnO sensors, and the sensitivity of such ZnO/AuNPs nanorods (6 mL AuNPs) display a change three orders higher than that of pure ZnO with relative humidity (RH) ranging from 11% to 95% at room temperature. The response and recovery time of the ZnO/AuNPs are 5.6 s and 32.4 s, respectively. This study of the construction of semiconductor/noble metal sensors provides a rational way to control the morphology of semiconductor nanomaterials and to design a humidity sensor with high performance.

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“…Характерной особенностью анализируемых ИК-спектров является наличие существенного числа мод поглощения, отвечающих не только ультрадисперсному [17,18]. Сильное смещение низкоэнергетической моды при 500 cm −1 (по сравнению с объемным кристаллом, для которого характерно ее положение около 450 cm −1 ) может быть объяснено микродеформациями кристаллической решетки.…”

Section: результаты и их обсуждениеunclassified

Анализ Структурной Эволюции Порошков Оксида Цинка, Полученных Методом Механического Высокоэнергетического Размола

Аверин¹,

Пронин²,

Якушова³

et al. 2019

Журнал Технической Физики

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Zinc oxide powders made by mechanical high-energy grinding have been investigated using the methods of scanning electron microscopy, thermal nitrogen desorption, and Raman spectroscopy of infrared Fourier spectroscopy. Their structural evolution, including reduction of the average size of crystallites, increase in specific surface area, as well as changes in the number and ratio of adsorption centers, has been demonstrated. The data on the reconstruction of the surface of zinc oxide powders and multiple bond breaking in near-surface areas resulting from long-term dispersion have been presented.

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Transition metal (Co, Mn) co-doped ZnO nanoparticles: Effect on structural and optical properties

Cited by 181 publications

References 46 publications

AACVD Synthesis and Characterization of Iron and Copper Oxides Modified ZnO Structured Films

AACVD Synthesis and Characterization of Iron and Copper Oxides Modified ZnO Structured Films

AuNPs Hybrid Black ZnO Nanorods Made by a Sol-Gel Method for Highly Sensitive Humidity Sensing

Анализ Структурной Эволюции Порошков Оксида Цинка, Полученных Методом Механического Высокоэнергетического Размола

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