ZnO nanocolumns synthesized by chemical bath process and spray pyrolysis: Ultrasonic and mechanical dispersion of ZnO seeds and their effect on optical and morphological properties

Báez‐Rodríguez, A.; Zamora-Peredo, L.; Soriano-Rosales, María Guadalupe; Hernández-Torres, J.; García-González, L.; Calderón-Olvera, R.M.; Garcı́a-Hipólito, M.; Guzmán‐Mendoza, J.; Falcony, C.

doi:10.1016/j.jlumin.2019.116830

Cited by 17 publications

(7 citation statements)

References 43 publications

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“…ZnO nanorods, the visible emission peak of ZnO nanoparticles/nanofibers shifted to a longer wavelength of ~ 660 nm, and NBE peak disappeared. The dominated visible emission peak in the PL in ZnO suggested that oxygen vacancy defects exist in ZnO [11,12]. However, it should be noted that the visible emission peak of ZnO nanoparticles/nanofibers was much higher than that of ZnO nanorods.…”

Section: Resultsmentioning

confidence: 96%

Synthesis of ZnO Nanoparticles/Nanofibers and Their Luminescence via Electrospinning

Vuong¹,

Huan²,

Thong³

et al. 2021

MaP

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This article reports on the synthesis procedure of ZnO nanoparticles/nanofibers structure by electrospinning method using Zinc acetate and polyvinylpyrrolidone (PVP) surfactant as reagents and evaluates their luminescent properties. The microstructure of ZnO nanoparticles/nanofibers was observed by FE-SEM. The phase formation of ZnO nanoparticles/nanofibers was studied by XRD. ZnO nanoparticles/nanofibers structure shows strong luminescence centering at 660 nm, which has potential applications in solid-state lighting.

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Section: Resultsmentioning

confidence: 96%

Synthesis of ZnO Nanoparticles/Nanofibers and Their Luminescence via Electrospinning

Vuong¹,

Huan²,

Thong³

et al. 2021

MaP

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“…It is shown that the characteristic vibration modes of Si could be clearly observed at 306 and 521 cm −1 , contributing to the longitudinal acoustic (LA) and transverse optical (TO) modes of Si [21,22]. The Raman spectrum of the ZnO sample shows two defined peaks located at 100 and 436 cm −1 , corresponding to the two vibrational modes E 2 low (E 2 L) and E 2 high (E 2 H) of ZnO [23,24]. For ZnO/MoS 2 sample, the three distinct active modes at 226, 347, and 410 cm −1 could be identified as corresponding to the 1T-MoS 2 [25], E 1 2h [25], and A 1g of MoS 2 [26].…”

Section: Resultsmentioning

confidence: 97%

“…The NUV band is well-known and could be attributed to the NBE emission of ZnO [29,30]. The broad visible emission peaked at around 507 nm is defect-related emissions (DE) such as oxygen antisites (OZn), interstitial oxygen (Oi), oxygen vacancy (Vo) in the ZnO nanowires, and ZnO/MoS 2 heterostructures [9,23]. Further, the visible emission PL intensity of the ZnO/MoS 2 heterostructures was found substantially quenched compared to that of the ZnO nanowires.…”

Section: Resultsmentioning

confidence: 99%

Optical Properties of 1D ZnO/MoS\(_2\) Heterostructures Synthesized by Thermal Evaporation Method

et al. 2022

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MoS2 material attracts a great attention from researchers due to its graphene-like structure and the bandgap difference between its hexagonal monolayer and bulks. Recently, ZnO/MoS2 heterostructures have been received significant interest due to their distinguished properties. In this study, one-dimensional ZnO and ZnO/MoS2 heterostructures were successfully synthesized by a thermal co-evaporation method. Compare with ZnO, the band-to-band emission of ZnO/MoS2 heterostructures establishes a “blueshift” towards a shorter wavelength. It could be explained by the lattice strain in ZnO/MoS2 heterostructures due to the difference of primitive cell of ZnO and MoS2. Additionally, the quench in the visible region of the PL spectrum of ZnO/MoS2 heterostructures also explains the reduction of the defect in ZnO due to the presence of MoS2.

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“…Various methods have been used for the deposition of the ZnO seed layers which include spray pyrolysis [ 4 , 17 , 18 , 19 ], sputtering [ 20 ], spin coating [ 8 , 21 ], dip coating [ 22 ], successive ionic layer adsorption and reaction (SILAR) [ 23 ] among others. Ultrasonic spray pyrolysis is a simple technique offering several advantages which include; low cost, better control of deposition rate and microstructures thickness, moderate deposition temperatures (300–500 °C) and wide coverage of uniform adherent films or nanoparticles [ 24 , 25 , 26 , 27 , 28 ]. Few studies have been published on the use of ultrasonic spray pyrolysis for seed layer depositions necessitating further investigations [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

“…Ultrasonic spray pyrolysis is a simple technique offering several advantages which include; low cost, better control of deposition rate and microstructures thickness, moderate deposition temperatures (300–500 °C) and wide coverage of uniform adherent films or nanoparticles [ 24 , 25 , 26 , 27 , 28 ]. Few studies have been published on the use of ultrasonic spray pyrolysis for seed layer depositions necessitating further investigations [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of growth conditions on properties of CBD synthesized ZnO nanorods grown on ultrasonic spray pyrolysis deposited ZnO seed layers

Mosalagae

Murape

Lepodise

2020

Heliyon

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ZnO nanorods were synthesized on a seed layer coated glass substrate using chemical bath deposition (CBD). Prior to growth, a seed layer had been prepared via ultrasonic spray pyrolysis method. The aim was to explore the influence of varying the chemical bath deposition conditions namely: growth time, bath temperature and concentration levels of the precursor on the orientation, structural, optical and vibrational properties of the subsequently grown nanorods. The presence of ZnO nanorods resembling the hexagonal-wurtzite structure having preference of orientation along the c-axis and varying crystallinity under different growth parameters was confirmed by X-ray diffraction (XRD). Scanning Electron Microscopy (SEM) acquired images of uniformly arranged and vertically oriented ZnO nanorods grown at a relatively higher bath temperature of 90 °C and shorter growth period of 2 h. UV/Vis/NIR spectrophotometer measurements revealed an optical transmittance of between 50 – 70 % for the nanorods. Raman spectroscopy results confirmed the presence of Raman active E 2(low) and E 2(high) modes corresponding to 98 cm −1 and 478 cm −1 belonging to the hexagonal ZnO phase. This work shows that the orientation, structural, optical and vibrational properties of the grown nanorod structures are controlled via alteration of the growth parameters.

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ZnO nanocolumns synthesized by chemical bath process and spray pyrolysis: Ultrasonic and mechanical dispersion of ZnO seeds and their effect on optical and morphological properties

Cited by 17 publications

References 43 publications

Synthesis of ZnO Nanoparticles/Nanofibers and Their Luminescence via Electrospinning

Synthesis of ZnO Nanoparticles/Nanofibers and Their Luminescence via Electrospinning

Optical Properties of 1D ZnO/MoS\(_2\) Heterostructures Synthesized by Thermal Evaporation Method

Effects of growth conditions on properties of CBD synthesized ZnO nanorods grown on ultrasonic spray pyrolysis deposited ZnO seed layers

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