High-quality PMMA/ZnO NWs piezoelectric coating on rigid and flexible metallic substrates

Chelu, Mariana; Stroescu, Hermine; Anastasescu, Mihai; Calderón-Moreno, José Maria; Preda, Silviu; Stoica, M.; Fogarassy, Zsolt; Petrik, P.; Gheorghe, Marin; Pârvulescu, Cătălin; Brasoveanu, Costin; Dinescu, Adrian; Moldovan, Carmen; Gärtner, M.

doi:10.1016/j.apsusc.2020.147135

Cited by 29 publications

(19 citation statements)

References 59 publications

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“…Once the seed layer is deposited, the substrates are immersed in a supersaturated growth solution at a moderate temperature for several hours. Using this technique, ZnO NWs or nanorods (NRs) have been grown over metallic [41][42][43] and polymeric materials [30,44,45], depending on the type of ZnO seed layer deposition. In this work, zinc nitrate hexahydrate (Zn(NO 3 ) 2 .6H 2 O) and hexamethylenetetramine ((CH 2 ) 6 N 4 ) are used as precursors for the synthesis of ZnO NWs using the CBD process.…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature Growth of ZnO Nanowires from Gravure-Printed ZnO Nanoparticle Seed Layers for Flexible Piezoelectric Devices

et al. 2021

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Zinc oxide (ZnO) nanowires (NWs) are excellent candidates for the fabrication of energy harvesters, mechanical sensors, and piezotronic and piezophototronic devices. In order to integrate ZnO NWs into flexible devices, low-temperature fabrication methods are required that do not damage the plastic substrate. To date, the deposition of patterned ceramic thin films on flexible substrates is a difficult task to perform under vacuum-free conditions. Printing methods to deposit functional thin films offer many advantages, such as a low cost, low temperature, high throughput, and patterning at the same stage of deposition. Among printing techniques, gravure-based techniques are among the most attractive due to their ability to produce high quality results at high speeds and perform deposition over a large area. In this paper, we explore gravure printing as a cost-effective high-quality method to deposit thin ZnO seed layers on flexible polymer substrates. For the first time, we show that by following a chemical bath deposition (CBD) process, ZnO nanowires may be grown over gravure-printed ZnO nanoparticle seed layers. Piezo-response force microscopy (PFM) reveals the presence of a homogeneous distribution of Zn-polar domains in the NWs, and, by use of the data, the piezoelectric coefficient is estimated to be close to 4 pm/V. The overall results demonstrate that gravure printing is an appropriate method to deposit seed layers at a low temperature and to undertake the direct fabrication of flexible piezoelectric transducers that are based on ZnO nanowires. This work opens the possibility of manufacturing completely vacuum-free solution-based flexible piezoelectric devices.

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Section: Introductionmentioning

confidence: 99%

Low-Temperature Growth of ZnO Nanowires from Gravure-Printed ZnO Nanoparticle Seed Layers for Flexible Piezoelectric Devices

et al. 2021

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“…It should be noted that uniform distribution cannot be fulfilled by only stirring the mixture without optimized interaction between the polymer matrix and nanoparticles and chemical bonding; (3) in-situ polymerization using nanoparticles; (4) chemical surface modification to graft a functional polymer molecule to the active sites on the nanoparticles’ surface. Previous investigations have confirmed that to prepare a homogenous polymer/nanoparticle dispersion, the content of nanoparticles must be kept at less than 10 wt% due to their high surface energy and immiscibility 8 – 10 .…”

Section: Introductionmentioning

confidence: 99%

UV-shielding properties of a cost-effective hybrid PMMA-based thin film coatings using TiO2 and ZnO nanoparticles: a comprehensive evaluation

Yousefi

Mousavi

Heris

et al. 2023

Sci Rep

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This study aimed to assess the UV-shielding features of the PMMA-based thin film coatings with the addition of TiO2 and ZnO nanoparticles as nanofillers considering different contents. Furthermore, the effect of TiO2/ZnO nanohybrids at different ratios and concentrations was examined. The XRD, FTIR, SEM, and EDX analyses characterized the prepared films' functional groups, structure, and morphology. Meanwhile, the coatings' optical properties and UV-protecting capability were investigated by ultraviolet–visible (UV–Vis) spectroscopy. The UV–Vis spectroscopic study revealed that as the concentration of nanoparticles increased in the hybrid-coated PMMA, the absorption in the UVA region increased. Overall, it can be concluded that the optimal coatings for PMMA were 0.1 wt% TiO2, 0.1 wt% ZnO, and 0.025:0.025 wt% TiO2: ZnO nanohybrid. Considering the acquired FT-IR of PMMA with different content of nanoparticles before and after exposure to the UV irradiation, for some films, it was confirmed that the polymer-based thin films degraded after 720 h, with either decreasing or increasing intensity of the degraded polymer, peak shifting, and band broadening. Notably, the FTIR results were in good agreement with UV–Vis outcomes. In addition, XRD diffraction peaks demonstrated that the pure PMMA matrix and PMMA coating films did not show any characteristic peaks indicating the presence of nanoparticles. All diffraction patterns were similar with and without any nanoparticles. Therefore, it depicted the amorphous nature of polymer thin film.

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“…Zinc oxide (ZnO) is one of the most promising n-type multifunctional semiconductors, due to the considerable diversity of nanostructures it configures (nanoparticles, nanocenters, nanowire matrix, nanorods and nanotubes). ZnO is used in a considerable number of applications, such as: piezoelectric [ 5 ], optical, optoelectronic nanogenerators, sensors, actuators, biosensors, biomedicine, etc. [ 6 – 8 ].…”

Section: Introductionmentioning

confidence: 99%

ZnO/NiO heterostructure-based microsensors used in formaldehyde detection at room temperature: Influence of the sensor operating voltage

Chelu

Chesler

Anastasescu

et al. 2022

J Mater Sci: Mater Electron

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Recently the emissions of volatile organic compounds (VOCs) in the atmosphere have increased dramatically with rapid development of urbanization and industry. This led to a large decline in air quality around the world, which resulted in a heavy impact on human health. Therefore, new/cheap detection devices for VOCs are of high interest. Formaldehyde (FA) is a very toxic VOC, which damages the respiratory system even in the smallest doses and short exposure time. Zinc oxide (ZnO)/nickel oxide (NiO) heterostructures were synthesized using an economical route: firstly, NiO was prepared by liquid exfoliation technique and deposited by dip-coating on alumina ceramic transducers with two interdigital gold (Au) electrodes, followed by low—temperature hydrothermal growth of ZnO. The as-prepared sensors were characterized by atomic force microscopy (AFM), scanning electron microscopy (SEM-EDAX), and X-Ray fluorescence (XRF). The response/recovery of ZnO/NiO heterostructure-based microsensors for formaldehyde was investigated at room temperature, in agreement with modern sensing requirements. The sensor operating voltage was varied between 1.5 and 5.0 V direct current (DC), to achieve the best sensor performance.

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High-quality PMMA/ZnO NWs piezoelectric coating on rigid and flexible metallic substrates

Cited by 29 publications

References 59 publications

Low-Temperature Growth of ZnO Nanowires from Gravure-Printed ZnO Nanoparticle Seed Layers for Flexible Piezoelectric Devices

Low-Temperature Growth of ZnO Nanowires from Gravure-Printed ZnO Nanoparticle Seed Layers for Flexible Piezoelectric Devices

UV-shielding properties of a cost-effective hybrid PMMA-based thin film coatings using TiO2 and ZnO nanoparticles: a comprehensive evaluation

ZnO/NiO heterostructure-based microsensors used in formaldehyde detection at room temperature: Influence of the sensor operating voltage

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