Investigation of some physical properties of ZnO nanofilms synthesized by micro-droplet technique

Hamzaoui, Nihel; Boukhachem, A.; Ghamnia, M.; Fauquet, C.

doi:10.1016/j.rinp.2017.06.005

Cited by 27 publications

(12 citation statements)

References 35 publications

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“…The optical properties (e.g., n and k values) of the ZnO structures depend on the growth or deposition methods. [36][37][38][39][40] Therefore, an accurate measurement of the n and k values of the ZnO film prepared by SPE is essential to facilitate the design of a functional metasurface device. For comparison, the n and k values of both the ZnO seed layer and the ZnO film obtained by SPE were characterized by using a spectroscopic ellipsometer.…”

Section: Optical Properties Of Zno Filmsmentioning

confidence: 99%

Dielectric Metasurface from Solution‐Phase Epitaxy of ZnO Nanorods for Subtractive Color Filter Application

Liu

Quan

et al. 2020

Advanced Optical Materials

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In recent years, metasurfaces have received considerable attention owing to their versatile range of applications. However, in the case of metal‐oxide‐based dielectric metasurfaces, the difficulty and cost of a conventional top‐down nano‐fabrication process largely hinder their applications. In this work, a fabrication method is proposed for dielectric metasurfaces based on the solution‐phase epitaxy of ZnO nanorods. Using this method, precise control of the size and position of the synthesized ZnO nanostructures is achieved. Furthermore, a functional subtractive color filter is also designed and fabricated using this approach. The diameters of the synthesized ZnO nanorods range from 180 to 320 nm, and the subtractive color filter exhibits a wide color tuning ability from yellow to magenta to cyan. Such solution‐based bottom‐up fabrication of ZnO nanorods eliminates the need for dry etching, and demonstrates the potential to grow high‐aspect‐ratio ZnO nanostructures for efficient dielectric metasurfaces.

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Section: Optical Properties Of Zno Filmsmentioning

confidence: 99%

Dielectric Metasurface from Solution‐Phase Epitaxy of ZnO Nanorods for Subtractive Color Filter Application

Liu

Quan

et al. 2020

Advanced Optical Materials

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“…The synthesis of colloidal ZnO nanoparticles can be carried out using different types of precursors dissolved in alcohol solvents [26]. We used zinc acetate dehydrate Zn(CH 3 COO) 2 :2H 2 O (99.999%, from Sigma-Aldrich France, St. Louis, MO, USA) as ZnO precursor and methanol as a solvent, following the procedure which is described in more detail in [27].…”

Section: Synthesis Of Zno Nanoparticles Building Unitsmentioning

confidence: 99%

Dye-Doped ZnO Microcapsules for High Throughput and Sensitive Optofluidic Micro-Thermometry

et al. 2020

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The main objective of this work is to show the proof of concept of a new optofluidic method for high throughput fluorescence-based thermometry, which enables the measure of temperature inside optofluidic microsystems at the millisecond (ms) time scale (high throughput). We used droplet microfluidics to produce highly monodisperse microspheres from dispersed zinc oxide (ZnO) nanocrystals and doped them with rhodamine B (RhB) or/and rhodamine 6G (Rh6G). The fluorescence intensities of these two dyes are known to depend linearly on temperature but in two opposite manner. Their mixture enables for the construction of reference probe whose fluorescence does not depend practically on temperature. The use of zinc oxide microparticles as temperature probes in microfluidic channels has two main advantages: (i) avoid the diffusion and the adsorption of the dyes inside the walls of the microfluidic channels and (ii) enhance dissipation of the heat generated by the focused incident laser beam thanks to the high thermal conductivity of this material. Our results show that the fluorescence intensity of RhB decreases linearly with increasing temperature at a rate of about −2.2%/°C, in a very good agreement with the literature. In contrast, we observed for the first time a nonlinear change of the fluorescence intensity of Rh6G in ZnO microparticles with a minimum intensity at a temperature equal to 40 °C. This behaviour is reproducible and was observed only with ZnO microparticles doped with Rh6G.

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“…The pioneers of zinc oxide synthesis have succeeded in using this material as a window for silicon-based solar cells [16][17][18]. Due to these promising properties, we were interested in the synthesis and growth of ZnO thin nanostructured films, which can increase their electrical properties [19][20][21]. ZnO nanostructured films can be obtained by several methods which can be of physical type such as radio frequency magnetron sputtering [22,23], electron beam evaporation [24,25], pulsed laser deposition [26,27], molecular beam epitaxy (MBE) [28,29], or of chemical type as spin coating [30,31], dip coating [32,33], spray pyrolysis [34,35], chemical vapor deposition (CVD) [36,37] and plasma-enhanced chemical vapor deposition (PECVD) [38,39].…”

Section: Introductionmentioning

confidence: 99%

Compositional, Structural, Morphological, and Optical Properties of ZnO Thin Films Prepared by PECVD Technique

et al. 2021

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ZnO thin films were synthesized on silicon and glass substrates using the plasma-enhanced chemical vapor deposition (PECVD) technique. Three samples were prepared at substrates temperatures of 200, 300, and 400 °C. The surface chemical composition was analyzed by the use of X-Ray Photoelectron spectroscopy (XPS). Structural and morphological properties were studied by using X-ray diffraction (XRD) and scanning electron microscopy (SEM). Optical properties were carried out by UV-visible spectroscopy. XPS spectra showed typical peaks of Zn(2p3/2), Zn(2p1/2), and O(1s) of ZnO with a slight shift attributed to the substrate temperature. XRD analysis revealed hexagonal wurtzite phases with a preferred (002) growth orientation that improved with temperature. Calculation of grain size and dislocation density revealed the crystallization improvement of ZnO when the substrate temperature varied from 200 to 400 °C. SEM images of ZnO films showed textured surfaces composed of grains of spherical shape uniformly distributed. The transmittance yields are reaching 80%, and the values of the band-gap energy indicate that the ZnO films prepared by PECVD present transparent and semiconducting properties.

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Investigation of some physical properties of ZnO nanofilms synthesized by micro-droplet technique

Cited by 27 publications

References 35 publications

Dielectric Metasurface from Solution‐Phase Epitaxy of ZnO Nanorods for Subtractive Color Filter Application

Dielectric Metasurface from Solution‐Phase Epitaxy of ZnO Nanorods for Subtractive Color Filter Application

Dye-Doped ZnO Microcapsules for High Throughput and Sensitive Optofluidic Micro-Thermometry

Compositional, Structural, Morphological, and Optical Properties of ZnO Thin Films Prepared by PECVD Technique

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