scholarly journals Hybrid approaches coupling sol–gel and plasma for the deposition of oxide-based nanocomposite thin films: a review

2021 ◽  
Vol 3 (6) ◽  
Author(s):  
Maria Mitronika ◽  
Agnès Granier ◽  
Antoine Goullet ◽  
Mireille Richard-Plouet

AbstractIn view of developing new materials with enhanced properties, such as nanocomposite (NC) thin films, special interest has been given in optimizing the deposition processes themselves. The latter, if well selected, could give the freedom to control the NCs synthesis and final properties. Attempting to overcome severe challenges observed when creating NC or oxide-based NC film, hybrid approaches combining injection of colloidal solutions and plasma processes have been proposed. This review focuses on oxide-based NCs, using as an example the TiO2 NPs and SiO2 matrix as NCs, while investigating their optical and dielectric properties. Additionally, this review presents the state-of-the-art in processes for the preparation of the NCs. The major categories of hybrid approaches coupling sol–gel and plasma processes are given. Finally, a comparative study among the published works is provided, aiming in highlighting the impact that each approach has on the physical and chemical characteristics of the produced NCs.

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
C. Bidaud ◽  
D. Berling ◽  
D. Jamon ◽  
E. Gamet ◽  
S. Neveu ◽  
...  

AbstractThis paper is aimed at investigating the process of photocrosslinking under Deep-UV irradiation of nanocomposite thin films doped with cobalt ferrite magnetic nanoparticles (MNPs). This material is composed of a hybrid sol–gel matrix in which MNP can be introduced with high concentrations up to 20 vol%. Deep-UV (193 nm) is not only interesting for high-resolution patterning but we also show an efficient photopolymerization pathway even in the presence of high concentration of MNPs. In this study, we demonstrate that the photocrosslinking is based on the free radical polymerization of the methacrylate functions of the hybrid precursor. This process is initiated by Titanium-oxo clusters. The impact of the nanoparticles on the photopolymerization kinetic and photopatterning is investigated. We finally show that the photosensitive nanocomposite is suitable to obtain micropatterns with sub-micron resolution, with a simple and versatile process, which opens many opportunities for fabrication of miniaturized magneto-optical devices for photonic applications.


2021 ◽  
Author(s):  
Ahmed ZITI ◽  
Bouchaib HARTITI ◽  
Amine BELAFHAILI ◽  
Hicham LABRIM ◽  
Salah FADILI ◽  
...  

Abstract Quaternary semiconductor Cu2NiSnS4 thin film was made by the sol-gel method associated to dip-coating technique on ordinary glass substrates. In this paper, we have studied the impact of dip-coating cycle at different cycles: 4, 5 and 6 on the structural, compositional, morphological, optical and electrical characteristics. CNTS thin films have been analyzed by various characterization techniques including: X-ray diffractometer (XRD), Raman measurements, scanning electron microscope (SEM), energy dispersive X-ray spectroscope (EDS), UV-visible spectroscopy and four-point probe method. XRD spectra demonstrated the formation of cubic Cu2NiSnS4 with privileged orientation at (111) plane. Crystallite size of cubic CNTS thin films increase with from 6.30 to 9.52 with dip-coating cycle augmented. Raman scattering confirmed the existence of CNTS thin films by Raman vibrational mode positioned at 332 cm− 1. EDS investigations showed near-stoichiometry of CNTS sample deposited at 5 cycles. Scanning electron microscope showed uniform surface morphologies without any crack. UV-visible spectroscopy indicated that the optical absorption values are larger than 104 cm− 1, Estimated band gap energy of CNTS absorber layers decrease from 1.64 to 1.5 eV with dip-coating cycle increased. The electrical conductivity of CNTS thin films increase from 0.19 to 4.16 (Ω cm)-1. These characteristics are suitable for solar cells applications.


2008 ◽  
Vol 516 (7) ◽  
pp. 1499-1502 ◽  
Author(s):  
V. Musat ◽  
E. Fortunato ◽  
A.M. Botelho do Rego ◽  
R. Monteiro

1995 ◽  
Vol 10 (9) ◽  
pp. 2271-2276 ◽  
Author(s):  
V. Pierre ◽  
D. Pierre ◽  
A.C. Pierre

New materials were made by infiltration of sol-gel boehmite thin films with copper acetate. The structure and phase transformation of these materials during heat treatment were studied. It was found that infiltration in the boehmite state did not end up in the same material as direct infiltration in the θ-alumina derived from boehmite, even after both types of materials were heat-treated at 900 °C. Infiltration in boehmite makes it possible to synthesize sandwich structures comprised of alternate layers of CuO and of γ-alumina.


2014 ◽  
Vol 564 ◽  
pp. 170-178 ◽  
Author(s):  
S. Kermadi ◽  
N. Agoudjil ◽  
S. Sali ◽  
M. Boumaour ◽  
S. Bourgeois ◽  
...  

2014 ◽  
Vol 617 ◽  
pp. 161-165
Author(s):  
Chrystelle Neaime ◽  
Fabien Grasset ◽  
Tangi Aubert

One of the largest application areas of sol-gel chemistry is thin-film preparation. Using this approach, we started to synthesize M@ZnO colloidal solutions for the preparation of functional thin films. ZnO is a wide band-gap (3.37 eV) semiconductor with large exciton binding energy. In the bulk or in nanosized form, it could be used in a wide range of applications such as UV light emitters, spin functional devices, gas sensors, transparent electronics or surface acoustic wave devices. Since recently, the preparation of innovative functional M@ZnO materials by doping or functionalizing nanocolloids constitutes a new challenge. Using high concentrations of the different Ti@ZnO nanocolloids, we were able to prepare various functional colloidal solutions with tunable emission and thin films, such as red-luminescent Eu3+@ZnTiO3 or versatile ZnTiON colored nanomaterials.


RSC Advances ◽  
2015 ◽  
Vol 5 (13) ◽  
pp. 9650-9657 ◽  
Author(s):  
Heming Wang ◽  
Vikas Kumar

Novel sol–gel-derived polysiloxanes/PEDOT:PSS nanocomposite thin films were developed with high transparency, conductivity, and superior water- and scratch-resistance.


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