5 documents found, page 1 of 1
Improvement of luminescence properties of Eu-doped ZnO nanoparticles followed b...
Bessadok, M. N.; Bouri, A.; Ananias, D.; El Mir, L.Silica-based composite materials are of great importance due to the high porosity and large specific surface area of silica (SiO2) glass that help to explore several applications. This research reports the physical properties of SiO2/Eu%-Zn2SiO4 composites (Eu% = 0.1, 0.5, and 1%) prepared by a modified sol-gel process. First, structural, morphological, and vibrational analysis show distinct fine diffraction pe...
Physical properties of a Eu3+-doped Zn2SiO4 phosphor ceramic material with enha...
Bessadok, M. N.; Bouri, A.; Ananias, D.; Mrabet, S.; Vázquez-Vázquez, C.; El Mir, L.In the present study, a SiO2/Zn2SiO4:Eu glass–ceramic composite was synthesized by a homemade modified sol–gel method. Structural, morphological, and optical properties were investigated. Structural and morphological analysis proves the existence of silica and zinc silicate phases with the latter surrounded and shielded by the silica matrix. Optical–vibrational analysis shows the fingerprint peaks of a Zn2SiO4 ...
Growth of Al:ZnO nano-flowers by pulsed laser ablation deposition
Tiss, B.; Martínez-Martínez, D.; Silva, B.; Bouguila, N.; El Mir, L.; Almeida, B.; Moura, C.; Cunha, L.Aluminium-doped (3%) zinc oxide thin films (AZO) were prepared, using pulsed laser deposition, with varying deposition times. The target was fabricated from compacted aluminium-doped zinc oxide nano-powder produced by sol–gel. The films had a growth consisting of nanostructures in the form of columns with sharp ends which, for certain deposition times, resemble nano-flowers or nano-leaves. The small spheroid-li...
Resistive switching behavior in ZnO:Ca thin films deposited by a pulsed laser d...
Mejri, I. H.; Omri, K.; Ghiloufi, I.; Silva, José Pedro Basto; Gomes, M. J. M.; El Mir, L.Calcium-doped ZnO (CZO) nanopowders were synthesized using the sol–gel method. The structural characteristics were investigated by X-ray diffraction (XRD) and the analysis reveals that our samples are crystalized in a wurtzite hexagonal structure. The morphological properties and the chemical composition of the nanoparticles were studied by transmission electron microscopy (TEM), scanning electron microscopy (S...
Synthesis and characterization of microporous carbon matrix enriched by MnO2 na...
Ahmed, W.; Jeidi, H.; Najeh, I.; Dahman, H.; Silva, José Pedro Basto; Moreira, J. Agostinho; Pereira, M.; Gomes, M. J. M.; El Mir, L.Nanocomposites (RF/MnO2) based on resorcinol–formaldehyde (RF) as carbon matrix and manganese oxide nanoparticles (MnO2) as incorporated material were elaborated by a sol–gel method. The effect of pyrolysis temperature was studied using different characterization techniques. Firstly, the Raman results show two strong peaks referred to G and D bands of carbon and an additional one related to MnO2. Also, it revea...