A novel process for the preparation of Bi2Sr2CaCu2O8+ films with smooth surface via sol-gel method

Comparative study of adsorption of cationic dyes on novel surface functionalized mesoporous titanate‐based materials

“…A relatively modified sol-gel method was used to synthesize the modified MT due to its superiority over the synthesis of powdered materials, which have high purity, homogeneity and stoichiometry at low temperature. [16,17] First, a mixture (1:2) of titanium(IV) isopropoxide precursor (97 %, Sigma-Aldrich) and isopropanol was added dropwise to the EDTA-Na2 solution prepared by mixing different amounts of EDTA-Na2 (99 %, Sigma-Aldrich) with 100 mL of deionized water and 1.40 mL of acetic acid under vigorous stirring at 4 o C for 3 h in order to make the sol form with varied EDTA-Na2:TiO2 molar ratios (0.5:1.0, 1.0:1.0 and 1.5:1.0). The asprepared solution was aged in the dark for 24 h to induce gelation.…”

Phase purity and surface morphology of high-J superconducting Bi2Sr2Ca1Cu2O8+δ thin films

“…Surface roughness values were calculated excluding particulates on the film surface which were a result of the PLD process and not a result of the substrate surface quality [22]. As low surface roughness of superconducting films has been linked to improved critical current densities, the Bi-2212 films should be as smooth as possible [23].…”

“…A comparison regarding T c0 and surface roughness of Bi-2212 films deposited on different substrates by various deposition techniques is given in Table 1 (refs. [23,[27][28][29][30]).…”