Microstructure-Controlled Deposition of SrTiO₃ Thin Film on Self-Assembled Monolayers in an Aqueous Solution of (NH₄)₂TiF₆−Sr(NO₃)₂−H₃BO₃

Abstract

Strontium titanate precursor thin films were directly deposited on different self-assembled monolayers (SAM) in an aqueous solution at 40−60 °C. We have investigated the film growth rate, mechanism, and kinetics. The film microstructure and thickness can be controlled by appropriate SAM surfaces and solution conditions, such as the concentration of starting materials, pH, and deposition temperatures. Uniform, smooth, and adhesive films with thickness in the range of 25−480 nm could be successfully prepared on the OH surfaces of UV-modified SAM. The films were transparent and composed of closely packed particles of 20−50 nm, which formed by coalescence of very small particles. The Sr species preferably reacts with intermediate Ti species to produce SrTiO3 precursor solid when the Sr and Ti species coexisted in the present solution system, resulting in a stoichiometry in terms of Sr/Ti ratio even if the Ti species was excessive.

Preparation of Sm2S3 thin films by liquid phase deposition method with self-assembled monolayers

“…The higher pH may lead to the increase of solution supersaturation, resulting in higher growth of the thin films and smaller grain size, which will lead to the well crystallization of the thin films. This result is similar to the research results reported by Gao et al [15]. When the pH value reaches 3.5, both the diffraction peak intensity and the orientation of the Sm 2 S 3 thin films decrease slightly.…”

A mild synthetic route to Fe3O4@TiO2-Au composites: preparation, characterization and photocatalytic activity

“…The prepared Fe 3 O 4 spheres were negatively charged and well dispersed in water due to the surface bound PSSMA molecules [26]. for TiO 2 NPs has been proposed as follows [34][35][36]: The binding energies in the Ti 2p XPS spectrum (Fig. 4c), which were observed at [32,39].…”

Magnetic properties of nanostructured CoxFe3−xO4 (0<x<0.2) thin films obtained by a low-temperature soft solution processing method

“…Accordingly, there are only few reports on the synthesis of polycrystalline perovskite-type ABO 3 (A = Sr, Ba) thin films with a columnar morphology [7][8][9], as well as the formation of iron-nickel binary oxide films [10]. Recently, this method was extended by our group to the preparation of superparamangetic zinc ferrite films with a columnar morphology [11].…”