Zn-Al Layered Double Hydroxide Thin Film Fabricated by the Sputtering Method and Aqueous Solution Treatment

Abstract

Zn-Al layered double hydroxides (LDHs) were synthesized herein via a simple process. First, Al-doped ZnO film was deposited onto a glass substrate using the facing target sputtering system. Successful synthesis of the Zn–Al LDH was achieved via a treatment process using an aqueous solution which contains NO3− anions. X-ray diffraction analysis confirmed that it was consistent with the previous Zn–Al LDH synthesis experiment data, and the calculated d-value was 9.1 Å. Scanning electron microscopy observations revealed that the as-synthesized sample had a plate-like structure.

Effects of Drying Temperature and Molar Concentration on Structural, Optical, and Electrical Properties of β-Ga2O3 Thin Films Fabricated by Sol–Gel Method

“…Reportedly, the optical bandgap energy depends on the thickness of the films [39]. This is in good agreement with the reports on films prepared by direct current magnetron sputtering [40], radio frequency sputtering [41], spin pyrolysis [42], and ion beam sputtering [43].…”

Ag2O/β-Ga2O3 Heterojunction-Based Self-Powered Solar Blind Photodetector with High Responsivity and Stability

“…Figure S5 shows the optical band gap energy of the Ag 2 O film deposited by reactive sputtering under Ar (at 10 sccm) and O 2 (at 3 sccm). The optical band gap energy of the Ag 2 O film was calculated using the Tauc plot equation, under the assumption that the absorption product is given by − where α ο is a material constant, h ν is the photon energy (= 1240/λ), E g is the optical band gap energy, and n is the power coefficient, which can be 1/2, 3/2, 2, or 3 depending on the type of transition (direct allowed, direct forbidden, indirect allowed, or indirect forbidden, respectively). Because the Ag 2 O film has a direct allowed transition, n = 1/2 was used to calculate the optical band gap energy .…”

Synthesis of two-dimensional layered double hydroxides: a systematic overview

“…1,2 The general formula of LDH is [M 1−x 2+ M x 3+ (OH) 2 ] x+ [A x/n n− ] x− •mH 2 O (Fig. 1), [3][4][5] in which M 2+ and M 3+ are metallic divalent and trivalent cations, respectively, and A n− are the interlayered anions. 6 Note that although most LDHs are binary, preparing ternary LDH, quaternary LDH and LDH containing more combinations of metals species is also possible.…”

“…1,9 Second, because LDH have the typical layered structure with weak van der Waals forces between (001) planes and strong in-plane chemical binding, LDH tend to preferentially grow along (001) planes to form 2D morphology during the growth process, which can be reflected by the fact that most of the LDH reported in previous studies present 2D morphology. 5,62…”