Thin films

In the present study, we theoretically investigated the effect of alloy Pt3Zr supported thin film ZrO2 on the electronic properties of adsorbed species consisting of single atom Au and H2 molecules. To this end, we applied a PBE+U method, including dispersion force.

6p vikwong 29-09-2024 4 1   Download

TiO2 thin films were synthesized by using Chemical Vapor Deposition (CVD) method on different substrates, such as glass, aluminium foil , and ceramic. The samples had been characterized by microscopy analysis, SEM, and EDS. The results show that TiO2 thin films were successfully fabricated and TiO2 nanocrystals with size of 50-100 nm loaded uniformly on surface of different substrates.

6p vikwong 29-09-2024 3 1   Download

Polyurethane (PU) thin films quickly degrade under the presence of oxygen, vapor, temperature, and ultraviolet irradiation. Thus, efforts have been dedicated to improving the properties of PU films. This study presents a simple synthesis route to prepare PU embedded with CeO2-SiO2 nanocomposites (CS NCs).

7p vikwong 29-09-2024 5 1   Download

This research aims to synthesize MoS2 thin film for the hydrogen evolution reaction (HER) by the electrochemical way. We investigated various electrochemical conditions, including the pH of electrolyte, the applied current density, and electrolysis time to find optimal synthesis mode.

7p vikwong 29-09-2024 2 2   Download

The thesis "Device Engineering of III-Nitride Semiconductors Based Sensors" covers the scope to explore next-generation optical sensors by growing high-quality IIInitride thin films using plasma-assisted molecular beam epitaxy (PAMBE) system and their deployment towards the fabrication of the device engineered high-performance broadband photodetectors. This thesis mainly focuses on three engineering approaches to fabricate advanced optical sensing devices.

124p runordie3 06-07-2022 12 2   Download

Purpose: The purpose of thesis is to study the influence of temperature, pressure and dopant on the diffusion coefficient and ionic conductivity of the bulk material as CeO2, c-ZrO2, YDC and YSZ. For YDC and YSZ thin films, we find the thickness dependence of the lattice constant, diffusion coefficient and ionic conductivity

28p tunelove 10-06-2021 11 2   Download

: In recent decades, the antimicrobial surfaces/coating properties towards a longlasting microbicidal effect have drawn enormous attention by researchers, they have been developed and used in a wide variety of high-touch hospital devices as a potential approach.

9p larachdumlanat127 02-01-2021 11 3   Download

Magnesium tin silicide (MgSiSn) is known as a good-thermoelectric-performance, safe and cost-efficient alloy material. The goal of this work is to design a magnetron co-sputtering configuration for depositing alloy thin films from three independent metal targets including magnesium (Mg), silicon (Si) and tin (Sn).

6p larachdumlanat127 02-01-2021 9 2   Download

Numerical calculations of the quantities were performed for Fe and W thin films and found to be in good and reasonable agreement with other theoretical results and experimental data. This research proves that thermal expansion coefficients of thin films approach the values of bulk when thin film is about 70 nm thick.

10p tamynhan9 02-12-2020 18 1   Download

In the present study, the influence of temperature and the size of the lattice constant of CeO2 thin film have been studied using three different interatomic potentials. We discuss temperature and thickness dependence of the lattice constant of CeO2 thin films and we compare our calculated results with those of the experimental results.

9p tamynhan8 04-11-2020 16 2   Download

The coefficients of thermal expansion of thin metal film with face-centered cubic structure at zero pressure are investigated using the statistical moment method (SMM), including the anharmonic effects of thermal lattice vibration. The Helmholtz free energy, mean-square atomic displacement and linear thermal expansion coefficients are derived in closed analytic forms in terms of the power moments of the atomic displacement.

8p tamynhan8 04-11-2020 14 1   Download

We report a facile process to fabricate cuprous thin films by thermal oxidation of copper substrates. Structure and phase identification were studied by X-ray diffraction measurement and Raman spectroscopy. Scanning electron microscopy was utilized to study surface morphology of the as-fabricated thin films and optical properties of the samples were investigated by diffused reflectance spectroscopy.

6p tamynhan6 14-09-2020 24 2   Download

We report on an environmentally friendly and versatile chemical solution deposition route to K0.5Na0.5NbO3 (KNN) thin films. The excess amounts of K and Na in KNN precursor solutions was found to be strong influence on perovskite KNN single-phase thin films. It was revealed from Raman spectroscopic analysis data that a change in scattering mode was observed for the KNN thin films fabricated under various processing conditions.

8p tamynhan6 14-09-2020 42 5   Download

In this work, we report a direct growth of the VACNTs on several substrates by using hot-filament chemical vapor deposition (hot-filament CVD) and a catalytic buffer-layer structure. The buffer layer was the aluminum (Al) thin film used together with iron (Fe) as the catalyst.

8p tamynhan6 14-09-2020 11 1   Download

This is mainly due to the appearance of a rod like structure on neat PS which has improved the dispersion as well as provides a higher interface area that enhanced the UV-absorption efficiency of the PS matrix. This analysis is equally supported by the PALS study where the free volume was closely associated with the interfacial interaction between the filler and the PS matrix.

7p tamynhan4 06-09-2020 7 1   Download

Bài viết trình bày việc chế tạo transistor màng mỏng hữu cơ - OTFT (Organic Thin-Film Transistor) kênh P sử dụng vật liệu bán dẫn pentacene và vật liệu cách điện PVC (poly (vinyl cinnamate)). Các OTFT này sau đó được đo các đặc tính điện nhờ hệ đo SCS 4200 và Agilent 4284A LCR.

8p viengland2711 23-07-2019 24 1   Download

The objectives of the thesis: Study on materials fabrication technology; structural - photocatalytic properties of TiO2 material, and TiO2 as the nanostructured variant. On the basis of such material system, the systematic and quantitative study on hydrophilicity or, in other words, the study of surface energy of material systems under Exciation of UV light radiation. Further clarification of the correlation between photocatalytic activity, self-cleaning and hydrophobicity of TiO2 nanostructured materials.

32p xacxuoc4321 09-07-2019 29 5   Download

Objective of the thesis: Successfully fabricate Cu2O thin film having good crystal structure. Fabricate layers protecting Cu2O electrode from photocorrosion. Study the photocatalytic, electro-photocatalytic water splitting properties of the Cu2O electrode.

29p xacxuoc4321 08-07-2019 16 6   Download

Ammonia functionalized UiO66 (UiO66–NH2) in the form of thin film was synthesized by a solvothermal method combined with a dip–coating technique and determined with physicochemical characteristics by X–ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen physisorption measurements (BET), infrared spectroscopy (IR), thermogravimetric analysis (TGA), and ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS).

9p cumeo3000 01-08-2018 56 1   Download

In this work, 200-nm-thick PZT films were successfully fabricated on Nb:STO substrates by a solution process. One obtained that PZT(111) peak started to appear on the Nb:STO substrate at a low annealing temperature of 450oC. Also, scanning electron microscopy observation shows smooth and homogeneous surface of PZT films on Nb:STO substrate with no grain boundary, which evidences for epitaxial-like growth of PZT thin films. Remnant polarization of 6 µC/cm2 and leakage current of 8×10-8 A were obtained at applied voltage of 5 V.

9p truongtien_09 08-04-2018 45 1   Download