scholarly journals The Morphological Changes of SnS Thin Films Deposited on Stainless-Steel Substrates at Low Temperatures

2019 ◽  
Vol 4 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Leticia Treviño Yarce ◽  
Enrique Rosendo Andres ◽  
Roman Romano Trujillo ◽  
Crisoforo Morales Ruiz ◽  
Tomas Diaz Becerril ◽  
...  
Keyword(s):  
Thin Films ◽  
Stainless Steel ◽  
Morphological Changes ◽  
Xrd Analysis ◽  
Tin Sulfide ◽  
Diffraction Peaks ◽  
Ss Substrates ◽  
Sns Thin Films ◽  
Steel Substrates ◽  
By Products

Orthorhombic tin sulfide (SnS) thin films have been deposited on stainless steel (SS) substrates by Chemical Bath Deposition (CBD) at 25, 35 and 70 °C with a deposit time of 8 hours each one. XRD analysis showed that samples obtained at 25 °C and 70 °C present very small diffraction peaks. This can be attributed in the case of the sample obtained at 25 degrees, that the crystallization process is not completed because the temperature is so low and in case of the sample deposited at 75 degrees, a redissolution of the material is carried out. However, sample obtained at 35 °C was polycrystalline with orthorhombic structure and preference plane (111). All samples showed the Raman vibrational modes TO and LO of the SnS and confirms that the samples do not have by-products. It was observed from SEM micrographs that the films consisted of spheres for the sample deposited at 25 °Candsmall flakes for the other samples. From diffuse reflectance measurements the optical band gap calculated was between 1.45 eV to 1.59 eV.

scholarly journals Silica-Copper Oxide Composite Thin Films as Solar Selective Coatings Prepared by Dipping Sol Gel

2008 ◽  
Vol 2008 ◽  
pp. 1-5 ◽  
Author(s):  
E. Barrera-Calva ◽  
J. Méndez-Vivar ◽  
M. Ortega-López ◽  
L. Huerta-Arcos ◽  
J. Morales-Corona ◽  
...  
Keyword(s):  
Thin Films ◽  
Stainless Steel ◽  
Copper Oxide ◽  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Silica Matrix ◽  
Composite Thin Films ◽  
X Ray ◽  
Molar Ratios ◽  
Steel Substrates

Silica-copper oxide (silica-CuO) composite thin films were prepared by a dipping sol-gel route using ethanolic solutions comprised TEOS and a copper-propionate complex. Sols with different TEOS/Cu-propionate (Si/Cu) molar ratios were prepared and applied on stainless steel substrates using dipping process. During the annealing process, copper-propionate complexes developed into particulate polycrystalline CuO dispersed in a partially crystallized silica matrix, as indicated by the X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses. The gel thermal analysis revealed that the prepared material might be stable up to400°C. The silica-CuO/stainless steel system was characterized as a selective absorber surface and its solar selectivity parameters, absorptance (α), and emittance (ε) were evaluated from UV-NIR reflectance data. The solar parameters of such a system were mostly affected by the thickness and phase composition of theSiO2-CuO film. Interestingly, the best solar parameters (α= 0.92 andε= 0.2) were associated to the thinnest films, which comprised a CuO-Cu2Omixture immersed in the silica matrix, as indicated by XPS.

scholarly journals Sol–Gel Synthesis and Characterization of Coatings of Mg-Al Layered Double Hydroxides

Materials ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 3738 ◽  
Author(s):  
A. Smalenskaite ◽  
M. M. Kaba ◽  
I. Grigoraviciute-Puroniene ◽  
L. Mikoliunaite ◽  
A. Zarkov ◽  
...  
Keyword(s):  
Thin Films ◽  
Layered Double Hydroxides ◽  
Sol Gel ◽  
Xrd Analysis ◽  
Dip Coating ◽  
Dipping Process ◽  
Synthetic Approaches ◽  
Sol Gel Synthesis ◽  
Double Hydroxides ◽  
Steel Substrates

In this study, new synthetic approaches for the preparation of thin films of Mg-Al layered double hydroxides (LDHs) have been developed. The LDHs were fabricated by reconstruction of mixed-metal oxides (MMOs) in deionized water. The MMOs were obtained by calcination of the precursor gels. Thin films of sol–gel-derived Mg-Al LDHs were deposited on silicon and stainless-steel substrates using the dip-coating technique by a single dipping process, and the deposited film was dried before the new layer was added. Each layer in the preparation of the Mg-Al LDH multilayers was separately annealed at 70 °C or 300 °C in air. Fabricated Mg-Al LDH coatings were characterized by X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), and atomic force microscopy (AFM). It was discovered that the diffraction lines of Mg3Al LDH thin films are sharper and more intensive in the sample obtained on the silicon substrate, confirming a higher crystallinity of synthesized Mg3Al LDH. However, in both cases the single-phase crystalline Mg-Al LDHs have formed. To enhance the sol–gel processing, the viscosity of the precursor gel was increased by adding polyvinyl alcohol (PVA) solution. The LDH coatings could be used to protect different substrates from corrosion, as catalyst supports, and as drug-delivery systems in medicine.

Effects of LNO buffer layers on electrical properties of BFO-PT thin films on stainless steel substrates

2019 ◽  
Vol 784 ◽  
pp. 231-236 ◽  
Author(s):  
Susu Wang ◽  
Hao Wang ◽  
Jie Jian ◽  
Jianguo Chen ◽  
Jinrong Cheng
Keyword(s):  
Thin Films ◽  
Stainless Steel ◽  
Electrical Properties ◽  
Buffer Layers ◽  
Steel Substrates

Optical Properties of β-RDX Thin Films Deposited on Gold and Stainless Steel Substrates Calculated from Reflection–Absorption Infrared Spectra

2017 ◽  
Vol 71 (8) ◽  
pp. 1990-2000 ◽  
Author(s):  
José L. Ruiz-Caballero ◽  
Joaquín A. Aparicio-Bolaño ◽  
Amanda M. Figueroa-Navedo ◽  
Leonardo C. Pacheco-Londoño ◽  
Samuel P. Hernandez-Rivera
Keyword(s):  
Thin Films ◽  
Stainless Steel ◽  
Optical Properties ◽  
Infrared Spectra ◽  
Steel Substrates

Effect of Temperature on Structural and Optical Properties of Chemically Deposited Tin Sulfide Thin Films Suitable for Photovoltaic Structures

2013 ◽  
Vol 665 ◽  
pp. 93-100 ◽  
Author(s):  
T.H. Patel
Keyword(s):  
Thin Films ◽  
Band Gap ◽  
Xrd Analysis ◽  
Buffer Layers ◽  
Effect Of Temperature ◽  
Tin Sulfide ◽  
X Ray ◽  
Glass Substrates ◽  
Average Grain Size ◽  
Deposited Films

SnS (tin sulphide) is of interest for use as an absorber layer and the wider energy band gap phases e.g. SnS2, Sn2S3and Sn/S/O alloys of interest as Cd-free buffer layers for use in thin film solar cells. Thin films of tin sulphide have been deposited using CBD at three different bath temperatures (27, 35 and 45 °C) onto microscope glass substrates. The X ray diffraction (XRD) analysis of the deposited films reveled that all films has orthorhombic SnS phase as dominant one with preferred orientations along (111) direction. The temperature influence on the crystalline nature and the presence of other phases of SnS has been observed. The average grain size in the films determined from Scherers formula as well as from Williamson-Hall-plot method agrees well with each other. Energy dispersive X-ray (EDAX) analysis used to determine the film composition suggested that films are almost stoichiometric. The scanning electron microscopy (SEM) reveals that deposited films are pinhole free and consists of uniformly distributed spherical grains. The optical analysis in the 200-1200 nm range suggests that direct allowed transitions are dominant in the absorption process in the films with variation in the band gap (~1.79 to ~2.05 eV) due to variation in deposition temperature.

Load- and Depth-Sensing Indentation Tester for Properties Measurement at Non-Ambient Temperatures

1993 ◽  
Vol 308 ◽  
Author(s):  
Karl B. Yoder ◽  
Donald S. Stone
Keyword(s):  
Thin Films ◽  
Stainless Steel ◽  
Temperature Dependence ◽  
Preliminary Data ◽  
Depth Sensing ◽  
Nanometer Resolution ◽  
Ambient Temperatures ◽  
Experimental Apparatus ◽  
Steel Substrates

ABSTRACTThe ability to measure the temperature-dependence of the hardness of thin films is useful from both an applications and a scientific standpoint. For this reason, we have designed and constructed a load- and depth-sensing indentation tester combining sub-nanometer resolution with the ability to operate over a range of temperatures, currently 150K to 400K. This paper describes the new experimental apparatus and reports preliminary data on 440C stainless steel substrates with and without a 0.75 μm ZrN coating.

scholarly journals Electrocatalytic properties of hydroxyapatite thin films electrodeposited on stainless steel substrates

2017 ◽  
Vol 6 (6) ◽  
pp. 255-266 ◽  
Author(s):  
Ahmed Chennah ◽  
Yassine Naciri ◽  
Hassan Ait Ahsaine ◽  
Aziz Taoufyq ◽  
Bahcine Bakiz ◽  
...  
Keyword(s):  
Thin Films ◽  
Stainless Steel ◽  
High Performance ◽  
Degradation Kinetics ◽  
Electrolytic Solution ◽  
Experimental Conditions ◽  
Energy Dispersion Spectroscopy ◽  
X Ray ◽  
Electrocatalytic Properties ◽  
Ss Substrates

In this work, we have investigated the structural, microstructural, and electrocatalytic properties of hydroxyapatite (HAp) thin films. The HAp films were electrodeposited on stainless-steel (SS) substrates by chronopotentiometry mode from an electrolytic solution. The HAp films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray energy dispersion spectroscopy (EDS). The electrodeposition and electrochemical processes of the hydroxyapatite (HAp) phase were studied by cyclic voltammetry. This HAp/SS system acting as an anode was used for the first time to electrodegrade Rhodamine B (RhB) in aqueous solutions. To follow the degradation kinetics, we used UV-visible spectroscopy. Several parameters such as the current density and the initial concentration of electrolytic solution were determined to optimize the electrodegradation of RhB. The decrease of RhB concentration followed pseudo-first order kinetics law. The rate of RhB degradation in presence of HAp/SS electrode can reach interesting high performance, depending on the electrocatalysis experimental conditions.

Sign in / Sign up

Export Citation Format

Share Document