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The Effect of H Fluence Irradiation on the Optical, Structural, and Morphological Properties of ZnO Thin Films.
Materials (Basel)
December 2024
Departamento de Física, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico.
Polycrystalline zinc oxide (ZnO) thin films were deposited on soda-lime glass substrates using the chemical spray pyrolysis method at 450 °C. The samples were irradiated with 8 keV H ions at three different fluences using a Colutron ion gun. The effects of the irradiation on the structural, morphological, and optical properties were studied with different techniques, including Rutherford Backscattering Spectrometry (RBS), X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), and Ultraviolet and Visible Spectroscopy (UV-Vis).
View Article and Find Full Text PDFZrN-Based Multilayers Prepared by Reactive Sputtering as Coatings for Electrode Plates of Proton Exchange Membrane Water Electrolyzers.
ACS Appl Mater Interfaces
December 2024
Departamento de Ingeniería Química y Medio Ambiente, Escuela Técnica Superior de Ingenieros Industriales, Universidad Politécnica de Madrid, Madrid 28006, Spain.
ZrN and TiN thin coatings have been investigated for use on stainless steel for bipolar plates of proton exchange membrane water electrolyzers. Films were deposited by reactive magnetron sputtering using Ar and N from metallic Zr and Ti targets on different substrates to perform a deep characterization of their relevant properties. The effect of the deposition parameters, such as N/Ar ratio, working pressure, or supplied power, has been explored.
View Article and Find Full Text PDFAn automatic multi-precursor flow-type atomic layer deposition system.
Rev Sci Instrum
November 2024
Finishing Manufacturing Science (Sigma-2), Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545, USA.
Designs for two automated atomic layer deposition (ALD) flow reactors are presented, and their capabilities for coating additively manufactured (AM) metal prints are described. One instrument allows the coating of several AM parts in batches, while the other is useful for single part experiments. To demonstrate reactor capabilities, alumina (Al2O3) was deposited onto AM 316L stainless steel by dosing with water (H2O) vapor and trimethylaluminum (TMA) and purging with nitrogen gas (N2).
View Article and Find Full Text PDFAnisotropy of radiation-induced defects in Yb-implanted β-GaO.
Sci Rep
October 2024
Inst. of Physics, Polish Acad. of Sciences, Aleja Lotnikow 32/46, Warsaw, PL-02668, Poland.
RE-doped β-GaO seems attractive for future high-power LEDs operating in high irradiation environments. In this work, we pay special attention to the issue of radiation-induced defect anisotropy in β-GaO, which is crucial for device manufacturing. Using the RBS/c technique, we have carefully studied the structural changes caused by implantation and post-implantation annealing in two of the most commonly used crystallographic orientations of β-GaO, namely the (-201) and (010).
View Article and Find Full Text PDFEvaluating Nondestructive Quantification of Composition Gradients in Metal-Organic Frameworks by MeV Ion Microbeam Analysis.
Anal Chem
September 2024
Department of Physics and Astronomy, Uppsala University, SE-751 20 Uppsala, Sweden.
We evaluate a method to quantify composition depth gradients in intact metal-organic framework (MOF) single crystals and thereby derive diffusion coefficients of postsynthetically incorporated active sites by nondestructive ion-beam microanalysis. Zr-based UiO-67-bpy (bpy = 2,2'-bipyridine-5,5'-dicarboxylic acid) MOFs were synthesized on Si substrates and then metalated postsynthetically with NiCl for 2-48 h, resulting in different Ni depth distributions. Simultaneous micro-Rutherford backscattering spectrometry (μ-RBS) and micro-particle induced X-ray emission (μ-PIXE) analysis were used for the spatially resolved chemical analysis of the MOF single crystals.
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