Recent Developments in Biological, Structural and Functional Thin Films and Coatings: Poster Session
Sponsored by: TMS Functional Materials Division, TMS: Thin Films and Interfaces Committee
Program Organizers: Adele Carrado, University of Strasbourg; Heinz Palkowski, Clausthal University of Technology; Gerald Ferblantier, University of Strasbourg - IUT LP / ICube Laboratory - CNRS; Ramana Chintalapalle, University of Texas at El Paso; Nuggehalli Ravindra, New Jersey Institute of Technology; Nancy Michael, University of Texas at Arlington; Vikas Tomar, Purdue University
Monday 5:30 PM
February 24, 2020
Room: Sails Pavilion
Location: San Diego Convention Ctr
Cancelled
B-27: Characterization of Rubber Seed Oil Modified for Biolubricant Feedstock Application: Farouk Mohammed1; Isiaka Bakare1; Felix Okieimen2; 1Rubber Research Institute of Nigeria; 2 University of Benin
Rubber seed oil as a non-edible oil is a potential cheap source for biolubricant feedstock. In this study, the oil is modified to improve the inherent properties limiting its applicability. Preparations of samples were carried out by epoxidizing the oil, simultaneously opening the oxirane ring and trans-esterification, and finally acetylation. A significant decrease was observed in the iodine value after epoxidation. The prepared products from each stage showed viscosities greater than ISO VG 46 requirement for hydraulic oils and are within the range of ISO VG 150 and ISO VG 220 for extreme pressure gear oils and slide way oils respectively. Their relatively high viscosities at high temperature and high viscosity indices make them suitable for high temperature and wide temperature range application. Their low-temperature application prospects are fairly good due to their relatively high pour point values. Hence, they require pour point depressant to enhance their low-temperature applicability.
B-29: Effect of Post-Deposition Annealing on the Structural and Optical Properties of Sputter-Deposited Ga2O3 Thin Films: Nanthakishore Makeswaran1; Anil Krishna Battu1; C.V. Ramana1; 1University Of Texas, El Paso
In recent years wide bandgap semiconductors have been the subject of extensive research due to their potential use a variety of technological applications ranging from photonics to catalysis and magneto electronics. Gallium oxide (Ga2O3), the second largest wide-bandgap material exhibits multiple structures, with useful material properties as well as chemical and thermal stability. Experiments were done to determine the effects on nanocrystalline gallium oxides’ electronic structure, chemical bonding properties, and band gap. The samples, which were magnetron sputter deposited onto Si(100) substrates at 500˚C, where annealed in heat treatment furnaces in a range of temperatures from 500-900˚C and where evaluated through the use of XRD, Raman Spectroscopy and XPS measurements. Results indicate improved structural quality and packing density upon post annealing. The effect of post-deposition annealing on the crystallization, chemical bonding and optical properties discussed.
B-30: Fabrication and Characterization of BiCuSeO Epitaxial Films as the Bottom Electrode of All-oxide Spin Valve: Che Ming Lin1; Kin Hou Lao1; 1Department of MSE, NCKU
In the all-oxide spin valve, BiFeO3 has a great potential to be used as the pinning layer because of its antiferromagnetic, high ferroelectric polarization value, and coupling of magnetic-electric domains. To prevent electron current leaking of BiFeO3, it is necessary for a bottom electrode on which BiFeO3 films can grow epitaxially with a high electrical conductivity and high stability. However, the electrode is usually deposited by using pulsed laser deposition method, which is time-consuming and high-cost. In this study, we propose an alternative way to deposit the bottom electrode film epitaxially by employing RF magnetron sputter. The BiCuSeO film was deposited as the bottom electrode on an (001)-SrTiO3 substrate, and the (00l) texture was observed by using X-ray diffraction. Conductivity was found significantly improved comparing with the non-textured bulk material characterized by the Hall measurement. We believe that this method opens a door on designing the next-generation all-oxide spin valve.
B-31: Nanotubular Oxide Layers Enhancing Biological Potential of β Titanium Alloys for Biomedical Application: Anna Majchrowicz1; Agata Roguska2; Małgorzata Lewandowska1; 1Warsaw University of Technology; 2Institute of Physical Chemistry of the Polish Academy of Sciences
The objective of this study is to enhance biological properties of new generation titanium alloys with high volume fraction of β phase. The improvement is going to be achieved by manufacturing of oxide nanotubular structure on their surface. The main advantages of the novel Ti alloys with β structure are the reduced Young's modulus as well as the fact that they contain only vital elements with no toxicity. Therefore, they show great potential for applications in many fields of medicine, including the orthopedics and dentistry.In this particular study, we fabricated nanostructural surface modifications on Ti-24Nb-4Zr-8Sn and Ti-13Zr-13Nb alloys via electrochemical anodization in order to enhance their biological potential. The morphology of such surface modifications were characterized using scanning electron microscopy. The biological potential of the layers was evaluated by measuring their wettability and chemical stability using inductively coupled plasma mass spectrometry as well as incubation in artificial body fluid.
B-32: Preparation and Uniformity Analysis of Sol-Gel TiO2 Thin Films: Jihui Luo1; Lijuan Xiang1; Ruyi Yang1; Yang Li1; 1Yangtze Normal University
TiO2 film is widely used in photocatalysis technology and has important application value in treating sewage, purifying air, utilizing solar energy, and self-cleaning. In this paper, the TiO2 film was prepared by sol-gel method using butyl silicate, anhydrous ethanol and acetyl acetone. Sintering temperature is 380 °C and 530 °C. Microstructures are characterized by XRD and optical microscopy. The results show that the film sintered at 530 °C is a brookite, and the film sintered at 380 °C is anatase. The diffraction intensity increases as the number of layers increases. The surface of the TiO2 film prepared by the surface cover slide is flat and uniform.