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54. Thin film metallic glasses: Properties, applications and future.

Author

Yiu, Pakman, Diyatmika, Wahyu, Bönninghoff, Niklas, Lu, Yi-Chi, Lai, Bo-Zhang, and Chu, Jinn P.

Subjects
METALLIC thin films, METALLIC glasses, MANUFACTURING processes, CORROSION resistance, RESEARCH & development
Abstract

In this article, we provide a perspective overview of the iconic properties, recent application-oriented research, and future commercialization opportunities of thin film metallic glasses (TFMGs). A brief review on the preparation and fundamental properties of TFMGs will be given first. TFMGs possess attractive properties such as corrosion resistance, extremely low roughness, and antibacterial characteristics, which give rise to various applications in biomedical devices, sensors, and tribology. Therefore, a number of our representative works will be reviewed to showcase the benefits of TFMGs over traditional materials and processing in these applications. In addition, new perspectives in the research and development of TFMGs and opportunities for commercialization will also be highlighted. [ABSTRACT FROM AUTHOR]

Published
2020
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55. Fabrication of plasma-reduced silver coupled with titanium dioxide nanoparticles for visible light-driven photocatalysis.

Author

Montallana, Arantxa Danielle S., Angeles, Joven Paolo D., Chu, Jinn P., Sherburne, Matthew P., Vasquez Jr., Magdaleno R., and Wada, Motoi

Subjects
TITANIUM dioxide nanoparticles, X-ray photoelectron spectroscopy, SURFACE analysis, PHOTOCATALYSIS, ULTRAVIOLET-visible spectroscopy, DYES & dyeing, SILVER phosphates
Abstract

The photocatalytic activity of titanium dioxide (TiO 2) was improved by forming a matrix containing silver (Ag) nanoparticles (NPs) prepared by a plasma process. The plasma-assisted reduction process successfully formed metallic Ag on the surface of the TiO 2 NP matrix to create the Ag-TiO 2 Janus heterostructure. The synthesized NPs were characterized using Brunauer, Emmett, and Teller surface analysis, transmission electron microscopy, x-ray diffraction spectroscopy, x-ray photoelectron spectroscopy, Raman spectroscopy, and UV-vis spectroscopy. Photocatalytic dye decomposition experiments revealed up to 96% methylene blue removal after 4 h of visible light irradiation, a fivefold increase in removal efficiency compared to using TiO 2 NPs only. [ABSTRACT FROM AUTHOR]

Published
2023
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58. Zinc gallate (ZnGa2O4) epitaxial thin films : determination of optical properties and bandgap estimation using spectroscopic ellipsometry

Author

Bairagi, Samiran, Hsiao, Ching-Lien, Magnusson, Roger, Birch, Jens, Chu, Jinn P., Tarntair, Fu-Gow, Horng, Ray-Hua, Järrendahl, Kenneth, Bairagi, Samiran, Hsiao, Ching-Lien, Magnusson, Roger, Birch, Jens, Chu, Jinn P., Tarntair, Fu-Gow, Horng, Ray-Hua, and Järrendahl, Kenneth

Abstract

Electronic grade ZnGa2O4 epitaxial thin films were grown on c-plane sapphire substrates by metal-organic chemical vapor deposition and investigated using spectroscopic ellipsometry. Their thickness, roughness and optical properties were determined using a Multiple Sample Analysis based approach by the regression analysis of optical model and measured data. These samples were then compared to samples which had undergone ion etching, and it was observed that etching time up to four minutes had no discernible impact on its optical properties. Line shape analysis of resulting absorption coefficient dispersion revealed that ZnGa(2)O(4 )exhibited both direct and indirect interband transitions. The modified Cody formalism was employed to determine their optical bandgaps. These values were found to be in good agreement with values obtained using other popular bandgap extrapolation procedures. Published by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published articles title, journal citation, and DOI., Funding Agencies|Vetenskapsradet [2018-04198]; Stiftelsen foer Strategisk Forskning [2009-00971]; STINT foundation [MG2019-8485]; Wafer Works Corporation; Ministry of Science and Technology [109-2221-E-009-143-MY3, 109-2622-E-009-033, 109-2634-F-009-028, 109-2224-E-009-002, 110-2218-E-A49-020-MBK, 110-2622-8-009-018-SB, 110-2224-E-A49-003, 111-2923-E-A49-003-MY3]; MAtek [2021-T-006]

Published
2022
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95. Preface: the Biennial TACT International Thin Films Conference (TACT 2015)

Author

Huang, Jia-Hong, primary, Chang, Li, additional, Chu, Jinn P., additional, Hsieh, Jang-Hsing, additional, Huang, Bohr-Ran, additional, Lin, Ming-Tzer, additional, Liu, Chuan-Pu, additional, Shen, Yu-Lin, additional, Ting, Jyh-Ming, additional, Wong, Ming-Show, additional, Wu, Jih-Jen, additional, and Yang, Yung-Chin, additional

Published
2016
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96. Non-stick syringe needles : Beneficial effects of thin film metallic glass coating

Author

Chu, Jinn P., Yu, Chia-Chi, Tanatsugu, Yusuke, Yasuzawa, Mikito, Shen, Yu-Lin, Chu, Jinn P., Yu, Chia-Chi, Tanatsugu, Yusuke, Yasuzawa, Mikito, and Shen, Yu-Lin

Abstract

This paper reports on the use of Zr-based (Zr53Cu33Al9Ta5) thin film metallic glass (TFMG) for the coating of syringe needles and compares the results with those obtained using titanium nitride and pure titanium coatings. TFMG coatings were shown to reduce insertion forces by ∼66% and retraction forces by ∼72%, when tested using polyurethane rubber block. The benefits of TFMG-coated needles were also observed when tested using muscle tissue from pigs. In nano-scratch tests, the TFMG coatings achieved a coefficient of friction (COF) of just ∼0.05, which is about one order of magnitude lower than those of other coatings. Finite-element modeling also indicates a significant reduction in injection and retraction forces. The COF can be attributed to the absence of grain boundaries in the TFMG coating as well as a smooth surface morphology and low surface free energy.

Published
2016

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