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The low laser-induced damage threshold (LIDT) of HfO/SiO films is an important factor in limiting the further development of high repetition rate femtosecond (fs) laser systems. Conventional whole-layer annealing can effectively improve the properties of SiO films, but it is difficult to improve the properties of HfO films located in the intermediate layer and is also prone to introduce contaminants. In this study, an innovative magnetron sputtering-vacuum tube furnace combined system was presented to deposit and anneal the HfO/SiO films without contaminant.
View Article and Find Full Text PDFControllable Fabrication of Gallium Ion Beam on Quartz Nanogrooves.
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August 2024
School of Electro-Mechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Nanogrooves with high aspect ratios possess small size effects and high-precision optical control capabilities, as well as high specific surface area and catalytic performance, demonstrating significant application value in the fields of optics, semiconductor processes, and biosensing. However, existing manufacturing methods face issues such as complexity, high costs, low efficiency, and low precision, especially in the difficulty of fabricating nanogrooves with high resolution on the nanoscale. This study proposes a method based on focused ion beam technology and a layer-by-layer etching process, successfully preparing V-shaped and rectangular nanogrooves on a silicon dioxide substrate.
View Article and Find Full Text PDFElectrochromic Performance of Sputtered NbTi-Based Mixed Metal Oxide Thin Films with a Metallic Seed Layer.
ACS Omega
January 2023
CSIR-Central Electrochemical Research Institute, Karaikudi, Tamilnadu630 003, India.
An attempt has been made to promote the efficiency of the electrochromic (EC) windows to perform at a faster switching rate with good coloration and easy recyclability. In this work, ion-assisted pulsed DC unbalanced confocal magnetron sputtering is used to fabricate mixed metal oxide thin films of Nb and Ti (which are termed as NTO) for EC applications. Further, to increase the EC efficiency of this film, a very thin metallic seed layer is incorporated between the substrate and the film using the layer-by-layer (LBL) coating strategy.
View Article and Find Full Text PDFAntibacterial Coatings for Titanium Implants: Recent Trends and Future Perspectives.
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Centre for Biomaterials, Cellular and Molecular Theranostics (CBCMT), Vellore Institute of Technology, Vellore 632014, India.
Titanium and its alloys are widely used as implant materials for biomedical devices owing to their high mechanical strength, biocompatibility, and corrosion resistance. However, there is a significant rise in implant-associated infections (IAIs) leading to revision surgeries, which are more complicated than the original replacement surgery. To reduce the risk of infections, numerous antibacterial agents, e.
View Article and Find Full Text PDFAtomic-Scale Dynamics at Solid-Liquid Nanointerfaces Induced by Electron-Beam Irradiation.
Nano Lett
December 2022
R&D Center, Sony Group Corporation, 4-14-1 Asahi-cho, Atsugi, Kanagawa243-0014, Japan.
We report electron-beam induced dynamics at PbS-Pb solid-liquid interfaces. We fabricated PbS-Pb solid-liquid nanointerfaces by heating PbS nanocrystals under vacuum to observe the entire process of structural evolution at the atomic scale. We investigated the dynamics using time-resolved high-angle annular dark-field imaging.
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