Combinatorial surface nanostructuring in aluminium-niobium system

Mardare, Andrei Ionut; Huber, S.; Mardare, Cezarina Cela; Bradt, Elke; Hild, Sabine; Hassel, Achim Walter

doi:10.1016/j.apsusc.2019.143943

Cited by 4 publications

(1 citation statement)

References 24 publications

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“…The GLAD process involving a single source has become a well-redounded method since a wide range of nanostructures can be obtained playing with only two key parameters: The deposition angle α (angle between the substrate normal and the incident vapor flux direction), and the angle φ measuring the substrate rotation about its normal. Since the 1997 article published by Robbie and Brett 13 , many investigations have been devoted to the development of original GLAD film's nanostructures with one vapor source but till now, a very few studies involving at least two sources have been reported [18][19][20][21][22] . The geometry of the sputtering set-up is the starting key parameter to generate the fabrication of complex architectures (e.g., Janus-like structure).…”

Section: Resultsmentioning

confidence: 99%

Checkerboard-like structure in columnar W–Mo thin films

Martin

Cote

Boukhalfa

et al. 2022

Funct. Mater. Lett.

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Implementing bottom-up approaches to control the columnar architecture of thin films at the nanoscale is a powerful tool for developing surface properties. While inclined columns, zigzags or helices made of a single material are now commonly produced by oblique angle deposition processes, the creation of more complex and original structures associating at least two different materials still remains a challenging task, even more on silicon substrate. Herein, we show how to prepare tungsten/molybdenum columns exhibiting a checkerboard-like structure with motifs of a few tens of nanometers. Although understanding the growth phenomena becomes more problematic when two components are simultaneously provided during the film fabrication, this original combination of controlled mosaics in columnar thin films enables new opportunities to produce some unusual nanostructures for functional materials.

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Section: Resultsmentioning

confidence: 99%

Checkerboard-like structure in columnar W–Mo thin films

Martin

Cote

Boukhalfa

et al. 2022

Funct. Mater. Lett.

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Corrosion Study of Picosecond‐Laser Structured and Anodized Ti6Al4V for Bone Screws

Knapic,

Mardare,

Voss

et al. 2024

Physica Status Solidi (a)

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A corrosion study is performed on six variations of titanium grade 5 (Ti6Al4V) samples. Samples are prepared in different conditions by variation of preanodization, postanodization, and picosecond‐laser (ps‐laser) surface treatment, while polished and anodized samples serve as reference. Microcones and nanosized periodic surface features are successfully produced on Ti6Al4V samples. The morphology and topography of the structures are visualized by scanning electron microscopy and white light interference microscopy. Furthermore, the relative electrochemically active surface area (ECSA) is determined for the ps‐laser‐treated samples. It is determined that the preanodized and laser‐treated sample has 3.5 times larger ECSA than a polished sample, and that the laser‐treated sample has 4.1 times larger area. Moreover, Tafel analysis is performed to determine the corrosion properties of the samples. It is shown that the corrosion resistance improves for both laser‐structured samples after the anodization. To further study the surface of the samples, electrochemical impedance spectroscopy measurements are conducted. The study indicates that the ps‐laser‐treated and anodized Ti6Al4V is suitable to be used for the fabrication of bone screws and plates due to its improved corrosion resistance as compared to nonanodized samples.

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