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Dataphysics Instruments, a leading company in the field of surface and interface analysis, opens a technical office in Metz, France.

Dataphysics Instruments, manufacturer of high-precision laboratory instruments for the characterization of interfaces and surfaces, has expanded its presence in France. According to the company, France offers great potential as it is home to companies from many industries, such as automotive, electronics, aerospace and medical technology.

Fully equipped application laboratory

The new location in Metz has a fully equipped application laboratory. Nils Langer, Managing Director of Dataphysics Instruments, says: “The modular system and the intuitive handling of our devices and their software can best be experienced in practice. That’s why we invite interested scientists to our application laboratory to get to know our devices and their measurement methods. Of course, initial measurements on your own samples are also possible.”

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The chemical company Covestro recorded a decline in sales last year. Despite a loss of 198 million euros in the past year, the company is aiming for an operating profit of between 1.0 and 1.6 billion euros in 2024.

The chemicals group Covestro is taking a cautious view of the new year in a difficult environment. The focus remains on efficiency, according to the company. The DAX-listed company had already prevented an even more significant decline in the operating result in 2023 by making savings. There was no news on the talks with Abu Dhabi National Oil (Adnoc) regarding a possible takeover of the DAX-listed company by the oil group from the United Arab Emirates.

In 2023, Covestro felt the effects of the slump in the Chinese property sector, the weakness of the construction industry and the reluctance of many people to buy consumer electronics, household appliances and furniture. With sales down by a fifth to 14.4 billion euros, Covestro suffered a loss of 198 million euros last year. Shareholders will once again go away empty-handed after no dividend was paid for 2022 due to a loss of 272 million euros.

The Group’s earnings before interest, taxes, depreciation and amortisation (EBITDA) fell by a third to just under 1.1 billion euros in 2023. The fact that the decline was not even more pronounced was due to a reduction in fixed costs by a mid-triple-digit million euro amount. In addition, the energy efficiency of production facilities in Shanghai, China, and in Dormagen, Germany, was increased. This year, Covestro CEO Markus Steilemann is targeting an operating profit of 1.0 to 1.6 billion euros, which in the best-case scenario would be the same as in 2022.

A team, co-led by researchers at Penn State, has developed a synthesis process to produce a ‘rust-resistant’ coating with additional properties ideal for creating faster, more durable electronics.

The future of technology has an age-old problem – rust. When iron-containing metal reacts with oxygen and moisture, the resulting corrosion greatly impedes the longevity and use of parts in the automotive industry. While it’s not called ‘rust in the semiconductor industry, oxidation is especially problematic in two-dimensional (2D) semiconductor materials. It controls the flow of electricity in electronic devices, because any corrosion can render the atomic-thin material useless. 2D materials are ultra-thin, just one or a few atoms thick. They hold promise for advanced semiconductors because their thinness provides a shorter and more direct path for electrons to move quickly and with less resistance through the material. This in turn allows for faster and more efficient electronic performance.

Semiconductors are materials that conduct electricity under some conditions but not others, making them ideal for controlling electrical currents in electronic devices. Electronic devices, the ‘brains’ of computer chips, are made from these materials. “One of the biggest issues that we see in 2D semiconductor research these days is the fact that the materials oxidize quickly,” said Joshua Robinson, professor of materials science and engineering and co-corresponding author of the work. “You need to ensure their long-term reliability because these are going into transistors or sensors that are supposed to last years. Right now, these materials don’t last more than a week out in the open.”

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Made of amorphous boron nitride

Traditional methods to protect these materials from rusting involve oxide-based coatings, but these processes often use water, which ironically can accelerate the very oxidation they aim to prevent. The team’s approach to this problem was to seek a coating material and method that could avoid the use of water entirely. Enter amorphous boron nitride (a-BN).

“We wanted to get away from using water in the process so we started thinking about what sort of 2D materials we can make that do not use water in its processing, and amorphous boron nitride is one of those,” said Robinson. A non-crystalline form of boron nitride, a-BN is known for its high thermal stability and electrical insulation properties, making it ideal for use in semiconductors to insulate components, prevent unwanted electrical currents and improve device performance.

Robinson explained that a-BN a has high dielectric strength, a measurement indicating the material’s ability to withstand high electric fields without breaking down, a critical factor for reliable electronic performance. “The high dielectric strength demonstrated by a-BN is comparable to the best dielectrics available, and we don’t need water to make it,” Robinson said. “What we demonstrated in the paper was that including amorphous boron nitride yields improved device performance compared to conventional dielectrics alone.”

Two-step Atomic Layer Deposition Method

While the coating helped produce a better 2D transistor, getting the coating on the 2D materials proved a challenge, according to Robinson. Two-dimensional materials lack dangling bonds, which are unpaired electrons on the surface of a material that react or bond with other atoms. A standard single-step process that uses higher temperatures to coat the materials resulted in uneven and discontinuous coatings, well below the quality electronics need to function properly.

To evenly coat 2D materials with the a-BN, the team developed a new two-step atomic layer deposition method. It involves first depositing a thin low-temperature a-BN ‘seed layer’ before heating up the chamber to typical deposition temperatures between 250 and 300°C. This not only allowed the researchers to produce an even a-BN coating over the 2D semiconductors but also led to a 30% to 100% improvement — depending on the transistor design — in transistor performance compared to devices not utilizing the a-BN.

“When you sandwich 2D semiconductors between the amorphous boron nitride, even though it’s amorphous, you end up with a smoother electronic road, so to speak, that would enable improved electronics,” stated Robinson. “The electrons can go faster through the 2D material than they could if they were between other dielectric materials.” He noted that even with its high dielectric strength, researchers have only scratched the surface of a-BN’s potential as a dielectric material for semiconductor devices. “We have room for improvement even though it’s already outperforming other dielectric materials,” added Robinson. “The primary thing that we’re trying to do right now is improve the overall quality of the material and then integrate it into some complex structures you would see in future electronics.”

Source: The Pennsylvania State University

Researchers found that the newly developed hydrosilylated water-based organosilicone coatings have excellent anti-fouling properties, allowing water, ethanol, muddy water and other liquids to bead cleanly and oily marks to be easily wiped off.

Under the background of “Dual Carbon” strategy, the coating technology of silicon-based materials replacing carbon-based materials has become a research hotspot. Owing to high-viscosity characteristic of raw materials involving divinyl-terminated polydimethylsiloxane (ViPDMSVi) and reinforcing components, existing approaches for the preparation of organosilicon coatings by hydrosilylation still consume a large amount of organic solvents, causing environmental pollution and inconsistent with the low-carbon strategy. Herein, a robust strategy to prepare hydrosilylation waterborne organosilicon coatings via rational design of the emulsification system to obtain two-component aqueous emulsions is reported. In this strategy, two reactive organosilicon surfactants were synthesized and compounded with corresponding anionic surfactants for emulsification of vinyl organosilicon components and polymethylhydrosiloxane (PMHS), respectively.

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The resultant two emulsions were cured via hydrosilylation to obtain the desired coating. Additionally, vinyl MQ resin was selected as reinforcing component to increase the density of the coating. The facts that water, ethanol, mud water and other common liquids can slide off cleanly, and oily markers on the coating surface can be easily wiped off, indicate the outstanding anti-fouling properties of the coating. Furthermore, even under various harsh environments such as high temperature, ultraviolet radiation and chemical corrosion, the coating still shows good anti-fouling performance. This work opens up a viable avenue for the preparation of waterborne organosilicon anti-fouling coatings.

Source: Progress in Organic Coatings, Volume 185.

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Evonik has invested in the British company Interface Polymers. This company’s additives simplify the processing of plastics such as mixtures with polyethylene or polypropylene.

The poor compatibility of polyethylene and polypropylene with other materials is a drawback. So far, costly and time-consuming surface preparation was the only solution. According to a press stement, the additive technology developed by Interface Polymers makes such preparation unnecessary. Moreover, it greatly reduces the amount of additives needed. As a result, mixed plastics are easier to recycle.

Using the technology in paints and coatings

Bernhard Mohr, head of Venture Capital at Evonik: “Many modern applications would be unthinkable without plastics, but recycling them is still a big challenge. Interface Polymers’ additive technology offers a solution and is an excellent fit with Evonik’s Circular Plastics Program.” The Sustainability Tech Fund launched by Evonik in 2022 is adding Interface Polymers to its investment portfolio. In addition to the investment by the Sustainability Tech Fund, Evonik’s Coating Additives business line has agreed an extensive development partnership with Interface Polymers with the aim of using its technology in paints and coatings.