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Chemistry

‘Hopelessly Attached’: Scientists Discover New 2D Material That Sticks the Landing

Researchers have discovered a new 2D material, confirming decade-old prediction.

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The discovery of a new 2D material has sent shockwaves through the scientific community. For over a decade, researchers at Rice University had predicted that boron atoms would cling too tightly to copper to form borophene, a flexible, metallic two-dimensional material with potential applications in electronics, energy, and catalysis. However, a recent study published in Science Advances reveals that this prediction has come true, but not in the way anyone expected.

Unlike previous attempts to synthesize borophene on metals like silver and gold, researchers have now successfully created a defined 2D copper boride material with a distinct atomic structure. This breakthrough sets the stage for further exploration of a relatively untapped class of 2D materials.

“Borophene is still a material at the brink of existence,” said Boris Yakobson, Rice’s Karl F. Hasselmann Professor of Engineering and professor of materials science and nanoengineering and chemistry. “Our very first theoretical analysis warned that on copper, boron would bond too strongly. Now, more than a decade later, it turns out we were right – and the result is not borophene, but something else entirely.”

The researchers’ efforts combined high-resolution imaging, spectroscopy, and theoretical modeling to resolve a debate about the nature of the material that forms at the interface between the copper substrate and the near-vacuum environment of the growth chamber.

A strong match between experimental data and theoretical simulations helped reveal a periodic zigzag superstructure and distinct electronic signatures. These findings have expanded our knowledge on the formation of atomically thin metal boride materials, which could inform future studies of related compounds with known technological relevance.

“2D copper boride is likely to be just one of many 2D metal borides that can be experimentally realized,” said Mark Hersam, Walter P. Murphy Professor of Materials Science and Engineering at Northwestern University, who co-authored the study. “We look forward to exploring this new family of 2D materials with broad potential use in applications ranging from electrochemical energy storage to quantum information technology.”

This discovery comes shortly after another boron-related breakthrough by the same Rice theory team. The juxtaposition of these findings highlights both the promise and the challenge of working with boron at the atomic scale, whose versatility allows for surprising structures but also makes it difficult to control.

The research was supported by the Office of Naval Research (N00014-21-1-2679), the National Science Foundation (DMR-2308691) and the United States Department of Energy (2801SC0012547). The content herein is solely the responsibility of the authors and does not necessarily represent the official views of the funding organizations and institutions.

Chemistry

A Groundbreaking Discovery: Designer Hybrid 2D Materials for Next-Generation Technologies

Materials scientists have succeeded in creating a genuine 2D hybrid material called glaphene.

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The field of materials science has taken a significant leap forward with the creation of designer hybrid 2D materials. A team of researchers from Rice University has successfully synthesized glaphene, a genuine 2D hybrid material by chemically integrating graphene and silica glass into a single compound. This breakthrough discovery opens up new avenues for developing custom-built materials for next-generation electronics, photonics, and quantum devices.

The team employed a two-step, single-reaction method to grow glaphene using a liquid chemical precursor containing both silicon and carbon. By adjusting oxygen levels during heating, they first grew graphene and then shifted conditions to favor the formation of a silica layer. This novel approach allowed them to create a true hybrid material with new electronic and structural properties.

One of the key findings was that the layers in glaphene do not simply rest on each other; instead, electrons move and form new interactions and vibration states, giving rise to properties neither material has on its own. This unique bonding between the graphene and silica layers changes the material’s structure and behavior, turning a metal and an insulator into a new type of semiconductor.

The researchers used various techniques, including Raman spectroscopy and quantum simulations, to verify the experimental results and gain insights into the atomic-level interactions within glaphene. The findings suggest that this hybrid bonding allows electrons to flow between the layers, creating entirely new behaviors.

This research has significant implications for the development of next-generation materials with tailored properties. By combining fundamentally different 2D materials, researchers can create custom-built materials from scratch, enabling breakthroughs in various fields such as electronics, photonics, and quantum computing.

The team’s work reflects a guiding principle that encourages exploring ideas that others may hesitate to mix. This research demonstrates the power of collaboration and interdisciplinary approaches in driving innovation forward. The findings have been supported by various funding organizations and institutions, highlighting the importance of public-private partnerships in advancing scientific knowledge.

In conclusion, the discovery of glaphene represents a major breakthrough in materials science, offering new possibilities for creating designer hybrid 2D materials with tailored properties. This research has significant implications for various fields, from electronics to quantum computing, and underscores the importance of collaboration and interdisciplinary approaches in driving innovation forward.

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Air Quality

“Visualizing the Rotten Egg: Scientists Use Cryo-EM to Reveal the 3D Structure of Sulfite Reductase”

Most people have witnessed — or rather smelled — when a protein enzyme called sulfite reductase works its magic. This enzyme catalyzes the chemical reduction of sulfite to hydrogen sulfide. Hydrogen sulfide is the rotten egg smell that can occur when organic matter decays and is frequently associated with sewage treatment facilities and landfills. But scientists have not been able to capture a visual image of the enzyme’s structure until now, thus limiting their full understanding of how it works.

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The ability to visualize complex chemical reactions has long been a holy grail for scientists. For one particularly pungent protein enzyme called sulfite reductase, this dream has finally become a reality, thanks to the work of Florida State University Professor Elizabeth Stroupe and her former doctoral student Behrouz Ghazi Esfahani.

Sulfite reductase is an enzyme that catalyzes the reduction of sulfite to hydrogen sulfide, which is infamous for its “rotten egg” smell. This reaction occurs in various natural environments, from fruit and vegetable decomposition to sewage treatment facilities and landfills. However, despite its importance, scientists had been unable to capture a clear visual image of the enzyme’s structure – until now.

Using an advanced technique called cryo-electron microscopy (cryo-EM), Stroupe and Ghazi Esfahani were able to visualize the 3D structure of sulfite reductase in unprecedented detail. Cryo-EM allows scientists to capture images of chemical reactions as they occur, providing the necessary data to reconstruct the complex molecular structures.

The resulting image is a striking representation of the protein’s intricate arrangement of atoms and electron transfer mechanisms. Stroupe describes it as an “octopus with four yo-yos” due to its flexibility and dynamic nature.

This breakthrough has significant implications for scientists, particularly in understanding how to control or manipulate chemical reactions – a process crucial for drug manufacturers and industry. As Ghazi Esfahani notes, the research also has environmental implications, such as understanding how bacteria use sulfur as an energy source.

While this achievement marks a major step forward in understanding sulfite reductase, there are still unanswered questions about its function as part of larger protein assemblies and how similar enzymes work in other organisms – like the pathogen that causes tuberculosis. Stroupe’s lab is continuing to explore these mysteries, shedding more light on the intricate chemistry of sulfur metabolism.

In conclusion, the ability to visualize complex chemical reactions has finally been achieved for sulfite reductase, thanks to the innovative use of cryo-EM by Stroupe and Ghazi Esfahani. This breakthrough opens doors to new understanding and manipulation of chemical reactions – with far-reaching implications for science, industry, and the environment.

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Chemistry

“Cleaning Water with Iron: A Breakthrough in Removing Forever Chemicals”

Researchers find that iron powder, an inexpensive alternative to activated carbon, does a better job at filtering PFOS from water — it’s 26 times more effective.

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The article you provided highlights a crucial breakthrough in removing forever chemicals from water. Forever chemicals, also known as PFOS, are synthetic compounds used in various commercial applications but have been linked to numerous health issues.

Researchers Xiaoguang Meng and Christos Christodoulatos, along with Ph.D. student Meng Ji, were determined to identify the most efficient method for removing these toxins from the water. They explored two common methods: activated carbon and microscale zero-valent iron (mZVI), also known as iron powder.

Activated carbon is widely used in water filtration systems to remove forever chemicals through a process called adsorption. However, researchers found that mZVI was a more effective water purifier. According to Ji, “the iron powder was 26 times more effective than activated carbon per unit surface area.” This significant finding suggests that using mZVI could be a cost-effective and efficient method for removing forever chemicals from contaminated water.

Moreover, the researchers discovered an unexpected property of rusted iron particles: they still retained their adsorption properties. The surface of the iron oxide-covered particles remained active, allowing them to contribute to PFOS removal. This phenomenon has generated significant interest among other researchers and highlights the potential for further investigation into developing large-scale removal technologies.

The implications of this research are substantial, particularly in addressing the widespread presence of forever chemicals in soil, agricultural products, and drinking water sources. By developing more effective methods for removing these toxins, we can significantly reduce health risks associated with exposure to PFOS.

As Meng notes, “we need to do more research to find out why” mZVI’s adsorption properties are retained even after rusting. Further investigation into this phenomenon will be crucial in refining and scaling up removal technologies. The potential for breakthroughs in water purification and the removal of forever chemicals is exciting and warrants continued exploration and investment in research.

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