Highlights

Researchers at Wisconsin MRSEC have created a new technique using an electron microscope to observe how molecules in organic semiconductors align when heated. They found that even slight temperature increases led to better molecular arrangement, with larger, straighter sections forming. This improvement occurs as heat allows molecules to shift into more organized positions. The team's work may lead to better control over molecule movement, paving the way for advances in organic and inorganic materials for various technologies.

Researchers from Wisconsin MRSEC have shown that stretching a two-dimensional material called CrSBr significantly changes its magnetoelastic properties, which link magnetism and physical strain. They created a tiny mechanical device to measure this effect and found that the magnetoelastic coupling could be increased by 50% through stretching. These findings open up new possibilities for highly sensitive magnetic sensors and more efficient electronics that could adjust based on strain.

Researchers have reported the discovery of superconductivity in a twisted bilayer of WSe2, a type of transition metal dichalcogenide. This phenomenon, previously observed in twisted graphene, raises questions about whether superconductivity in flat-band systems is specific to graphene or a more universal trait. The study suggests that unique properties of WSe2, such as its band gap and magnetism, could lead to new opportunities for exploring superconductivity in different materials beyond graphene.

A recent paper published in *Science* highlights the advancements made by the IRG2 team in energy transport using superatomic materials. They developed new materials like Re₆Se₈Cl₂ that allow for faster transport than traditional silicon. Their research includes creating rod-shaped photodetectors that can effectively move "acoustic polarons" over long distances without losing energy. These findings pave the way for new, faster types of transistors that could significantly improve charge transport in electronic devices.

A recent study explored the design of coiled coils made up of amino acids, finding that a minimum of three heptads (21 amino acids) is essential for stable formation. A specific 22-residue sequence, BNDL22, showed promising stability and melting temperature for creating nanostructured materials. Incorporating BNDL22 in hydrogels allowed for innovative properties like thermoresponsiveness, making it useful for 3D printing and injections. This research lays the groundwork for developing advanced materials and molecular machines.

A recent study introduces new ways to analyze ultrafast-light-driven magnetic structures that show simultaneous demagnetization and emit THz radiation. Historically, little work has been done to calculate THz emissions from these systems. The researchers developed two new methods that combine advanced theories to predict a new phenomenon of charge current pumping due to ultrafast demagnetization. This research enhances our understanding of the interactions within these materials, opening up potential for future applications in spintronics and terahertz technologies.

FORGES is a summer program aimed at high school students interested in STEM careers. In partnership with the University of Delaware, the program offers hands-on experiences in materials science, chemistry, biology, and physics. Activities included identifying polymers, measuring material properties, and performing gene editing techniques. After the program, 87% of students felt more confident about attending college, and all participants were more inclined to pursue STEM careers and felt better prepared for laboratory work.

Researchers developed new design techniques for creating complex two-dimensional patterns using triangular units that fit together based on specific chemical interactions. By leveraging symmetry, they designed crystal structures with many different subunit types, which could help advance technologies in light manipulation. Experiments with DNA origami confirmed the effectiveness of these designs, producing patterns with sizes comparable to visible light. The study also identified cost-effective design principles to streamline future work in this area.

Researchers combined experiments and computer simulations to uncover why contractile asters, made of biopolymers, slow down in coalescence and can have liquid or solid traits. They identified the reasons for asters becoming solid and created new ways to form liquid-like asters. Additionally, other studies looked at how actin filaments affect the movements of these asters. This work helps fill in knowledge gaps about the behavior of these structures in living systems.

Researchers at UMN MRSEC have explored the self-assembly of ABC bottlebrush block terpolymers, which could lead to new material designs. Unlike traditional diblock bottlebrushes, these new structures showed interesting formations like core-shell cylinders and an unusual rectangular pattern. They found that by changing the molecular weight, they could achieve a variety of sizes. This work opens up exciting possibilities for creating materials with unique structures and sizes for uses in photonic crystals and metamaterials.