Wisconsin MRSEC researchers have used 3D-printing to make a new waveguide for microwaves. These waveguides are formed from a topological photonic crystal, which makes them more resistant to defects. As a result, a straight waveguide and a waveguide with multiple bends have the same ability to transmit radiation.
The Wisconsin MRSEC partnered with the Colorado Migrant Education Program to provide MRSEC-developed research-inspired activities to a new underserved and underrepresented audience during the 2023 summer Migrant Education STEAM Academy.
Complex oxide materials have useful electronic, magnetic, and optical properties arising from their versatile composition and crystallographic structure. Wisconsin MRSEC researchers have investigated new methods for the crystallization of complex oxides. They have found that the crystallization of amorphous complex oxide layers from isolated seed crystals presents the opportunity to remove geometric constraints posed by previous thin film epitaxial growth methods on single-crystal substrates.
MRSEC researchers have found similar phenomena in systems as diverse as amorphous water (the glassy form of ice) and chalcogenides. These various materials have applications spanning electronics, catalysis, and medicine, so the discovery of common features in their crystallization has potential impact far beyond the IRG’s original work in metal oxides.
Wisconsin MRSEC scientists created an interactive experience to engage high school students participating in the UW-Madison PEOPLE pre-college program with materials research. PEOPLE provides longitudinal support to first-generation college students from historically marginalized and underrepresented groups. Attendees had expressed interest in STEM fields, but for most, this was their first interaction with materials science.
Wisconsin MRSEC researchers have discovered a new common behavior for glasses: How fast atoms move on a glass surface is connected to how easily flow is activated for the same material as a liquid. This connection holds across all kinds of glasses and over many orders of magnitude in the speed of motion.
The Wisconsin MRSEC Advanced Materials Industrial Consortium (AMIC) has organized a series of lunch-time seminars by engineers from member companies and prospective member companies. These seminars introduce students, faculty, and staff to the engineering challenges and career opportunities of the industrial partners.
Wisconsin MRSEC researchers have developed a new way to synthesize one possible substrate, ScAlMgO4, by depositing it at low temperature, then crystallizing it. Now, the team has developed the ability to grow high-In InGaN on top of ScAlMgO4 using the industry-standard metal-organic chemical vapor deposition process. The films are smoother than films grown on free-standing ScAlMgO4 substrates, which is a critical prerequisite to devices including LEDs, other optoelectronics, and highspeed electronics. The team has developed an InGaN-based green LED device on a conventional substrate that will yield yellow to red light when grown at higher In content on ScAlMgO4.
Molecules near to the surface of a glass move much faster than molecules on the inside – up to a billion times faster. Making glasses often involves adding new molecules from the surface, so high surface mobility is crucial for making materials for cell phone displays, organic solar cells, and drug delivery.
Coatings that prevent fouling are critical in commercial, industrial, and healthcare contexts. Wisconsin MRSEC researchers have developed new spray-based methods to make nanoporous water-repelling films and spray-on ‘slippery liquid-infused porous surfaces’ (SLIPS). These coatings are antifouling to a range of substances and microorganisms and can be produced using scalable, manufacturing-compatible methods. They also developed new antifouling ‘slippery nanoemulsion-infused porous’ (SNIPS) that use water-in-oil nanoemulsions to slowly release encapsulated cargo.