January 15, 2021 Using advanced analytical scanning transmission electron microscopy (STEM) at a magnification of 10 million times, University of Minnesota researchers were able to isolate and image the structure and composition of the metallic line defect in a perovskite crystal BaSnO3. This image shows the atomic arrangement of both the BaSnO3 crystal (on the left) and the metallic line defect.
In groundbreaking materials research, a team led by University of Minnesota Professor K. Andre Mkhoyan has made a discovery that blends the best of two sought-after qualities for touchscreens and smart windows transparency and conductivity.
The researchers are the first to observe metallic lines in a perovskite crystal. Perovskites abound in the Earth’s center, and barium stannate (BaSnO3) is one such crystal. However, it has not been studied extensively for metallic properties because of the prevalence of more conductive materials on the planet like metals or semiconductors
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IMAGE: While studying a thin-film material called strontium stannate (SrSnO3), University of Minnesota researchers noticed the surprising formation of checkerboard patterns at the nano scale similar to structures fabricated in costly,. view more
Credit: Credit: Jalan Group, University of Minnesota
A team led by University of Minnesota Twin Cities researchers has discovered a groundbreaking one-step process for creating materials with unique properties, called metamaterials. Their results show the realistic possibility of designing similar self-assembled structures with the potential of creating built-to-order nanostructures for wide application in electronics and optical devices.
The research was published and featured on the cover of
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Complex oxide thin films are finding applications in a wide range of energy and information technologies, including electron and ion conductors, photovoltaics, thermoelectrics, dielectrics, and resistive switching. Irrespective of whether single thin films or more sophisticated multilayered systems are employed, each of these technologies requires a thorough knowledge of the oxide physicochemical properties, its interactions with the environment and the role of defect/interface/boundary effects that might stem between film and substrate, layers with different compositions or even simply from the grain boundaries. Whilst depending on the technology area the key properties might be different, many of the materials optimization strategies may be common. Therefore, we believe that the discussion between diverse and even complementary researchers’ communities can be extremely beneficial for a better understanding of the crucial aspects that need to