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Two smiling people in blue lab coats and safety glasses. The person on the right has their arm raised in the center of the frame presenting a nickel-sized sample. A woman, left, and a man look at visual data on several monitors with components of an electron microscope nearby. Polly Arnold, Division Director, Chemical Sciences Division, with Matt Hernandez, Graduate Student Researcher. Magnon propagation in an antiferromagnet is revealed in these snapshots of spatially resolved transient reflectance, obtained using pairs of laser pulses. Sayeef Salahuddin (left) and Nirmaan Shanker in the lab. Two black and white profile pictures of a female scientist and a male scientist on a green gradient background Carolin Sutter-Fella (standing), Staff Scientist, and Tim Kodalle, Postdoctoral Researcher, discuss their research at the Advanced Light Source (ALS). A field of pink, purple, cyan, indigo, orange, and yellow shapes packed together, resembling vibrant abstract art. Illustration of a robot arm, vials, a laptop, and a beaker on a desk facing the window. Split shot, over under water surface. Defocused fish under the waterline with an island on the surface during a dramatic sunrise. A cartoon-style graphic of a woman in green holding a plastic cup looking at a range of different gray recycling bins with piles of multicolored waste piled around them. Transmission electron microscope (TEM) images of the new 2D nanosheet as a barrier coating that self-assembles on a variety of substrates: a Teflon beaker and membrane, polyester film, thick and thin silicon films, and glass.