Oxygen sensing, magnetic, and upconversion luminescence properties are combined in multi-functional composite particles prepared herein by a simple mixing, baking, and grinding procedure. Upconverting ...

A vibrant aurora display revealing how ionized particles from the sun excite oxygen and nitrogen in different atmosphere layers, creating iconic green and red aurora colors. Auroras, known for their ...

Representative light microscopy images of carbonaceous (black) particles adherent to red blood cells (red arrows) from healthy volunteers. Each image is from a different adult volunteer. Researchers ...