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nanoparticles in water

Twinkle Twinkle

Silver nanoparticles with a special coating to enable visualization float in a sample of water like so many stars in the night sky. The safety of these particles in a natural system is being tested in experimental chambers operated in the Duke Forest by the Center for Environmental Implications of Nanotechnology (CEINT), which recently won a $15 million renewal grant from the National Science Foundation. Slight variations in diameter cause the particles to reflect a hyperspectral light source in different colors. On average, the particles are just 55-nanometers in diameter. Credit: Appala Raju Badireddy