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Spontaneous schooling behavior in photochemically excited nanoparticles

Spontaneous schooling behavior in photochemically excited nanoparticles. Michael Ibele, Ayusman Sen, Tom Mallouk, Paul Lammert, Vincent Crespi, Penn State MRSEC DMR-0820404.

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Spontaneous schooling behavior in photochemically excited nanoparticles

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  1. Spontaneous schooling behavior in photochemically excited nanoparticles Michael Ibele, Ayusman Sen, Tom Mallouk, Paul Lammert, Vincent Crespi, Penn State MRSEC DMR-0820404 Dark ~1μm silver chloride (AgCl) nanoparticles spontaneously expel Cl- ions in response to UV illumination. The differing rates at which positive and negative ions diffuse away from the particles create local electric fields, thereby triggering a collective behavior wherein silica tracer particles seek out and surround the AgCl particles, analogous to how cells in the immune system seek out intruders. This behavior could form the basis for complex, reactive behaviors in collective nanoparticle systems.

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