Oh, my stars and hexagons! DNA code shapes gold nanoparticles

DNA holds the genetic code for all sorts of biological molecules and traits. But researchers have found that DNA's code can similarly shape metallic structures. The team found that DNA segments can direct the shape of gold nanoparticles -- tiny gold crystals that have many applications in medicine, electronics and catalysis. Each of the four DNA bases codes for a different gold particle shape: rough round particles, stars, flat round discs, and hexagons.

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