IPFS News Link • Energy
Next Solar Cells Could Rely on Nanoflower Power
• http://www.technewsdaily.com, Charles Q. ChoiTo create the flowerlike structures, scientists first heat germanium sulfide powder in a furnace until it starts to vaporize. This gas is then blown into a cooler area, where it solidifies as a crystalline sheet only about 30 nanometers (billionths of a meter) wide – about 15 times thicker than a molecule of DNA.
As the researchers grow these layers of germanium sulfide in stacks atop each other, they branch out from one another. The result is a pattern of crystalline petals similar to a carnation's or marigold's – flowerlike structures about 100 microns in diameter, or the width of a human hair.