These can be as modest as the particles of zinc oxide in sunscreens, but they can also be reinforcing fibers in new composites or carbon nanotube wires in ultra-miniaturized electronics.

• 这类产品往往并不特别引人注目（例如在隔热纸中加入氧化锌），但有些则像新型复合材料中的强化纤维，或是超微型电子装置中的奈米碳管导线等。