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Há 22 horas · This imparts controllable wetting and good interfacial properties. When the substrate is heated to the growth temperature (~600 to 850 °C), the continuous iron film breaks up into small islands with each island then nucleating a carbon nanotube. The sputtered thickness controls the island size and this in turn determines the nanotube diameter.
Há 22 horas · Ailuropodinae ( Pandas) Tremarctinae (Short-faced bears) Ursinae (All other bear species) Bears are carnivoran mammals of the family Ursidae ( / ˈɜːrsɪdiː, - daɪ / ). They are classified as caniforms, or doglike carnivorans. Although only eight species of bears are extant, they are widespread, appearing in a wide variety of habitats ...
