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Nanofabrics are textiles engineered with small particles that give ordinary materials advantageous properties such as superhydrophobicity (extreme water resistance, also see "Lotus effect"), [1] odor and moisture elimination, [2] increased elasticity and strength, [3] and bacterial resistance. [4]
The template synthesis method uses a nanoporous membrane template composed of cylindrical pores of uniform diameter to make fibrils (solid nanofiber) and tubules (hollow nanofiber). [51] [52] This method can be used to prepare fibrils and tubules of many types of materials, including metals, semiconductors and electronically conductive polymers.
A nanofiber has two external dimensions in the nanoscale, with nanotubes being hollow nanofibers and nanorods being solid nanofibers. A nanoplate/nanosheet has one external dimension in the nanoscale, [ 20 ] and if the two larger dimensions are significantly different it is called a nanoribbon .
The use of nanofiber webs as a filtering medium is well established. Due to the small size of the fibers London-Van Der Waals forces are an important method of adhesion between the fibers and the captured materials. Polymeric nanofibers have been used in air filtration applications for more than seven decades.
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The nanofiber diameter depends on the catalyst size. The CVD process for the fabrication of VGCF generally falls into two categories: [5] 1) fixed-catalyst process (batch), and 2) floating-catalyst process (continuous).