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Fig. 5 Superhydrophobic performance of micro-scale carbon nanotube pillars of 250 μm in width
and 100 μm in height. a A10μL water droplet sitting on the surface of vertically aligned carbon nanotubes. b Top view of water droplet sitting on the micro-scale carbon nanotube pillars. c Schematic
diagram showing carbon nanotube pillars held at base by polymer adhesive and a water droplet sitting on top of pillars [28]. Reprinted/adapted from Ref. [28], Copyright (2019) American Chemical
Society
6 Self-cleaning Effect Using Silver Nanoparticles
Silver (Ag) nanoparticles are loaded onto textile surface for multipurpose applications. Silver is an excellent antimicrobial agent. Being having higher specific area
its nanoparticles is a highly active material. Coating textile materials with silver
nanoparticles brings about self-cleaning effect. The silver particles destroy various
organic compounds such as dirt, contaminants as well as micro-organisms resulting
minimal washing of cloths. The Ag nanoparticles exhibit water repellency effect by
creating nano-whiskers over textile surface which are made of hydrocarbons and
have about 1/1000th of the size of a typical cotton fiber. The Ag nanoparticles create
a fuzz effect on the textile fibre surface without deteriorating the tensile properties
of the fibre as shown in Fig. 6. Ag nanoparticles are also used in conjunction with
TiO 2 particles to coat over textile surface either in colloidal form or in particular
(a) Untreated textile surface
(b) Treated textile surface
Fig. 6 Silver nano-particles used for self-cleaning textile
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