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Adjustment of the Optical Properties of Dispersion Derived Carbon Nanotube Coatings
Author(s) -
Weisenseel Bastian,
Zierath Bodo,
Fey Tobias,
Greil Peter
Publication year - 2016
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201500343
Subject(s) - materials science , carbon nanotube , dispersion (optics) , nanotechnology , nanotube , carbon fibers , composite material , optics , composite number , physics
Porous carbon nanotube coatings for potential solar thermal receiver applications were generated on silicon carbide via an infiltration process from an aqueous dispersion. A screening evaluation was applied to generate carbon nanotube coatings with enhanced absorption, i.e., reduced reflection of solar wavelength spectra from 2 500–500 nm. Structures with low density nanotube packing with a total reflectance <2% were fabricated from a low concentration dispersion of sterically stabilized (PVP) carbon nanotubes. Though the optical performance is lower when compared to carbon nanotube coatings generated by CVD, the filtration method offers control of the nanotube pore structure over a wide range, a greater flexibility with regards to substrate geometry and excellent up‐scaling capability.