Spectrally selective coatings

Xu, X., Gibbons, T. and Cortie, M.B. (2006) Spectrally-selective gold nanorod coatings for window glass. Gold Bulletin, 39, 156-165. 

High enhancement of the copper localized surface plasmon absorbency was recorded at the two-layer planar system consisted of copper and silver nanoparticles prepared with successive vacuum evaporation. The result obtained may be caused by strong near-field coupling in the close-packed binary system. The effect may be used for the development of high-absorptive coatings and spectral selective nanoelements in the visible and near infrared spectral ranges. 

Besides spectrally selective coatings also angular coatings and electrochromics based coatings are proposed for this purpose [75]. 

Spectrally Selective Coatings - A type of window glazing films used to block the infrared (heat) portion of the solar spectrum but admit a higher portion of visible light. 

Haitjema H (1989) Spectrally selective tinoxide and indiumoxide coatings. Ph.D. Thesis. TU Delft, Delft, The Netherlands... 

Figure 11 -Transmittance and Reflectance Spectra for one type of spectrally-selective glass — a so-called high-transmission, low-emissivity silver-based coated glass...

There is some evidence that composites based on ZrB including ZrB -SiC and ZrB -MoSi, which have a superior oxidation resistance up to 1600°C, also possess a pronounced degree of intrinsic spectral selectivity (Bogaerts Lampert, 1983 Kennedy, 2002) which could be useful for solar absorbers. However, studies of spectral emissivity characteristics of UHTCs refer to films and coatings and not to bulk materials (either porous or dense). 

Currently, commercial exploitation of precious metals as spectrally selective coatings manifests in the form of continuous thin films. These films are used for their high reflectance of NIR and IR... 

Laminates or polymer coatings containing dispersed rods or nanoshells could provide a cheap and effective solution for application of spectrally selective coatings of nanoparticles to existing structures. A novel implementation of this is to impart NIR/IR extinction properties of nanoshells to protective eyewear or contact lenses [93]. 

The applications of the nanoparticles and structures that we have surveyed here have extended from various kinds of sensors and analytical devices, through spectrally selective coatings and sinter inks to medical diagnostics and therapeutics. Nanoscale gold must surely be one of the most versatile and valuable materials systems available ... 

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