Colloidal plasmonic structures for harvesting solar radiation

Modeling and analysis of optical properties of nanoparticles and nanofluids for effective absorption of solar radiation and their heating

“…Optical nanostructures can control the optical absorption and are therefore being investigated for solar thermal applications with design of optical nanostructures [104]. The photothermal conversion efficiency of CuO/ Ag plasmonic NF is higher than that of CuO NF under the same conditions and is proportional to NPs concentration [105]. The photothermal conversion performance of six commonly used materials (Ag, Fe, Zn, Cu, Si, Al 2 O 3 ) in direct absorption solar collectors was experimentally investigated under a focused simulated solar flux of 12 Suns [106].…”

“…The results of heating of homogeneous metallic and core-shell systems NPs and fluid [92][93][94][95][96][97][98][99][100][101][102][103][104][105][106][107][108][109][110][111] have been reviewed in this part. In general, next set of parameters determines the effective absorption and heating of NPs and fluid (NFs)-q abs , r 0 (r 1 ), N 0 , cρ, c m ρ m , k m , P 1 [see (10)(11)(12)].…”

Improving the Performance of Direct Solar Collectors and Stills by Controlling the Morphology and Size of Plasmonic Core–Shell Nanoheaters

“…Since a large and fine-tuning of the LSP band due to the NP size is not usually obtained within the limit where the scattering is negligible, , a fairly efficient strategy to tune the LSP band in different spectral regions is by manipulation the NP morphology . For instance, anisotropic plasmonic NPs, such as nanoellipsoids, nanorods, and nanoprisms, are very attractive as nanofluids in DASC, because they support the presence of multiple LSP bands, harvesting solar radiation in different spectral regions simultaneously. − Nevertheless, the most efficient match between the nanofluid absorption spectra and the solar radiation emission was reported when the morphology of the plasmonic NPs presents core–shell or multishell structures. − Previous studies have shown that the coupling effects between light and the core–shell interface can be utilized efficiently to tune the radiative properties of plasmonic nanofluids used in photothermal applications . For example, it was numerically predicted that thin DASC can achieve efficiencies of 85% and 90% when their working fluids contain silica–gold core–shell NPs and spherical gold/silica/gold multilayers, with a volume fraction of 10 –5 , respectively .…”

“…For instance, anisotropic plasmonic NPs, such as nanoellipsoids, nanorods, and nanoprisms, are very attractive as nanofluids in DASC, because they support the presence of multiple LSP bands, harvesting solar radiation in different spectral regions simultaneously. − Nevertheless, the most efficient match between the nanofluid absorption spectra and the solar radiation emission was reported when the morphology of the plasmonic NPs presents core–shell or multishell structures. − Previous studies have shown that the coupling effects between light and the core–shell interface can be utilized efficiently to tune the radiative properties of plasmonic nanofluids used in photothermal applications . For example, it was numerically predicted that thin DASC can achieve efficiencies of 85% and 90% when their working fluids contain silica–gold core–shell NPs and spherical gold/silica/gold multilayers, with a volume fraction of 10 –5 , respectively . Although the strong influence of NP morphology on the efficiency of DASC based on plasmonic nanofluids has been numerically predicted, , few experimental studies in DASC , and no experimental studies in direct SSs have quantified the plasmonic NP’s size and shape influence so far …”

“…For example, it was numerically predicted that thin DASC can achieve efficiencies of 85% and 90% when their working fluids contain silica–gold core–shell NPs and spherical gold/silica/gold multilayers, with a volume fraction of 10 –5 , respectively . Although the strong influence of NP morphology on the efficiency of DASC based on plasmonic nanofluids has been numerically predicted, , few experimental studies in DASC , and no experimental studies in direct SSs have quantified the plasmonic NP’s size and shape influence so far …”