Platonic Gold Nanocrystals: Formation of Icosahedron and Decahedron Nanostructures Through Twining Mechanism

Nyembe, Sanele; Mpelane, Siyasanga; Shumbula, Poslet; Harris, Richard Anthony; Moloto, Nosipho; Sikhwivhilu, Lucky

doi:10.1166/jnn.2016.12372

Cited by 2 publications

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“…A monomodal peak of the samples implies that the nanoparticles were monodispered. The wavelength position of the UV-Vis was a typical surface plasmon resonance (SPR) band of gold nanostructures in solution [ 25 ]. There was a red-shift when the citrate concentration decreased which suggests an increase in the particle size from 0.7 to 0.2 ratio as confirmed by UV-Vis in Figure 3 .…”

Section: Resultsmentioning

confidence: 99%

Enhanced Solar Efficiency via Incorporation of Plasmonic Gold Nanostructures in a Titanium Oxide/Eosin Y Dye-Sensitized Solar Cell

et al. 2022

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Plasmonic gold nanoparticles significantly improved the efficiency of a TiO2 and Eosin Y based dye-sensitized solar cell from 2.4 to 6.43%. The gold nanoparticles’ sizes that were tested were 14 nm, 30 nm and 40 nm synthesized via the systematic reduction of citrate concentration using the Turkevich method. Prestine TiO2 without plasmonic gold nanoparticles yielded an efficiency of 2.4%. However, the loading of 40 nm gold nanoparticles into the TiO2 matrix yielded the highest DSSC efficiency of 6.43% compared to 30 nm (5.91%) and 14 nm (2.6%). The relatively high efficiency demonstrated by plasmonic gold nanoparticles is ascribed to light absorption/scattering, hot electron injection and plasmon-induced resonance energy transfer (PIRET), influenced by the size of the gold nanoparticles.

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Section: Resultsmentioning

confidence: 99%