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(a) TEM image of Au nanoparticles in as-deposited nanocomposite sample. (b) TEM image of Au–Si core-shell nanoparticles in nanocomposite sample annealed at .
XPS spectra showing (a) Au and (b) Si peaks of as-deposited and annealed nanocomposite films deposited on Si.
(a) Optical absorption spectra of as-deposited and annealed nanocomposite films deposited on silica glass. (b) Variation of LSPR wavelength of Au–Si core-shell nanoparticles with volume fraction of Si nanoshells, as estimated from theoretical calculations.
Schematic diagram showing mechanism of Au–Si core-shell formation in annealed nanocomposite.
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