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UV-visible absorption spectra of Au NPs synthesized with different concentration of L-cysteine.
FL spectra of Au NPs at different L-cysteine concentration.
TEM image of Au NP synthesized without any capping agent.
TEM image of 2.0 mM L-cysteine capped Au NPs.
FTIR spectra of (a) L-cysteine and (b) L-cysteine capped Au NPs.
Absorption peak position, FWHM of absorption peaks and particle size with size distributions at different L-cysteine concentration.
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