Fig. 4 | Nature Communications

Fig. 4

From: Retarding oxidation of copper nanoparticles without electrical isolation and the size dependence of work function

Fig. 4

UV-vis stability studies of thiol treated CuNPs. a, b and respective absorbance spectra of 1 and 9 over a period of 16 h in air. The films are sub-monolayers of NPs tethered on glass. A dramatic fall in the shift of maximum wavelength (Δλ max) is observed with thiol treatment. Plot c LSPR λ max vs time, for samples 1 and 8 shows the stability of MPA-capped CuNPs in air. d Shift in A/A 0 and LSPR λ max from 0 to 16 h of air exposure for various ligand-treated CuNP sub-monolayers

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