XPS spectra. The spectra correspond to (a) Cd 3d, (b) O 1 s, and (c) S 2p for the CdS nanocrystals with various amounts of injected H2O2 solution. The dashed lines on each spectrum are from  and .
Lee et al. Nanoscale Research Letters 2012 7:672 doi:10.1186/1556-276X-7-672