258581.fig.001
Figure 1: XPS spectra of the 2p core-level of sulfur in (a) ammonium diethyldithiocarbamate (ADEDTC) powder, (b) ADEDTC-treated surface (20 min), (c) ADEDTC-treated surface (40 min), and (d) ADEDTC-treated surface (60 min).