Alloyed Crystalline CdSe(1‐x)S(x) Semiconductive Nanomaterials – A Solid State (113)Cd NMR Study

Solid‐state NMR analysis on wurtzite alloyed CdSe(1−x)S(x) crystalline nanoparticles and nanobelts provides evidence that the (113)Cd NMR chemical shift is not affected by the varying sizes of nanoparticles, but is sensitive to the S/Se anion molar ratios. A linear correlation is observed between (113)Cd NMR chemical shifts and the sulfur component for the alloyed CdSe(1−x)S(x) (0<x<1) system both in nanoparticles and nanobelts (δ(Cd)=169.71⋅X(S)+529.21). Based on this correlation, a rapid and applied approach has been developed to determine the composition of the alloyed nanoscalar materials utilizing (113)Cd NMR spectroscopy. The observed results from this system confirm that one can use (113)Cd NMR spectroscopy not only to determine the composition but also the phase separation of nanomaterial semiconductors without destruction of the sample structures. In addition, some observed correlations are discussed in detail.