The identity of ZnSe and CdSe particles was confirmed by indexing SAED patterns to JCPDS cards obtained from the International Centre for Diffraction Data (ICDD) database. We assign the ZnSe reaction product as a zinc blende type ZnSe nanocrystal, through comparison of the indexed diffraction data to JCPDS card number 00-005-0522 (Figure , Table ). The d-spacings of the (111), ( ), (311), and (331) lattice planes were matched to different Friedel pairs in the SAED image. Likewise, diffraction data was collected from CdSe particles and indexed to JCPDS card number 04-011-9599. Friedel pairs were measured and corresponded to the (100), ( ), ( ), ( ), (103), and (112) lattice planes (Figure , Table ).