Low-resolution and HRTEM images of samples 1 and 6. The low-resolution (a) and HRTEM images (b) of sample 1. The inset in (a) is the SAED pattern of the nanocrystals. The low-resolution (c) and HRTEM images (d) of sample 6. The inset is the FFT pattern of HRTEM in (d). The EDS spectrum (e) from sample 6.