Figure 1
From: Strong enhancement of phonon scattering through nanoscale grains in lead sulfide thermoelectrics
(a) XRD spectrum of the PbS nanoparticles produced. As a reference, the pattern corresponding to the cubic rock-salt PbS phase (PDF#78–1055) is also shown. (b) TEM image of PbS nanoparticles. The inset shows a histogram of measured particle size. (c) SAED pattern obtained from a batch of nanoparticles and some carbon background. The diameter of the first reflection 200 rings is ∼3.4711 nm. (d) HRTEM image of a single nanoparticle with an inserted fast Fourier transform (FFT) image along the [100] zone axis. The 200 fringe is 0.297 nm. (e) HAADF image of a single nanoparticle and its EDS Pb and S elemental mappings.
