Fig. 1
(a) original 2D SEM micrographs, ImageJ processed images (b) threshold image after eliminating noise (c) binary image for boundary distribution and (d) final image employed to measure particle size.
Fig. 2
FT-IR spectrum for CdS nanoparticles; the inset shows original CdS nanopowder.
Fig. 3
XRD spectrum for CdS nanoparticles.
Fig. 4
W-H plot for CdS nanoparticles.
Table 1
Structural parameters for CdS nanoparticles with corresponding standard values.
| Observed values | Standard values | Miller planes | ||||
|---|---|---|---|---|---|---|
| 2θ [deg.] | dhkl [Å ] | Intensity | 2θ [deg.] | dhkl [Å ] | Intensity | |
| 25.17 | 3.535 | 60.72 | 24.85 | 3.582 | 59.21 | (1 0 0) |
| 26.74 | 3.331 | 100.00 | 26.55 | 3.357 | 42.68 | (0 0 2) |
| 28.44 | 3.135 | 79.94 | 28.23 | 3.160 | 100.00 | (1 0 1) |
| 37.10 | 2.421 | 13.75 | 36.68 | 2.439 | 25.83 | (1 0 2) |
| 44.08 | 2.053 | 43.97 | 43.76 | 2.068 | 45.25 | (1 1 0) |
| 48.21 | 1.886 | 24.41 | 47.92 | 1.892 | 45.29 | (1 0 3) |
| 52.18 | 1.751 | 39.21 | 51.92 | 1.761 | 15.27 | (1 1 2) |
Fig. 5
UV-Vis-NIR absorption spectrum; the inset shows specific energy range second derivative of absorption spectrum.