Dependence of the lattice strain of PbS nanocrystals on solid size: (a) nanospheres, (b) nanocubes, and (c) nanorods. The atomic diameter d 0 = 0.297 nm. 18
Comparison of theoretical predictions (solid lines) with experimental measurements and calculations 10,18,24,26,52–54 (symbols) of the band gap shift for PbS nanocrystals: (a) nanospheres, (b) nanocubes, and (c) nanorods. Note that the case in (c) is the PbS nanowires (L ≫ D); the aspect ratio (lateral vs perpendicular size) ranges for the PbS nanocubes cited from Ref. 26 in (c) between 2 and 3.
(a) The relationship between the relative shift of band gap and strain of PbS nanospheres, nanocubes, and nanorods (L ≫ D). (b) Dependence of absorption coefficient of three types of PbS nanocrystals on size under the condition of incident wavelength at 400 nm.
The relationship among the absorption coefficient and incident wavelength as well as crystal size for PbS nanocrystals: (a) nanospheres, (b) nanocubes, and (c) nanorods.
The absorption coefficient of PbS nanocrystals with different shapes at 400 nm.
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