422
14 Nanostructures
(a)
(b)
Fig. 14.35 a CdSe colloidal (hexagonal) nanoparticles. From [1395]. b CsPbBr 3 perovskite (cubic) colloidal nanocrystals. Adapted from [1396] under Creative Commons Attribution (CC BY 4.0) license
Fig. 14.36 Self-organized formation of InGaAs/GaAs quantum dots during epitaxy. Left: Plan-view and cross-sectional
transmission electron micrographs. Right: Histogram of vertical and lateral size of the quantum dots. Reprinted with
permission from [1401], ©1993 AIP
0
2.2
E E
QD
2D
Barr
QD
QD
2D
GaAs
vacuum
E strain
GaAs
GaAs
InAs
(eV/nm )
3
embedded
Fig. 14.37 Distribution of strain energy for (left) uncapped island and (right) island embedded in host matrix. Numerical
values are for InAs/GaAs