Colloidal Superparticles From Artificial Atoms - Molecular Self-Assembly: Advances and Applications - page 438

bonding and hydrophobic van der Waals interactions. Indeed, the
use of these ligands has led to the formation of stable cylindrical
supercrystalline superparticles (Fig. 13.13c).

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Figure 13.13 TEM images of CdSe/CdS nanorod superparticles stabilized

with (a) PVP, (b) Gelatin, and (c) Tween-20-SH ligands. The
molecular structure of PVP, Gelatin, and Tween 20-SH are
also provided. From Ref. [21] with permission.

The resulting colloidal superparticles are dispersible in polar
solvents such as ethanol and water. TEM observations reveal that
the superparticles are cylindrical disks rather than spheres. These
cylindrical disks are mainly vertically oriented on the TEM substrate
(Fig. 13.14a), but a small amount of the disks are still laterally
oriented on the substrate, giving a side view of these superparticles
(Fig. 13.14b). The diameter of these disks is 160 nm with a relative