Triangular CdS nanocrystals

TEM image of a triangular CdS nanocrystal. The corresponding power spectrum is in (c). (reproduced with permission from [79, 80]). 

Pinna, N., Weiss, K., Sack-Kongehl, H., Vogel, W., Urban, J. and Pileni, M.P. (2001) Triangular CdS nanocrystals Synthesis, characterization, and stability. Langmuir, 17, 7982-7987. 

Besides rings, spontaneous formation of nanoparticle strip patterns has been observed on dewetting a dilute film of polymer coated nanoparticles floating on a water surface [577]. Hybridization of branched DNA trimers and Au nanoparticle DNA conjugates have been employed to produce discrete self-assembled nanoparticle dendrimers [578]. Self-assembly of triangular and hexagonal CdS nanocrystals into complex structures such as rods and arrows has been observed [579]. Furthermore, self-assembly of CdSe nanoparticle-copolymer mixtures has been observed wherein the copolymers assemble into cylindrical domains that dictate the distribution of the nanoparticles [580]. 

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