Dear Bhaskar Bhatt,
I have attached research articles on nanoparticle with angular shape.
01. Article Obviously Angular, Cuboid-Shaped TiO2 Nanowire Arrays Decora...
02. Article Materials Science. Watching nanoparticles grow
I hope I have answered your question.
With Best Wishes,
Samir G. Pandya
You may also see the attached papers:
Article One pot synthesis of amine-functionalized and angular-shaped...
https://pubs.rsc.org/en/content/articlehtml/2017/ra/c6ra28495g
Article Magnetic properties of elliptical and stadium-shaped nanopar...
http://science.sciencemag.org/content/sci/272/5270/1924.full.pdf
You can try to read SV Suryanarayana, LB Kong (NUS, Singapore), BS Murty, IIT madras research articles and books. They have given very clear details.
I wish you good luck.
Many articles are already suggested above for the synthesis of angular shape nanoparticles. But in my opinion, deviation in the various shapes of nanoparticles can be attributed to a number of scenarios that may include:
a) the equilibrium condition never being reached during synthesis;
b) the surface energies for various facets being different from those in a vacuum due to anisotropic interactions with a capping agent, impurity, or solvent;
c) twin defects being included during nucleation and growth to form shapes such as decahedron and icosahedron with a total free energy lower than that of the Wulff polyhedron;
d) and use of an elevated temperature for the synthesis.
Attached are some more articles which might be useful for you:
[1] Article Shape-Controlled Synthesis of Gold and Silver Nanoparticles
[2] https://core.ac.uk/download/pdf/82574475.pdf
[3]https://pdfs.semanticscholar.org/2686/9fa9f1aea216b6a89a02284daea238285771.pdf
Best Wishes
Through top-down approach: i.e. crushing of bulk material and then fractionation of the nanoparticles.
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