Similar wormlike palladium nanocrystals are produced by various synthetic methods such as reverse micelles and phase-transfer reactions. Palladium nanocrystals, stabilized by dodecylamine as a coating agent, are produced by chemical reduction of PdCl2 by sodium borohydride, NaBH4. A soft digestive ripening process, without any reflux, in which wormlike palladium particles go to sphere is observed in the presence of a rather large amount of dodecanethiol. The wormlike particle diameter is similar to that of the spheres produced.
source.. From wormlike to spherical palladium nanocrystals: Digestive ripening. K. Naoe, C. Petit and M.P. Pileni J. Phys. Chem. C,2007,111, 16249-16254.