title: Seed-mediated growth of palladium nanocrystals: the effect of pseudo-halide thiocyanate ions.
abstract: In synthesis in a solution phase, adsorbates such as halides can interact selectively with different metal crystal facets and affect the final morphology of nanocrystals. Pseudo-halide thiocyanate ions (SCN-) can also adsorb on the metal surface, but they have never been used for the synthesis of shape-controlled colloidal metal nanocrystals. In this study, we first investigated the effect of SCN- on the morphology of palladium nanocrystals through a seed-mediated growth method. The presence of 1 µM SCN- in the growth solutions could lead to the formation of palladium polyhedra: truncated rhombic dodecahedra enclosed by twelve {110}, eight {111} and six {100} facets. The products were nanocubes enclosed with six {100} facets if cetyltrimethylammonium bromide (CTAB) was the only capping agent. Meanwhile, the mechanism of the effect of SCN- on the morphology of Pd nanocrystals is discussed.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.
authors.forename: Ling
authors.initials: L
authors.lastname: Zhang
authors.forename: Wenxin
authors.initials: W
authors.lastname: Niu
authors.forename: Guobao
authors.initials: G
authors.lastname: Xu
mesh_terms: D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry; D007477:Ions / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010165:Palladium / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D013861:Thiocyanates / Q000737:chemistry*
chemical_list: D002593:Cetrimonium Compounds; D007477:Ions; D013861:Thiocyanates; D010165:Palladium; C031760:thiocyanate; D000077286:Cetrimonium