Synthesis of palladium and platinum chalcogenide nanoparticles via cation exchange reaction

PHYS 434

Stacey E. Wark, swark@mail.chem.tamu.edu and Dong Hee Son, dhson@mail.chem.tamu.edu. Department of Chemistry, Texas A&M University, College Station, TX 77842
Palladium and platinum chalcogenide (sulfide, selenide and telluride) nanoparticles were formed through a cation exchange reaction between cadmium chalcogenide nanocrystals and either a palladium or platinum salt under two-phase reaction conditions. The resulting nanoparticles were amorphous while the morphology of the initial cadmium chalcogenide nanocrystals was preserved with varying degrees. Upon heating, the amorphous nanoparticles crystallized to the thermodynamically stable stoichiometries of PdS, Pd17Se15, PdTe, PdTe2, Pt5Se4 and Pt2Te3. By controlling the reaction condition, partial cation exchange was achieved and lead to core/shell and hollow structures as well as linear heterostructures.
 

PHYS Poster Session - Nanostructured Materials and Nanophotonics
7:30 PM-10:00 PM, Wednesday, April 9, 2008 Morial Convention Center -- Hall A, Poster

Division of Physical Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008