title: Size-dependence of surface plasmon resonance and oxidation for Pd nanocubes synthesized via a seed etching process.
abstract: Pd nanocubes between 8 and 50 nm in size were synthesized at the same concentration of Na2PdCl4 precursor by controlling the number of seeds formed in the nucleation stage. Increasing the concentration of FeCl3, an oxidative etchant for Pd, reduced the number of seeds and led to formation of larger Pd nanocubes. The larger nanocubes exhibited surface plasmon resonance peaks in the visible region, the locations of which matched with the results of the discrete dipole approximation calculation. While the nanocubes of 25 and 50 nm in size oxidized in air to form Pd@PdO core-shell structures, the 8-nm nanocubes were stable in air for over 90 days.
authors.affiliation: Department of Chemistry, University of Washington, Seattle, Washington 98195, USA.
authors.forename: Yujie
authors.initials: Y
authors.lastname: Xiong
authors.forename: Jingyi
authors.initials: J
authors.lastname: Chen
authors.forename: Benjamin
authors.initials: B
authors.lastname: Wiley
authors.forename: Younan
authors.initials: Y
authors.lastname: Xia
authors.forename: Yadong
authors.initials: Y
authors.lastname: Yin
authors.forename: Zhi-Yuan
authors.initials: ZY
authors.lastname: Li
mesh_terms: D003460:Crystallization / Q000379:methods*; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000032:analysis / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010084:Oxidation-Reduction; D010165:Palladium / Q000032:analysis / Q000737:chemistry*; D010316:Particle Size; D044367:Phase Transition; D020349:Surface Plasmon Resonance / Q000379:methods*
chemical_list: D010165:Palladium