Seed-MediatedGrowthofNearlyMonodispersePalladium.pdfVIP

CRYSTAL GROWTH Seed-Mediated Growth of Nearly Monodisperse Palladium DESIGN Nanocubes with Controllable Sizes 2008 Wenxin Niu,†,‡ Zhi-Yuan Li,§ Lihong Shi,†,‡ Xiaoqing Liu,†,‡ Haijuan Li,†,‡ Shuang Han,†,‡ VOL. 8, NO. 12 Jiuan Chen,†,‡ and Guobao Xu*,† 4440–4444 State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China, Graduate UniVersity of the Chinese Academy of Sciences, and Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China Recei Ved March 4, 2008; ReVised Manuscript ReceiVed May 6, 2008 ABSTRACT: Nearly monodisperse Pd nanocubes with controllable sizes were synthesized through a seed-mediated growth approach. By using Pd nanocubes of 22 nm in size as seeds, the morphology of the as-grown nanostructures was fixed as single-crystalline, which enabled us to rationally tune the size of Pd nanocubes. The formation mechanism of initial 22 nm nanocubes was also discussed. The size-dependent surface plasmon resonance properties of the as-synthesized Pd nanocubes were investigated. Compared with previous methods, the yield, monodispersity, perfection of the shape formation, and the range of size control of these nanocubes are all improved. These Pd nanocubes may have potential interests in surface-enhanced Raman scatteri