Synthesis of pd-au bimetallic nanocrystals via controlled overgrowth

Byungkwon Lim, Hirokazu Kobayashi, Taekyung Yu, Jinguo Wang, Moon J. Kim, Zhi Yuan Li, Matthew Rycenga, Younan Xia

Research output: Contribution to journalArticlepeer-review

234 Citations (Scopus)

Abstract

(Figure Presented) This paper describes the synthesis of Pd-Au bimetallic nanocrystals with controlled morphologies via a one-step seeded-growth method. Two different reducing agents, namely, L-ascorbic acid and citric acid, were utilized for the reduction of HAuCl4 in an aqueous solution to control the overgrowth of Au on cubic Pd seeds. When L-ascorbic acid was used as the reducing agent, conformal overgrowth of Au on the Pd nanocubes led to the formation of Pd-Au nanocrystals with a core-shell structure. On the contrary, localized overgrowth of Au was observed when citric acid was used as the reducing agent, producing Pd-Au bimetallic dimers. Through this morphological control, we were able to tune the localized surface plasmon resonance peaks of Pd-Au bimetallic nanostructures in the visible region.

Original languageEnglish
Pages (from-to)2506-2507
Number of pages2
JournalJournal of the American Chemical Society
Volume132
Issue number8
DOIs
Publication statusPublished - Feb 24 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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