Document Detail


Synthesis of Pd-Au bimetallic nanocrystals via controlled overgrowth.
MedLine Citation:
PMID:  20136138     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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 HAuCl(4) 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.
Authors:
Byungkwon Lim; Hirokazu Kobayashi; Taekyung Yu; Jinguo Wang; Moon J Kim; Zhi-Yuan Li; Matthew Rycenga; Younan Xia
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of the American Chemical Society     Volume:  132     ISSN:  1520-5126     ISO Abbreviation:  J. Am. Chem. Soc.     Publication Date:  2010 Mar 
Date Detail:
Created Date:  2010-02-24     Completed Date:  2010-06-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503056     Medline TA:  J Am Chem Soc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2506-7     Citation Subset:  IM    
Affiliation:
Department of Biomedical Engineering, Washington University, St. Louis, Missouri 63130, USA.
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MeSH Terms
Descriptor/Qualifier:
Crystallization / methods
Gold / chemistry*
Nanoparticles / chemistry*,  ultrastructure
Nanotechnology / methods*
Palladium / chemistry*
Chemical
Reg. No./Substance:
7440-05-3/Palladium; 7440-57-5/Gold

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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