Wafer-scale controlled Au/Pt bimetallic flowerlike structure array

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The combining of the bottom-up with top-down techniques is essential to construct novel micro-/ nano-materials according to the requirements of its end applications. This paper describes a pattern-directed method that combines the advantages of photolithography and electrochemical synthesis to construct a wafer-scale Au/Pt bimetallic flowerlike structure array. With this technique, Au/Pt bimetallic flowerlike structure arrays are homogeneously and highly-selectively synthesized from Au patterns with different spacing, dimensions and shapes on a 4-inch silicon wafer. The Au/Pt flowers are also well-constructed in the different designed array such as 'KAIST' and 'NOBEL'. The surface morphology of the Au/Pt flower was observed using scanning electron microscope (SEM). The chemical composition of the bimetallic flower was confirmed using energy dispersive spectrometer (EDS) and X-ray electron spectroscopy (XPS). The X-ray diffraction (XRD) patterns of the Au pitch and Si substrate on a wafer were studied to reveal the highly-selective growth from Au pitches. A time-dependent evolution clearly presents the different growth stages of Au/Pt flower. The analysis of Au/Pt flower growth process in an individual Au pitch shows an edge-selective particle development mechanism. The method can be applied to the construction of other interesting nano/microflower arrays of metals or metal oxides. The results would be helpful for the creation of the flower with regular physical attributes (shapes and sizes) and guiding the design of a perfect array for technological innovations.
Publisher
WORLD GOLD COUNCIL
Issue Date
2008-04
Language
English
Article Type
Article
Keywords

AU-PT; METAL NANOPARTICLES; OPTICAL-PROPERTIES; GOLD; LITHOGRAPHY; NANOSTRUCTURES; CATALYSTS; GROWTH; ELECTRODEPOSITION; NUCLEATION

Citation

GOLD BULLETIN, v.41, no.1, pp.58 - 65

ISSN
0017-1557
DOI
10.1007/BF03215624
URI
http://hdl.handle.net/10203/11712
Appears in Collection
EE-Journal Papers(저널논문)
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