Morphology and surface plasma changes of Au-Pt bimetallic nanoparticles

Hao Ming Chen; Hsin Chieh Peng; Ru Shi Liu; Shu Fen Hu; Hwo Shuenn Sheu

doi:10.1166/jnn.2006.199

Morphology and surface plasma changes of Au-Pt bimetallic nanoparticles

Hao Ming Chen, Hsin Chieh Peng, Ru Shi Liu^*, Shu Fen Hu, Hwo Shuenn Sheu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

In this study, we examined the amount-dependent change in morphology in a series of Au-Pt bimetallic nanoparticles synthesized using chemical reduction. The amount of Au precursor was kept constant throughout the experiment. The Au/Pt molar ratio was varied from 1/1 to 1/4 to synthesize Pt shell layers with different thicknesses. We observed a remarkable shift of the surface plasmon band at around 410 nm. By high-resolution transmission electron microscopy (HRTEM) and energy-dispersive spectrometry (EDS), the composition of the shell layer was found to be Pt-enriched Au-Pt alloy. As the concentration of Pt increases, Pt clusters (ca. 1.8 nm in diameter) form a string-like shape on the surface of nanoparticles.

Original language	English
Pages (from-to)	1411-1415
Number of pages	5
Journal	Journal of Nanoscience and Nanotechnology
Volume	6
Issue number	5
DOIs	https://doi.org/10.1166/jnn.2006.199
Publication status	Published - 2006 May
Externally published	Yes

Keywords

Au/Pt
Bimetallic
Core-Shell
Nanoparticles

ASJC Scopus subject areas

Bioengineering
General Chemistry
Biomedical Engineering
General Materials Science
Condensed Matter Physics

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abstract = "In this study, we examined the amount-dependent change in morphology in a series of Au-Pt bimetallic nanoparticles synthesized using chemical reduction. The amount of Au precursor was kept constant throughout the experiment. The Au/Pt molar ratio was varied from 1/1 to 1/4 to synthesize Pt shell layers with different thicknesses. We observed a remarkable shift of the surface plasmon band at around 410 nm. By high-resolution transmission electron microscopy (HRTEM) and energy-dispersive spectrometry (EDS), the composition of the shell layer was found to be Pt-enriched Au-Pt alloy. As the concentration of Pt increases, Pt clusters (ca. 1.8 nm in diameter) form a string-like shape on the surface of nanoparticles.",

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AU - Chen, Hao Ming

AU - Peng, Hsin Chieh

AU - Liu, Ru Shi

AU - Hu, Shu Fen

AU - Sheu, Hwo Shuenn

PY - 2006/5

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AB - In this study, we examined the amount-dependent change in morphology in a series of Au-Pt bimetallic nanoparticles synthesized using chemical reduction. The amount of Au precursor was kept constant throughout the experiment. The Au/Pt molar ratio was varied from 1/1 to 1/4 to synthesize Pt shell layers with different thicknesses. We observed a remarkable shift of the surface plasmon band at around 410 nm. By high-resolution transmission electron microscopy (HRTEM) and energy-dispersive spectrometry (EDS), the composition of the shell layer was found to be Pt-enriched Au-Pt alloy. As the concentration of Pt increases, Pt clusters (ca. 1.8 nm in diameter) form a string-like shape on the surface of nanoparticles.

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KW - Bimetallic

KW - Core-Shell

KW - Nanoparticles

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Morphology and surface plasma changes of Au-Pt bimetallic nanoparticles

Abstract

Keywords

ASJC Scopus subject areas

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