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Nano Research 2017, 10(10): 3509-3521 https://doi.org/10.1007/s12274-017-1562-y
Research Article | Issue | Published: 13 June 2017

Ag+-assisted heterogeneous growth of concave Pd@Au nanocubes for surface enhanced Raman scattering (SERS)

Show Author's Information Bo Jiang1,2,§,  Li Xu2,§,  Wei Chen2,  Chao Zou2,  Yun Yang2( ),  Yunzhi Fu1( ),  Shaoming Huang2( )
College of Materials and Chemical Engineering Hainan UniversityHaikou 570228 China
Nanomaterials and Chemistry Key Laboratory Wenzhou UniversityWenzhou 325027 China

§ Bo Jiang and Li Xu contributed equally to this work.

Keywords:
nanocube, concave, seeded growth, heterogeneous growth
Cite this article:
Jiang B, Xu L, Chen W, et al. Ag+-assisted heterogeneous growth of concave Pd@Au nanocubes for surface enhanced Raman scattering (SERS). Nano Research, 2017, 10(10): 3509-3521. https://doi.org/10.1007/s12274-017-1562-y
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Abstract Full text About this article

AgNO3 is often used in the preparation of Au nanostructures since Ag-based substances (AgBS) can selectively be adsorbed on Au(100) and significantly modulate the growth of Au nanocrystals. High-index-faceted Au nanostructures have demonstrated excellent performance in catalysis and surface enhanced Raman scattering (SERS), thus attracting the interest of many researchers in the past several decades. Herein, high-index-faceted Pd@Au concave nanocubes (CNCs) were prepared using AgBS as growth-directing agents in the heterogeneous growth of Au on Pd nanocubes (NCs). During the growth of Pd@Au CNCs, Au atoms are initially deposited on the Pd{100} facets leading to the formation of thin Au shells, and then AgBS are quickly adsorbed on the formed Au(100), favoring the growth along <111> and the formation of Pd@Au CNCs. Transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), energy dispersive spectroscopy (EDS), high angle annular dark field (HAADF), and scanning transmission electron microscopy EDS (STEM- EDS) were used to systematically investigate the growth of Pd@Au CNCs. We also demonstrated that the high-index-faceted Pd@Au CNCs exhibited excellent SERS performances.


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About this article

Ag+-assisted heterogeneous growth of concave Pd@Au nanocubes for surface enhanced Raman scattering (SERS)

Show Author's information Bo Jiang1,2,§, Li Xu2,§, Wei Chen2, Chao Zou2, Yun Yang2( ), Yunzhi Fu1( ), Shaoming Huang2( )
College of Materials and Chemical Engineering Hainan UniversityHaikou 570228 China
Nanomaterials and Chemistry Key Laboratory Wenzhou UniversityWenzhou 325027 China

§ Bo Jiang and Li Xu contributed equally to this work.

Abstract

AgNO3 is often used in the preparation of Au nanostructures since Ag-based substances (AgBS) can selectively be adsorbed on Au(100) and significantly modulate the growth of Au nanocrystals. High-index-faceted Au nanostructures have demonstrated excellent performance in catalysis and surface enhanced Raman scattering (SERS), thus attracting the interest of many researchers in the past several decades. Herein, high-index-faceted Pd@Au concave nanocubes (CNCs) were prepared using AgBS as growth-directing agents in the heterogeneous growth of Au on Pd nanocubes (NCs). During the growth of Pd@Au CNCs, Au atoms are initially deposited on the Pd{100} facets leading to the formation of thin Au shells, and then AgBS are quickly adsorbed on the formed Au(100), favoring the growth along <111> and the formation of Pd@Au CNCs. Transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), energy dispersive spectroscopy (EDS), high angle annular dark field (HAADF), and scanning transmission electron microscopy EDS (STEM- EDS) were used to systematically investigate the growth of Pd@Au CNCs. We also demonstrated that the high-index-faceted Pd@Au CNCs exhibited excellent SERS performances.

Keywords: nanocube, concave, seeded growth, heterogeneous growth

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Publication history
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Acknowledgements

Publication history

Received: 02 December 2016
Revised: 25 February 2017
Accepted: 26 February 2017
Published: 13 June 2017
Issue date: October 2017

Copyright

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2017

Acknowledgements

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 21471117, 21173159, 21563009, and 51420105002).

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