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General strategy for doping rare earth metals into Au–ZnO core–shell nanospheres

Published online by Cambridge University Press:  02 December 2019

René Zeto Open the ORCID record for René Zeto [Opens in a new window] ,
Daniel Cummins ,
Arynn Gallegos ,
Mike Shao  and
Andrea M. Armani
René Zeto
Affiliation:
Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, USA
Daniel Cummins
Affiliation:
Department of Biomedical Engineering, University of Southern California, Los Angeles, California 90089, USA
Arynn Gallegos
Affiliation:
Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, California 90089, USA
Mike Shao
Affiliation:
Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, USA
Andrea M. Armani*
Affiliation:
Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, USA; Department of Biomedical Engineering, University of Southern California, Los Angeles, California 90089, USA; and Ming Hsieh Department of Electrical and Computer Engineering, University of Southern, Los Angeles, California 90089, USA
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Multifunctional nanoparticles are an emerging area of research, impacting numerous fields ranging from biomedical applications to energy. While initial core–shell structures consisted of similar materials, such as Au–Ag or CdTe–CdSe nanoparticles, recent work has expanded this line of investigation to include particles of dissimilar materials. However, there are several challenges when synthesizing dissimilar material systems. In this work, a method for doping the shell of an Au–ZnO nanosphere is demonstrated. Several metal dopants are investigated, including Cu, Ce, Er, Nd, Tm, and Yb. The ZnO shell is nucleated on the gold nanosphere core via an ascorbic acid–assisted growth, and the dopant is intercalated uniformly into the shell during the self-assembly phase of the shell formation. The doping and polycrystalline shell are confirmed using a series of qualitative and quantitative methods. This multi-material nanoparticle synthesis strategy opens the door for future applications in sensing, photocatalysis, and bioimaging.

Keywords

core/shellnanoscalenanostructure
Type
Article
Information
Journal of Materials Research , Volume 34 , Issue 23 , 16 December 2019 , pp. 3877 - 3886
Copyright
Copyright © Materials Research Society 2019 

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