Direct Gas-Phase Synthesis of Heterostructured Nanoparticles through Phase Separation and Surface Segregation

Authors

  • Y.-H. Xu,

    1. The Center for Micromagnetics and Information Technology, Department of Electrical and Computer Engineering, University of Minnesota, 200 Union St. SE, 4-174 EE/CSci, Minneapolis, MN 55455 (USA)
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  • J.-P. Wang

    1. The Center for Micromagnetics and Information Technology, Department of Electrical and Computer Engineering, University of Minnesota, 200 Union St. SE, 4-174 EE/CSci, Minneapolis, MN 55455 (USA)
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  • We thank the NanoBiotechnology Initiative of the University of Minnesota for partial financial support of this work. Some of this work was carried out at the Minnesota Characterization Facility, which is partially supported by the NSF through the NNIN program and through NSF BME 0730825. The authors thank Dr. S. McKernan and Dr. J. Basu for help with TEM analysis, Dr. J. Thomas for assistance with XPS analysis, Dr. C. Leighton for SQUID usage, and Dr. Jianmin Bai and Dr. Jiaoming Qiu for stimulating discussions. Supporting Information is available online from Wiley InterScience or from the author.

Abstract

original image

A general gas-phase synthesis approach is developed to fabricate heterostructured nanoparticles with well-defined surfaces and interfaces. The figure shows examples of various nanoparticle morphologies that can be obtained by tuning the phase separation and segregation processes, thereby leading to directional diffusion and well-defined interfaces at the single-particle level.

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