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Interface-induced formation of onion-like alloy nanocrystals by defects engineering

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Abstract

The ability to controlled introduction of defects, particularly twin defects in Pt-based nanocrystals (NCs) provides a possibility to regulate the performance of Pt-based nanocatalyst. However, because of the high internal strain energy existed in twinned structures, the fabrication of defects in Pt-based NCs is sufficiently challenging. Here we demonstrate a “low-temperature interface-induced assembly” approach that provides precise control over Pt–Cu nanoparticles assembled at the hexadecylamine/water interface, yielding onion-like Pt–Cu NCs exposed a high density of twin defects. Moreover, a bending mechanism is proposed to elucidate the appearance of twin defects and lattice expanding (contraction) based on aberration corrected scanning transmission electron microscopy analysis. This work opens new routes to engineer defects in metalbased alloy NCs, enabling more opportunities in catalysis.

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Authors and Affiliations

  1. Department of Chemistry and Collaborative Innovation Center for Nanomaterial Science and Engineering, Tsinghua University, Beijing, 100084, China

    Wei Jia, Yuen Wu, Yifeng Chen, Jinpeng Li, Yu Wang, Zhuo Wang, Wei Zhu, Chen Chen, Qing Peng, Dingsheng Wang & Yadong Li

  2. Center of Advanced Nanocatalysis, University of Science and Technology of China (CAN-USTC), Hefei, 230026, China

    Yuen Wu & Dongsheng He

Authors
  1. Wei Jia
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  2. Yuen Wu
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  3. Yifeng Chen
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  4. Dongsheng He
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  5. Jinpeng Li
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  6. Yu Wang
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  7. Zhuo Wang
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  8. Wei Zhu
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  9. Chen Chen
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  10. Qing Peng
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  11. Dingsheng Wang
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Correspondence to Dingsheng Wang.

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Jia, W., Wu, Y., Chen, Y. et al. Interface-induced formation of onion-like alloy nanocrystals by defects engineering. Nano Res. 9, 584–592 (2016). https://doi.org/10.1007/s12274-016-0999-8

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  • DOI: https://doi.org/10.1007/s12274-016-0999-8

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