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Structure-conserving spontaneous transformations between nanoparticles

Author

Listed:
  • K. R. Krishnadas

    (DST Unit of Nanoscience (DST UNS) and Thematic Unit of Excellence (TUE), Indian Institute of Technology Madras)

  • Ananya Baksi

    (DST Unit of Nanoscience (DST UNS) and Thematic Unit of Excellence (TUE), Indian Institute of Technology Madras)

  • Atanu Ghosh

    (DST Unit of Nanoscience (DST UNS) and Thematic Unit of Excellence (TUE), Indian Institute of Technology Madras)

  • Ganapati Natarajan

    (DST Unit of Nanoscience (DST UNS) and Thematic Unit of Excellence (TUE), Indian Institute of Technology Madras)

  • Thalappil Pradeep

    (DST Unit of Nanoscience (DST UNS) and Thematic Unit of Excellence (TUE), Indian Institute of Technology Madras)

Abstract

Ambient, structure- and topology-preserving chemical reactions between two archetypal nanoparticles, Ag25(SR)18 and Au25(SR)18, are presented. Despite their geometric robustness and electronic stability, reactions between them in solution produce alloys, AgmAun(SR)18 (m+n=25), keeping their M25(SR)18 composition, structure and topology intact. We demonstrate that a mixture of Ag25(SR)18 and Au25(SR)18 can be transformed to any arbitrary alloy composition, AgmAun(SR)18 (n=1–24), merely by controlling the reactant compositions. We capture one of the earliest events of the process, namely the formation of the dianionic adduct, (Ag25Au25(SR)36)2−, by electrospray ionization mass spectrometry. Molecular docking simulations and density functional theory (DFT) calculations also suggest that metal atom exchanges occur through the formation of an adduct between the two clusters. DFT calculations further confirm that metal atom exchanges are thermodynamically feasible. Such isomorphous transformations between nanoparticles imply that microscopic pieces of matter can be transformed completely to chemically different entities, preserving their structures, at least in the nanometric regime.

Suggested Citation

  • K. R. Krishnadas & Ananya Baksi & Atanu Ghosh & Ganapati Natarajan & Thalappil Pradeep, 2016. "Structure-conserving spontaneous transformations between nanoparticles," Nature Communications, Nature, vol. 7(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms13447
    DOI: 10.1038/ncomms13447
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    Cited by:

    1. Yuan Zhong & Jiangwei Zhang & Tingting Li & Wenwu Xu & Qiaofeng Yao & Min Lu & Xue Bai & Zhennan Wu & Jianping Xie & Yu Zhang, 2023. "Suppression of kernel vibrations by layer-by-layer ligand engineering boosts photoluminescence efficiency of gold nanoclusters," Nature Communications, Nature, vol. 14(1), pages 1-12, December.

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