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Temperature Effect On Microstructure And Aggregation Behavior Of Gold Atomic Aggregates On Silicone Oil Surface

Author

Listed:
  • YUANXIN FENG

    (Department of Physics, Zhejiang University of Science and Technology, Hangzhou 310023, P. R. China)

  • CHUHANG ZHANG

    (Department of Physics, Zhejiang University of Science and Technology, Hangzhou 310023, P. R. China)

Abstract

By thermal evaporation method, gold (Au) atomic aggregates were fabricated on a silicone oil surface and the aggregation mechanism was investigated. It is found that the apparent surface coverage (ρ) of the Au aggregates dropped obviously, from 15% to 12% as the oil temperature (T) increased from 285K to 353K. Meanwhile, the average width of the aggregates gradually increased from 0.36μm to 0.50μm, indicating the aggregates combine with each other as T increased. By the atomic force microscopy observation, Au nanoparticles with diameter around 45.0 nm were observed in the aggregates, which were independent with T. Similarly, the average height of the aggregates found remain unchanged at around 10.0nm as T increased. The anomalous aggregation mechanism of Au aggregates suggests that a compact microstructure for Au aggregates is preferred at high T rather than three-dimensional (3D) growth, which is quite different from that of Ag aggregates.

Suggested Citation

  • Yuanxin Feng & Chuhang Zhang, 2016. "Temperature Effect On Microstructure And Aggregation Behavior Of Gold Atomic Aggregates On Silicone Oil Surface," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 23(06), pages 1-6, December.
    • Handle: RePEc:wsi:srlxxx:v:23:y:2016:i:06:n:s0218625x16500530
    DOI: 10.1142/S0218625X16500530
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