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Interactions of sub-five-nanometer diameter colloidal palladium nanoparticles in solution investigatedvialiquid cell transmission electron microscopy

机译:亚5纳米直径胶体钯纳米粒子在溶液研究中的相互作用液中透射电子显微镜

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摘要

Inter-particle interactions play important roles in controlling the structures, dispersion state and chemo-physical properties of colloidal nanoparticles (NPs) in liquid media. In this work, we prepared palladium (Pd) NPs with an average diameter of similar to 4.6 nmin situinside the liquid cell, and investigated their coupled diffusion and aggregation behaviors through liquid cell transmission electron microscopy (LCTEM).Viaanalyzing the interaction energies and forces, we derived the effective working range for repulsive double layer interaction experimentally, a value larger than two times the Debye length, suggesting a different interaction behavior of sub-5 nm NPs from that of colloidal NPs in larger sizes. Our results provide insights for the interactions between colloidal ultrafine nanoparticles in solution and will also shed light on the precisely controlled assembly of colloidal nanocrystals for practical applications.
机译:颗粒间相互作用在控制液体培养基中的胶体纳米颗粒(NPS)的结构,分散状态和化学物理性质中起重要作用。 在这项工作中,我们制备的钯(Pd)NPS平均直径与4.6nmin型液体细胞相似,并通过液体细胞透射电子显微镜(Lctem)研究了它们的偶联扩散和聚集行为.Viaanalyzing互动能量和力量, 我们通过实验衍生出有效的双层相互作用的有效工作范围,该值大于去德比长度的两个倍,暗示诸如较大尺寸的胶体NP的子5nm NP的不同的相互作用行为。 我们的结果为溶液中胶体超细纳米粒子之间的相互作用提供了见解,并且还将在胶体纳米晶体的精确控制组件上脱光,用于实际应用。

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  • 来源
    《RSC Advances》 |2020年第57期|共7页
  • 作者单位

    Tongji Univ Sch Mat Sci &

    Engn Inst New Energy Vehicles Shanghai 201804 Peoples R China;

    Zhejiang Univ Sch Mat Sci &

    Engn State Key Lab Silicon Mat Hangzhou 310027 Zhejiang Peoples R China;

    Tongji Univ Sch Mat Sci &

    Engn Inst New Energy Vehicles Shanghai 201804 Peoples R China;

    East China Univ Sci &

    Technol Sch Mat Sci &

    Engn Shanghai Key Lab Adv Polymer Mat Minist Educ Key Lab Ultrafine Mat Shanghai 200237 Peoples R China;

    Zhejiang Univ Sch Mat Sci &

    Engn State Key Lab Silicon Mat Hangzhou 310027 Zhejiang Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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