首页> 中文期刊> 《研究(英文)》 >In Situ Investigation of Dynamic Silver Crystallization Driven byChemical Reaction and Diffusion

In Situ Investigation of Dynamic Silver Crystallization Driven byChemical Reaction and Diffusion

         

摘要

Rational synthesis of materials is a long-term challenging issue due to the poor understanding on the formation mechanism of material structure and the limited capability in controlling nanoscale crystallization.The emergent in situ electron microscope provides an insight to this issue.By employing an in situ scanning electron microscope,silver crystallization is investigated in real time,in which a reversible crystallization is observed.To disclose this reversible crystallization,the radicals generated by the irradiation of electron beam are calculated.It is found that the concentrations of radicals are spatiotemporally variable in the liquid cell due to the diffusion and reaction of radicals.The fluctuation of the reductive hydrated electrons and the oxidative hydroxyl radicals in the cell leads to the alternative dominance of the reduction and oxidation reactions.The reduction leads to the growth of silver crystals while the oxidation leads to their dissolution,which results in the reversible silver crystallization.A regulation of radical distribution by electron dose rates leads to the formation of diverse silver structures,confirming the dominant role of local chemical concentration in the structure evolution of materials.

著录项

  • 来源
    《研究(英文)》 |2020年第001期|P.739-749|共11页
  • 作者单位

    State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences 100190 Beijing ChinaState Key Laboratory of Marine Resource Utilization in South China Sea Hainan University 570228 Haikou China;

    State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences 100190 Beijing ChinaSchool of Chemical Engineering University of Chinese Academy of Sciences 100049 Beijing China;

    State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences 100190 Beijing ChinaSchool of Chemical Engineering University of Chinese Academy of Sciences 100049 Beijing China;

    State Key Laboratory of Marine Resource Utilization in South China Sea Hainan University 570228 Haikou China;

    State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences 100190 Beijing ChinaSchool of Chemical Engineering University of Chinese Academy of Sciences 100049 Beijing China;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 有机化学;
  • 关键词

    silver; reversible; crystallization;

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