In Situ Investigation of Dynamic Silver Crystallization Driven by Chemical Reaction and Diffusion

	In Situ Investigation of Dynamic Silver Crystallization Driven by Chemical Reaction and Diffusion
	Liu Ting 1; Dou Xiangyu 1; Xu Yonghui 1; Chen Yongjun 2; Han Yongsheng 1
刊名	Research
	2020
卷号	2020 期号:3
关键词	Science Q
ISSN号	2639-5274
英文摘要	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.
资助项目	[National Natural Science Foundation of China] ; [State Key Laboratory of Multiphase Complex Systems] ; [MPCS Facility Upgradation Program]
语种	英语
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/47501]
专题	中国科学院过程工程研究所
作者单位	1.中国科学院过程工程研究所 2.海南大学
推荐引用方式 GB/T 7714	Liu Ting,Dou Xiangyu,Xu Yonghui,et al. In Situ Investigation of Dynamic Silver Crystallization Driven by Chemical Reaction and Diffusion[J]. Research,2020,2020(3).
APA	Liu Ting,Dou Xiangyu,Xu Yonghui,Chen Yongjun,&Han Yongsheng.(2020).In Situ Investigation of Dynamic Silver Crystallization Driven by Chemical Reaction and Diffusion.Research,2020(3).
MLA	Liu Ting,et al."In Situ Investigation of Dynamic Silver Crystallization Driven by Chemical Reaction and Diffusion".Research 2020.3(2020).