电子束辐照构筑银基纳米结构
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摘要
本文通过电子束流辐照(EBI)技术,以AgX(X=Cl~-, Br~-, etc.)为前驱体,构筑银基纳米复合结构以及单分散Ag纳米粒子。通过调节电子束流强度和电子辐照束流剂量实现了对产物组成及形貌控制,低束流强度电子辐照成功构筑了AgCl@Ag复合物,控制电子辐照剂量可以调控复合物中银单质和银盐的比例以及银纳米颗粒的介孔组装结构;高束流强度、大剂量电子辐照可以合成单分散的Ag纳米粒子,纳米粒子的粒径及形貌受束流强度大小控制。以长方体AgCl颗粒为模型,探讨了AgCl@Ag复合物组成的调控机理。
In this paper, silver-based nanocomposites and monodispersed Ag nanoparticles were fabricated by using electron beam irradiation(EBI) technology. AgX(X=Cl~-,Br~-,etc.) was used as a precursor.The composition and morphology of the products were controlled by monitoring the intensity of electron beam and the dose of electron beam irradiation.With low electron irradiation beam intensity, the AgX@Ag(X=Cl~-,Br~-,etc.) composite was successfully constructed and by controlling electron irradiation dose,both the ratio of silver and silver salts in complex and the mesoporous assembly structure of silver nanoparticles can be regulated. With high beam intensity and high dose electron irradiation,monodispersed Ag nanoparticles can be synthesized.The particle size and morphology of nanoparticles are controlled by beam intensity. Moreover,based on cuboid AgCl particles, the regulation mechanism of AgCl@Ag complex composition was discussed.
In this paper, silver-based nanocomposites and monodispersed Ag nanoparticles were fabricated by using electron beam irradiation(EBI) technology. AgX(X=Cl~-,Br~-,etc.) was used as a precursor.The composition and morphology of the products were controlled by monitoring the intensity of electron beam and the dose of electron beam irradiation.With low electron irradiation beam intensity, the AgX@Ag(X=Cl~-,Br~-,etc.) composite was successfully constructed and by controlling electron irradiation dose,both the ratio of silver and silver salts in complex and the mesoporous assembly structure of silver nanoparticles can be regulated. With high beam intensity and high dose electron irradiation,monodispersed Ag nanoparticles can be synthesized.The particle size and morphology of nanoparticles are controlled by beam intensity. Moreover,based on cuboid AgCl particles, the regulation mechanism of AgCl@Ag complex composition was discussed.
引文
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[11] 周正,田鹤,李吉学. ZnO量子点的电子束辐照生长[J]. 电子显微学报,2016,35(4):298-302.
[12] 李敏敏,曹凡,贾双凤,等. 电子束辐照制备钼酸锰纳米材料[J]. 电子显微学报,2017,36(4):328-335.
[13] BOVIN J O,WALLENBERG R,SMITH D J. Imaging of atomic clouds outside the surfaces of gold crystals by electron microscopy[J]. Nature,1985,317:47-49.
[2] BANIK M, EL-KHOURY P Z, NAG A, et al. Surface-enhanced Raman trajectories on a nano-dumbbell: transition from field to charge transfer plasmons as the spheres fuse[J]. ACS Nano,2012,6(11): 10343.
[3] ZHENG H, SMITH R K, JUN Y W,et al. Observation of single colloidal platinum nanocrystal growth trajectories[J]. Science,2009,324:1309.
[4] BURDA C, CHEN X, NARAYANAN R, et al. Chemistry and properties of nanocrystals of different shapes[J]. Cheminform, 2005,105(4):1025-1102.
[5] TANG Y,JIANG Z,XING G,et al. Efficient Ag@AgCl cubic cage photocatalysts profit from ultrafast plasmon-induced electron transfer processes[J]. Advanced Functional Materials,2013,23(23): 2932-2940.
[6] HAN L,WANG P,ZHU C,et al. Facile solvothermal synthesis of cube-like Ag@AgCl: a highly efficient visible light photocatalyst [J]. Nanoscale,2011,3(7):2931-2935.
[7] WANG P,HUANG B,QIN X,et al. Ag@AgCl: a highly efficient and stable photocatalyst active under visible light[J]. Angewandte Chemie,2008,47(41): 7931-7933.
[8] LIU J W,XU J,NI Y,et al. A family of carbon-based nanocomposite tubular structures created by in situ electron beam irradiation[J]. ACS Nano,2012,6(5):4500-4507.
[9] KRASHENINNIKOV A V, NORDLUND K. Ion and electron irradiation-induced effects in nanostructured materials[J]. Journal of Applied Physics,2010,107(7):071301.
[10] KRASHENINNIKOV A V,BANHART F. Engineering of nanostructured carbon materials with electron or ion beams[J]. Nature Materials,2007,6: 723-733.
[11] 周正,田鹤,李吉学. ZnO量子点的电子束辐照生长[J]. 电子显微学报,2016,35(4):298-302.
[12] 李敏敏,曹凡,贾双凤,等. 电子束辐照制备钼酸锰纳米材料[J]. 电子显微学报,2017,36(4):328-335.
[13] BOVIN J O,WALLENBERG R,SMITH D J. Imaging of atomic clouds outside the surfaces of gold crystals by electron microscopy[J]. Nature,1985,317:47-49.