Morphology and microstructure of Ag islands of aggregated atoms on oil surfaces

doi:10.1088/1674-1056/20/6/066103

中国物理B ›› 2011, Vol. 20 ›› Issue (6): 66103-066103.doi: 10.1088/1674-1056/20/6/066103

Morphology and microstructure of Ag islands of aggregated atoms on oil surfaces

张初航¹, 吕能¹, 张晓飞¹, Saida Ajeeb¹, 夏阿根¹, 叶高翔²

(1)Department of Physics, Zhejiang University, Hangzhou 310027, China; (2)Department of Physics, Zhejiang University, Hangzhou 310027, China;Department of Physics, Hangzhou Normal University, Hangzhou 310036, China

收稿日期:2010-11-15 修回日期:2010-12-28 出版日期:2011-06-15 发布日期:2011-06-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11074215 and 50701037) and the Fundamental Research Funds for the Central Universities (Grant No. 2010QNA3025).

Morphology and microstructure of Ag islands of aggregated atoms on oil surfaces

Zhang Chu-Hang(张初航)^a), Lü Neng(吕能)^a), Zhang Xiao-Fei(张晓飞)^a), Saida Ajeeb^a), Xia A-Gen(夏阿根)^a), and Ye Gao-Xiang(叶高翔)^a)b)†

^a Department of Physics, Zhejiang University, Hangzhou 310027, China; ^b Department of Physics, Hangzhou Normal University, Hangzhou 310036, China

Received:2010-11-15 Revised:2010-12-28 Online:2011-06-15 Published:2011-06-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11074215 and 50701037) and the Fundamental Research Funds for the Central Universities (Grant No. 2010QNA3025).

摘要/Abstract

摘要： The morphology evolution of silver islands on silicone oil surfaces is measured and the microstructure of the islands is studied. The deposited Ag atoms diffuse and aggregate on the oil surface and then Ag islands with the width of the order of 10²-nm form. After the samples are removed from the vacuum chamber, the immediate measurement shows that the apparent Ag coverage of the total area decays with the magnitude up to (23.0±3.8)% in few minutes. In the following two hours, the samples are kept in the ambient atmosphere and several unexpected results are detected: 1) as the topological structure of the islands evolves, the total area of each island decreases gradually and the maximum decrement measured is around 20%; 2) if an island breaks and becomes two small pieces, the total area decreases obviously; 3) however, if two small islands meet and stick together, a sudden increment of the total area is observed. These phenomena, mirroring the evolution process of the island microstructure, are resulted from both the diffusion of the atoms and the combination of the defects inside the islands.

关键词: liquid substrate, island, microstructure, morphology

Abstract: The morphology evolution of silver islands on silicone oil surfaces is measured and the microstructure of the islands is studied. The deposited Ag atoms diffuse and aggregate on the oil surface and then Ag islands with the width of the order of 10²-nm form. After the samples are removed from the vacuum chamber, the immediate measurement shows that the apparent Ag coverage of the total area decays with the magnitude up to (23.0±3.8)% in few minutes. In the following two hours, the samples are kept in the ambient atmosphere and several unexpected results are detected: 1) as the topological structure of the islands evolves, the total area of each island decreases gradually and the maximum decrement measured is around 20%; 2) if an island breaks and becomes two small pieces, the total area decreases obviously; 3) however, if two small islands meet and stick together, a sudden increment of the total area is observed. These phenomena, mirroring the evolution process of the island microstructure, are resulted from both the diffusion of the atoms and the combination of the defects inside the islands.

Key words: liquid substrate, island, microstructure, morphology

中图分类号: (Structure of nanoscale materials)

61.46.-w

61.46.Hk (Nanocrystals) 64.70.Nd (Structural transitions in nanoscale materials) 65.40.gp (Surface energy)

张初航, 吕能, 张晓飞, Saida Ajeeb, 夏阿根, 叶高翔. Morphology and microstructure of Ag islands of aggregated atoms on oil surfaces[J]. 中国物理B, 2011, 20(6): 66103-066103.

Zhang Chu-Hang(张初航), Lü Neng(吕能), Zhang Xiao-Fei(张晓飞), Saida Ajeeb, Xia A-Gen(夏阿根), and Ye Gao-Xiang(叶高翔). Morphology and microstructure of Ag islands of aggregated atoms on oil surfaces[J]. Chin. Phys. B, 2011, 20(6): 66103-066103.

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Morphology and microstructure of Ag islands of aggregated atoms on oil surfaces

Morphology and microstructure of Ag islands of aggregated atoms on oil surfaces

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