DICP OpenIR
Oxygen-induced migration of Ag nano-clusters on Si(111)-7 X 7 surface
Jiao, J; Pan, MH; Xue, QK; Bao, XH
KeywordScanning Tunneling Microscope Silica Silver Cluster Migration Adsorbed Oxygen
Source PublicationCHINESE JOURNAL OF CATALYSIS
2003-06-01
Volume24Issue:6Pages:433-436
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
WOS KeywordSTM ; ADSORPTION ; OXIDATION ; SILVER
AbstractThe oxygen-induced migration of Ag clusters on Si (111)-7 x 7 surface was observed by in-situ STM. All experiments were carried out in UHV system. The Si (111)-7 x 7 surface was obtained by directly heating to 1200 degreesC for several times. At the beginning of Ag clusters growth on the Si (111)-7 x 7 surface, Ag clusters formed the uniform and well-ordered arrays on the surface. The monomers, dimers and clusters of Ag were observed. After exposure to oxygen, some Ag clusters vanished and conglomerated into bigger clusters. As known, there are two kinds of adsorbed oxygen species on the Si surface, ad-ins and ins-ins. The Ag clusters appear to move easily on the surface until being trapped by adsorbed atomic oxygen and pinned around the adsorbed oxygen. It was confirmed that the migration of Ag clusters is caused by oxygen decoration. The statistical results show that the Ag clusters diffuse much easily on partly oxidized Si (111)-7 x 7 surface than on Si (111)-7 x 7 surface. It was also found that the strong interaction between Ag cluster and adsorbed oxygen species causes a distinct change of the property of adsorbed oxygen, i.e. a change of surface ins-ins oxygen into ad-ins oxygen species, reflecting the role of substrate at room temperature.
Language英语
WOS IDWOS:000184218500009
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/138218
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Inst Phys, State Key Lab Surface Phys, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Jiao, J,Pan, MH,Xue, QK,et al. Oxygen-induced migration of Ag nano-clusters on Si(111)-7 X 7 surface[J]. CHINESE JOURNAL OF CATALYSIS,2003,24(6):433-436.
APA Jiao, J,Pan, MH,Xue, QK,&Bao, XH.(2003).Oxygen-induced migration of Ag nano-clusters on Si(111)-7 X 7 surface.CHINESE JOURNAL OF CATALYSIS,24(6),433-436.
MLA Jiao, J,et al."Oxygen-induced migration of Ag nano-clusters on Si(111)-7 X 7 surface".CHINESE JOURNAL OF CATALYSIS 24.6(2003):433-436.
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