Nanoparticle formation of deposited Agn-clusters on free-standing graphene

被引：9
|
作者：
Al-Hada, M. [1 ,2 ]
Peters, S. [3 ]
Gregoratti, L. [2 ]
Amati, M. [2 ]
Sezen, H. [2 ]
Parisse, P. [2 ]
Selve, S. [4 ]
Niermann, T. [3 ]
Berger, D. [4 ]
Neeb, M. [5 ]
Eberhardt, W. [3 ,6 ]
机构：
[1] Univ Amran, Dept Phys, Coll Educ & Linguist, Sanaa, Yemen
[2] Elettra Sinchrotrone Trieste ScpA, SS14 Km163-5, I-34149 Trieste, Italy
[3] Tech Univ Berlin, IOAP, Str 17 Juni 135, D-10623 Berlin, Germany
[4] Tech Univ Berlin, ZELMI, Str 17 Juni 135, D-10623 Berlin, Germany
[5] Helmholtz Zentrum Berlin, WC Rontgen Campus Adlershof, D-12489 Berlin, Germany
[6] DESY, CFEL, Notkestr 85, D-22607 Hamburg, Germany
来源：
SURFACE SCIENCE | 2017年 / 665卷
关键词：
Cluster deposition; Ag-clusters; Graphene; XPS; Auger spectroscopy; SPEM; HR-TEM; Final-state Coulomb-interaction; SILVER CLUSTERS; PHOTOEMISSION; SURFACE; MICROSCOPY; GRAPHITE; METALS; GROWTH; GOLD; HOPG; AU;
D O I：
10.1016/j.susc.2017.06.002
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Size-selected Age clusters on unsupported graphene of a commercial Quantifoil sample have been investigated by surface and element-specific techniques such as transmission electron microscopy (TEM), spatially-resolved inner-shell X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES). An agglomeration of the highly mobile clusters into nm-sized Ag-nanodots of 2-3 nm is observed. Moreover, crystalline as well as non-periodic fivefold symmetric structures of the Ag-nanoparticles are evident by high-resolution TEM. Using a lognormal size-distribution as revealed by TEM, the measured positive binding energy shift of the air-exposed Ag-nanodots can be explained by the size-dependent dynamical liquid-drop model. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：108 / 113
页数：6
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