Variation of the local work function of MgO(001) surface by palladium deposition

被引:5
作者
Di Salvo, JP [1 ]
Gillet, E [1 ]
机构
[1] Fac Sci & Tech St Jerome, SERMEC, F-13397 Marseille 20, France
关键词
D O I
10.1142/S0218625X98000670
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
A study of ultrathin palladium films deposited on MgO(100) is reported. The early studies of the growth are in situ investigated at 300 K and 600 K by secondary ion mass spectrometry used in static mode (SSIMS). The variation of ion species typical of the metal deposit (Pd+, Pd-2(+)) and of the substrate (MgO+) is analyzed as a function of the deposit mean thickness. The results show that Pd films grow initially by sticking of isolated adatoms on sites leading to the formation of 2D islands until a critical coverage which depends on the temperature. Thereafter a second layer begins to grow that leads to 3D flat clusters at high temperatures. The SSIMS method enables us to determine quantitatively the local work function of both palladium and MgO surfaces. Changes in the electronic structure of these systems during deposition of the two first Pd layers suggest a strong influence of the oxide support.
引用
收藏
页码:363 / 367
页数:5
相关论文
共 30 条
[1]   X-RAY PHOTOELECTRON-SPECTROSCOPY STUDY OF THE VAPOR-DEPOSITION OF COPPER ONTO A MGO(100) SURFACE [J].
ALSTRUP, I ;
MOLLER, PJ .
APPLIED SURFACE SCIENCE, 1988, 33-4 :143-151
[2]  
ARAKAWA ET, 1988, J PHYS CHEM SOLIDS, V29, P392
[3]   EXPERIMENTAL AND THEORETICAL APPROACHES TO THE IONIZATION PROCESS IN SECONDARY-ION EMISSION [J].
BLAISE, G ;
NOURTIER, A .
SURFACE SCIENCE, 1979, 90 (02) :495-547
[4]   THE CHARACTERIZATION OF MODEL CU/RU(001) BIMETALLIC CATALYSTS BY STATIC SIMS WITH XPS AND TPD [J].
BROWN, A ;
VICKERMAN, JC .
SURFACE SCIENCE, 1984, 140 (01) :261-274
[5]   STATIC SIMS STUDIES OF ADSORBATE STRUCTURE .3. CO ON PD(100) [J].
BROWN, A ;
VICKERMAN, JC .
SURFACE SCIENCE, 1985, 151 (2-3) :319-332
[6]   SIMS STUDIES OF ADSORBATE STRUCTURE .1. CO ADSORPTION ON RU(001), NI(111) AND NI(100) [J].
BROWN, A ;
VICKERMAN, JC .
SURFACE SCIENCE, 1982, 117 (1-3) :154-164
[7]   Metal films and particles on oxide surfaces: Structural, electronic and chemisorptive properties [J].
Campbell, CT .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1996, 92 (09) :1435-1445
[8]   A SURFACE ANALYTICAL STUDY OF THE FORMATION AND ADHESION OF CHROMIUM FILMS ON ALUMINA [J].
EALET, B ;
ROBRIEUX, B ;
GILLET, E .
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY, 1992, 6 (11) :1221-1231
[9]   PALLADIUM ALUMINA INTERFACE - INFLUENCE OF THE OXIDE STOICHIOMETRY STUDIED BY EELS AND XPS [J].
EALET, B ;
GILLET, E .
SURFACE SCIENCE, 1993, 281 (1-2) :91-101
[10]  
EALET B, 1996, IN PRESS SURF SCI