Observation of a novel nucleation mechanism at step edges:: LiF molecules on Ag(111)

被引：16

作者：

Farías, D ^{[1
]}

Braun, KF ^{[1
]}

Fölsch, S ^{[1
]}

Meyer, G ^{[1
]}

Rieder, KH ^{[1
]}

机构：

[1] Free Univ Berlin, Fachbereich Phys, D-14195 Berlin, Germany

来源：

SURFACE SCIENCE | 2000年 / 470卷 / 1-2期

关键词：

scanning tunneling microscopy; growth; nucleation; alkali halides; dendritic and/or fractile surfaces;

D O I：

10.1016/S0039-6028(00)00917-1

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：

Growth of LiF on Ag(1 1 1) at low temperatures has been investigated by scanning tunnelling microscopy. Tt is found that, upon deposition at 77 K and for a large range of incidence fluxes, nucleation of LIF molecules begins on both the upper. and the lower side of the step-edges. This behaviour is very different to the well-known case of metal-on-metal growth, on which nucleation is restricted to the lower side of step edges, This new mechanism is explained by the localized charge redistribution at step sites, which favours adsorption of polar molecules on both the upper and lower step edges, and should in principle be also present in the growth of other insulator-on-metal systems at low temperatures. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：L93 / L98

页数：6

共 21 条

[1] Ultrathin films of NaCl on Cu(111):: a LEED and dynamic force microscopy study
Bennewitz, R
Barwich, V
Bammerlin, M
Loppacher, C
Guggisberg, R
Baratoff, A
Meyer, E
Güntherodt, HJ
[J]. SURFACE SCIENCE, 1999, 438 (1-3) : 289 - 296
[2] MECHANISM OF THE TRANSITION FROM FRACTAL TO DENDRITIC GROWTH OF SURFACE AGGREGATES
BRUNE, H
ROMAINCZYK, C
RODER, H
KERN, K
[J]. NATURE, 1994, 369 (6480) : 469 - 471
[3] Brune H, 1998, SURF SCI REP, V31, P121, DOI 10.1016/S0167-5729(99)80001-6
[4] Epitaxial growth of metals with high Ehrlich-Schwoebel barriers and the effect of surfactants
Camarero, J
Cros, V
Capitán, MJ
Alvarez, J
Ferrer, S
Niño, MA
Prieto, JE
Gómez, L
Ferrón, J
de Parga, ALV
Gallego, JM
de Miguel, JJ
Miranda, R
[J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1999, 69 (05): : 553 - 557
[5] Epitaxial growth and the role of surfactants
DeMiguel, JJ
[J]. SURFACE REVIEW AND LETTERS, 1997, 4 (02) : 353 - 359
[6] EHRLICH G, 1966, J CHEM PHYS, V44, P1939
[7] Self-organized patterning of an insulator-on-metal system by surface faceting and selective growth:: NaCl/Cu(211)
Fölsch, S
Helms, A
Zöphel, S
Repp, J
Meyer, G
Rieder, KH
[J]. PHYSICAL REVIEW LETTERS, 2000, 84 (01) : 123 - 126
[8] LATERAL SURFACE STARK-EFFECT IN CHEMISORBED MOLECULES
GUMHALTER, B
HERMANN, K
WANDELT, K
[J]. VACUUM, 1990, 41 (1-3) : 192 - 194
[9] Atomic resolution by STM on ultra-thin films of alkali halides: experiment and local density calculations
Hebenstreit, W
Redinger, J
Horozova, Z
Schmid, M
Podloucky, R
Varga, P
[J]. SURFACE SCIENCE, 1999, 424 (2-3) : L321 - L328
[10] PERTURBATION OF THE ADSORBATE ELECTRONIC-STRUCTURE BY LOCAL-FIELDS AT SURFACE-DEFECTS
HERMANN, K
GUMHALTER, B
WANDELT, K
[J]. SURFACE SCIENCE, 1991, 251 : 1128 - 1132

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