HOLOGRAPHIC IMAGES OF IODINE ATOMS ON A SILVER SURFACE FROM ELECTRON-EMISSION PATTERNS

被引:28
作者
HU, PJ
KING, DA
机构
[1] Department of Chemistry, University of Cambridge
关键词
D O I
10.1038/353831a0
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
BARTON 1 has suggested that photoelectron interference patterns may be used directly as holograms to obtain atomic-resolution images of surface structures. Bulk structures have been obtained previously by this means from experimental patterns of high-energy Kikuchi(quasi-elastically scattered) and Auger electrons 2,3. Here we test the feasibility of this technique for determination of surface structures using Auger intensity patterns obtained 4,5 from iodine chemisorbed on a pseudomorphic silver monolayer on Pt{111}. By direct numerical holographic inversion, we obtain three-dimensional images which show that iodine adatoms are located in hollows of 3-fold symmetry on the surface. The images yield the site symmetry with good atomic resolution in the surface plane, but suffer from poor resolution along the Ag-I axis. We anticipate that data with better angular resolution obtained at low temperatures would improve the spatial resolution of such images.
引用
收藏
页码:831 / 833
页数:3
相关论文
共 24 条
[1]   PHOTOELECTRON HOLOGRAPHY [J].
BARTON, JJ .
PHYSICAL REVIEW LETTERS, 1988, 61 (12) :1356-1359
[2]   PHOTOELECTRON HOLOGRAPHY = HOLOGRAPHY + PHOTOELECTRON DIFFRACTION [J].
BARTON, JJ .
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 1990, 51 :37-53
[3]  
Born M., 1980, PRINCIPLES OPTICS
[4]   EXTENDED X-RAY-ABSORPTION FINE-STRUCTURE OF SURFACE ATOMS ON SINGLE-CRYSTAL SUBSTRATES - IODINE ADSORBED ON AG(111) [J].
CITRIN, PH ;
EISENBERGER, P ;
HEWITT, RC .
PHYSICAL REVIEW LETTERS, 1978, 41 (05) :309-312
[5]  
FARRELL HH, 1984, CHEM PHYSICS SOLID B, V3, P225
[6]  
Frank D. G., 1990, MRS Bulletin, V15, P19
[7]   DIRECT IMAGING OF SURFACE ATOMIC-STRUCTURE BY ANGULAR-DISTRIBUTION AUGER MICROSCOPY - THE BARE PT(111) SURFACE [J].
FRANK, DG ;
BATINA, N ;
MCCARGAR, JW ;
HUBBARD, AT .
LANGMUIR, 1989, 5 (05) :1141-1146
[8]   IMAGING SURFACE ATOMIC-STRUCTURE BY MEANS OF AUGER ELECTRONS [J].
FRANK, DG ;
BATINA, N ;
GOLDEN, T ;
LU, F ;
HUBBARD, AT .
SCIENCE, 1990, 247 (4939) :182-188
[9]   A NEW MICROSCOPIC PRINCIPLE [J].
GABOR, D .
NATURE, 1948, 161 (4098) :777-778
[10]   ATOMIC-RESOLUTION ELECTRON HOLOGRAPHY IN SOLIDS WITH LOCALIZED SOURCES [J].
HARP, GR ;
SALDIN, DK ;
TONNER, BP .
PHYSICAL REVIEW LETTERS, 1990, 65 (08) :1012-1015