Molecularly resolved surface superstructures of self-assembled butanethiol monolayers on gold

被引:84
作者
Kang, J [1 ]
Rowntree, PA [1 ]
机构
[1] UNIV SHERBROOKE,DEPT CHIM,SHERBROOKE,PQ J1K 2R1,CANADA
关键词
D O I
10.1021/la951015r
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Self-assembled monolayers of butanethiol adsorbed onto highly uniform Au/mica films have been studied using in-air scanning tunneling microscopy (STM) and infrared spectroscopy. STM images taken of fully equilibrated films show molecularly resolved features that are believed to correspond to the methyl terminations of the organic surface. Large domains of organized adsorbates and a variant of the previously reported px root 3 superlattice structure are observed on these surfaces; using this nomenclature, the basic repeat unit of the structure reported herein corresponds to 7x root 3. Lateral variations in the elevations of striped structures are tentatively assigned to thiolates bound into fee sites of the Au(111) substrate. We have also observed molecular structure in regions of the superlattice that were structureless in UHV-STM studies. These observations suggest that the filling factor of the fully equilibrated surfaces is highly sensitive to the manner of sample preparation and storage. Large-scale desorption of thiolates does not appear to be a necessary step in the formation of highly organized films of these short-chain systems when equilibrated in thiol/methanol solutions, and the sample processing history may have significant effects on the ultimate surface topology.
引用
收藏
页码:2813 / 2819
页数:7
相关论文
共 27 条
  • [1] ATOMIC SCALE IMAGING OF ALKANETHIOLATE MONOLAYERS AT GOLD SURFACES WITH ATOMIC FORCE MICROSCOPY
    ALVES, CA
    SMITH, EL
    PORTER, MD
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (04) : 1222 - 1227
  • [2] FORMATION OF MONOLAYER FILMS BY THE SPONTANEOUS ASSEMBLY OF ORGANIC THIOLS FROM SOLUTION ONTO GOLD
    BAIN, CD
    TROUGHTON, EB
    TAO, YT
    EVALL, J
    WHITESIDES, GM
    NUZZO, RG
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1989, 111 (01) : 321 - 335
  • [3] PROBING THE DIFFERENT PHASES OF SELF-ASSEMBLED MONOLAYERS ON METAL-SURFACES - TEMPERATURE-DEPENDENCE OF THE C-H STRETCHING MODES
    BENSEBAA, F
    ELLIS, TH
    BADIA, A
    LENNOX, RB
    [J]. JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1995, 13 (03): : 1331 - 1336
  • [4] NEW MONOLAYER PHASES OF N-ALKANE THIOLS SELF-ASSEMBLED ON AU(111) - PREPARATION, SURFACE CHARACTERIZATION, AND IMAGING
    CAMILLONE, N
    EISENBERGER, P
    LEUNG, TYB
    SCHWARTZ, P
    SCOLES, G
    POIRIER, GE
    TARLOV, MJ
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1994, 101 (12) : 11031 - 11036
  • [5] SUPERLATTICE STRUCTURE AT THE SURFACE OF A MONOLAYER OF OCTADECANETHIOL SELF-ASSEMBLED ON AU(111)
    CAMILLONE, N
    CHIDSEY, CED
    LIU, GY
    SCOLES, G
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1993, 98 (04) : 3503 - 3511
  • [6] MOLECULAR ORDER AT THE SURFACE OF AN ORGANIC MONOLAYER STUDIED BY LOW-ENERGY HELIUM DIFFRACTION
    CHIDSEY, CED
    LIU, GY
    ROWNTREE, P
    SCOLES, G
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1989, 91 (07) : 4421 - 4423
  • [7] REAL-SPACE OBSERVATION OF NANOSCALE MOLECULAR DOMAINS IN SELF-ASSEMBLED MONOLAYERS
    DELAMARCHE, E
    MICHEL, B
    GERBER, C
    ANSELMETTI, D
    GUNTHERODT, HJ
    WOLF, H
    RINGSDORF, H
    [J]. LANGMUIR, 1994, 10 (09) : 2869 - 2871
  • [8] GOLD GROWN EPITAXIALLY ON MICA - CONDITIONS FOR LARGE AREA FLAT FACES
    DEROSE, JA
    THUNDAT, T
    NAGAHARA, LA
    LINDSAY, SM
    [J]. SURFACE SCIENCE, 1991, 256 (1-2) : 102 - 108
  • [9] MOLECULAR ORDERING OF ORGANOSULFUR COMPOUNDS ON AU(111) AND AU(100) - ADSORPTION FROM SOLUTION AND IN ULTRAHIGH-VACUUM
    DUBOIS, LH
    ZEGARSKI, BR
    NUZZO, RG
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1993, 98 (01) : 678 - 688
  • [10] SYNTHESIS, STRUCTURE, AND PROPERTIES OF MODEL ORGANIC-SURFACES
    DUBOIS, LH
    NUZZO, RG
    [J]. ANNUAL REVIEW OF PHYSICAL CHEMISTRY, 1992, 43 : 437 - 463