1990
DOI: 10.1063/1.104234
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Imaging alkane layers at the liquid/graphite interface with the scanning tunneling microscope

Abstract: We have directly imaged n-alkane layers adsorbed at the liquid/graphite interface using a scanning tunneling microscope. The layers possessed a high degree of two-dimensional ordering. The adsorbate was observed to enhance the tunneling current, and the atomic structure of the images was dominated by features associated with the substrate. These systems are excellent vehicles for studies concerning the imaging mechanism of adsorbed organic layers because of their stability and simplicity.

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Cited by 420 publications
(301 citation statements)
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“…A set of n-alkanes (C N H 2Nϩ2 , Nϭ5, 6,7,8,10,12,14,16,18,20,22,24,26,44, 60͒ were purchased having purities of Ͼ98% from Aldrich Chemicals. Acros Chemicals supplied n-alkanes (Nϭ28, 32, 36, 40͒ in purities of Ͼ97%.…”
Section: Methodsmentioning
confidence: 99%
“…A set of n-alkanes (C N H 2Nϩ2 , Nϭ5, 6,7,8,10,12,14,16,18,20,22,24,26,44, 60͒ were purchased having purities of Ͼ98% from Aldrich Chemicals. Acros Chemicals supplied n-alkanes (Nϭ28, 32, 36, 40͒ in purities of Ͼ97%.…”
Section: Methodsmentioning
confidence: 99%
“…In addition, the physisorption of alkanes has been studied on Au(111), 6 Pt(111), 7,8 Pt(110), 9 Ir(110), 10 Cu(100), 11 Ru(001), 12 and Cu(111), 13 under UHV conditions. However, the local arrangement of the alkanes on a metal surface has not been investigated in contrast to numerous reports of alkane adlayers on graphite at the solid/liquid interface, [14][15][16][17][18][19][20][21] although studies using molecular dynamics 12,[22][23][24][25][26][27] and infrared spectroscopy [28][29][30][31][32] under UHV conditions have been carried out after the reports by Firment and Somorjai. Furthermore, the structure of the alkane/metal interface in solution was not investigated.…”
Section: Introductionmentioning
confidence: 99%
“…3,24,25 Of these systems, probably the best characterized are monolayers of C32 and C24 on high-quality graphite basal-plane surfaces that have been investigated by scanning tunneling microscopy ͑STM͒, [10][11][12][13][14] x-ray diffraction, 15 and neutron scattering. [16][17][18][19][20][21] Graphite substrates also have the advantage that relatively reliable empirical atom-atom potentials are available for representing the molecule/graphite basal-plane interaction.…”
Section: Introductionmentioning
confidence: 99%
“…Previous experimental studies of the monolayer structure of intermediate-length alkanes have focused on high-quality solid surfaces of graphite, [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] Ag͑111͒, 22,23 and SiO 2 . 3,24,25 Of these systems, probably the best characterized are monolayers of C32 and C24 on high-quality graphite basal-plane surfaces that have been investigated by scanning tunneling microscopy ͑STM͒, [10][11][12][13][14] x-ray diffraction, 15 and neutron scattering.…”
Section: Introductionmentioning
confidence: 99%