Chain length dependence of the structure of alkane thiol films on Au(111)

Balzer, Frank; Gerlach, R.; Polanski, G.; Rubahn, Horst‐Günter

doi:10.1016/s0009-2614(97)00666-0

Cited by 44 publications

(43 citation statements)

References 25 publications

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“…Pa·sec), as discussed by Kondoh et al [132]. Nevertheless, sorne [118,133,134] report that a SAM can become kinetically trapped, where the mono layer remains in a metastable intermediate phase (Iying-down phase, for example). The concept of kinetics trapping contradicts the assertion by Kondoh (i.e.…”

Section: Kinetics Of Alkanethiol Sam Formationmentioning

confidence: 90%

Surface Stress, Kinetics, and Structure of Alkanethiol Self-Assembled Monolayers

et al. 2004

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The surface stress induced during the formation of alkanethiol self-assembled monolayers (SAMs) on gold from the vapor phase was measured using a micromechanical cantilever-based chemical sensor. Simultaneous in situ thickness measurements were carried out using ellipsometry. Ex situ scanning tunneling microscopy was performed in air to ascertain the final monolayer structure. The evolution of the surface stress induced during coverage-dependent structural phase transitions reveals features not apparent in average ellipsometric thickness measurements. These results show that both the kinetics of SAM formation and the resulting SAM structure are strongly influenced both by the surface structure of the underlying gold substrate and by the impingement rate of the alkanethiol onto the gold surface. In particular, the adsorption onto gold surfaces having large, flat grains produces high-quality self-assembled monolayers. An induced compressive surface stress of 15.9 ± 0.6 N/m results when a c(4×2) dodecanethiol SAM forms on gold. However, the SAMs formed on small-grained gold are incomplete and an induced surface stress of only 0.51 ± 0.02 N/m results. The progression to a fully formed SAM whose alkyl chains adopt a vertical (standing-up) orientation is clearly inhibited in the case of a small-grained gold substrate and is promoted in the case of a large-grained gold substrate.

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Section: Kinetics Of Alkanethiol Sam Formationmentioning

confidence: 90%

Surface Stress, Kinetics, and Structure of Alkanethiol Self-Assembled Monolayers

et al. 2004

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“…The chains show a tilt of 308 with respect to normal [56]. A detailed low-energy electron diffraction (LEED) study has been reported by Balzer et al, where they explained the chain length dependence of the structure of SAMs on Au [57]. Helium diffraction studies suggested that the alkanethiols form a commensurate ð p 3 Â p 3ÞR308 overlayer [58].…”

Section: Microscopy and Diffractionmentioning

confidence: 92%

Current understanding of the structure, phase transitions and dynamics of self-assembled monolayers on two- and three-dimensional surfaces

Sandhyarani

Pradeep

2003

International Reviews in Physical Chemistry

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“…At low coverage, molecules were observed to form rectangular unit cells (p × √ 3), the so called striped phases, where the periodicity p gives the stripe separation along the gold nearest neighbor azimuthal direction and depends on the film density and the length of the molecule. 3,4,10,[15][16][17][18][19][20][21][22][23] Upon increasing the coverage, the contribution of the interaction between alkyl chains becomes more important and allows the formation of a standing up configuration with the ( √ 3 × √ 3)R30 • structure. 4,20,24,25 For many other applications like controlled protein adsorption 5,6 or polymer growth on a surface, 26 however, utilization of mixed SAMs, a) Author to whom correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the deposition and thermal behavior of striped phases of unsymmetric disulfide self-assembled monolayers on Au(111): The case of 11-hydroxyundecyl decyl disulfide

Albayrak

Karabuğa

Bracco

et al. 2015

The Journal of Chemical Physics

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Self-assembled monolayers (SAMs) of unsymmetric disulfides on Au(111) are used to form mixed SAMs that can be utilized in many applications. Here, we have studied 11-hydroxyundecyl decyl disulfide (CH3-(CH2)9-S-S-(CH2)11-OH, HDD) SAMs produced by supersonic molecular beam deposition and characterized by He diffraction. The film growth was monitored at different temperatures up to a coverage which corresponds to a full lying down phase and the diffraction analysis shows that below 250 K the phase is different from the phase measured above 300 K. During the annealing of the film, two phase transitions were observed, at 250 K and 350 K. The overall data suggest that the former is related to an irreversible phase separation of HDD above 250 K to decanethiolate (-S-(CH2)9-CH3, DTT) and hydroxyundecylthiolate (-S-(CH2)11-OH, MUDT), while the latter to a reversible melting of the film. Above 450 K, the specular intensity shows an increase related to film desorption and different chemisorbed states were observed with energies in the same range as observed for decanethiol (H-S-(CH2)9-CH3, DT) and mercaptoundecanol (H-S-(CH2)11-OH, MUD) SAMs.

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Chain length dependence of the structure of alkane thiol films on Au(111)

Cited by 44 publications

References 25 publications

Surface Stress, Kinetics, and Structure of Alkanethiol Self-Assembled Monolayers

Surface Stress, Kinetics, and Structure of Alkanethiol Self-Assembled Monolayers

Current understanding of the structure, phase transitions and dynamics of self-assembled monolayers on two- and three-dimensional surfaces

Investigation of the deposition and thermal behavior of striped phases of unsymmetric disulfide self-assembled monolayers on Au(111): The case of 11-hydroxyundecyl decyl disulfide

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