Preparation and characterization of 4'-donor substituted stilbene-4-thiolate monolayers and their influence on the work function of gold
M. Malicki, Zelei Guan, Sieu D. Ha, Georg Heimel, Stephen Barlow, Mariacristina Rumi, Antoin Kahn, Seth R. Marder
Princeton Institute for the Science and Technology of Materials
School of Engineering & Applied Science
Self-assembled monolayers of E-stilbene-4-thiolate (SAM1), E-40-(ethoxy)stilbene-4-thiolate (SAM2), and E-40- (dimethylamino)stilbene-4- thiolate (SAM3) on Au(111) have been obtained from reaction of ethanol solutions of the corresponding S-acetyl derivatives with gold substrates. A combination of X-ray photoelectron spectroscopy, ellipsometry, and infrared reflection absorption spectroscopy indicates that the monolayers are dense (ca. 3.3× 10 14 molecules/cm 2) and that the long molecular axes of the thiolates are approximately perpendicular to the surface. Ultraviolet photoelectron spectroscopy shows that formation of these monolayers decreases the work function of pristine Au by 0.9-1.3 eV, in part due to a bond dipole of ca. 4.4 D/molecule formed upon adsorption and partly due to the molecular dipole moment arising from the 40-π-donor substituents. However, the extent of the work function variation between SAM1, 2, and 3 is smaller than anticipated from purely electrostatic considerations.
https://doi.org/10.1021/la9004104
10.1021/la9004104
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stilbene Physics & Astronomy 100%
Ultraviolet photoelectron spectroscopy Engineering & Materials Science 84%
Work Function Chemical Compounds 83%
Gold Engineering & Materials Science 78%
Ellipsometry Engineering & Materials Science 61%
Dipole moment Engineering & Materials Science 57%
Malicki, M., Guan, Z., Ha, S. D., Heimel, G., Barlow, S., Rumi, M., Kahn, A., & Marder, S. R. (2009). Preparation and characterization of 4'-donor substituted stilbene-4-thiolate monolayers and their influence on the work function of gold. Langmuir, 25(14), 7967-7975. https://doi.org/10.1021/la9004104
Malicki, M. ; Guan, Zelei ; Ha, Sieu D. ; Heimel, Georg ; Barlow, Stephen ; Rumi, Mariacristina ; Kahn, Antoin ; Marder, Seth R. / Preparation and characterization of 4'-donor substituted stilbene-4-thiolate monolayers and their influence on the work function of gold. In: Langmuir. 2009 ; Vol. 25, No. 14. pp. 7967-7975.
@article{d32a03c8378745dfbafa1f3de173d43f,
title = "Preparation and characterization of 4'-donor substituted stilbene-4-thiolate monolayers and their influence on the work function of gold",
abstract = "Self-assembled monolayers of E-stilbene-4-thiolate (SAM1), E-40-(ethoxy)stilbene-4-thiolate (SAM2), and E-40- (dimethylamino)stilbene-4- thiolate (SAM3) on Au(111) have been obtained from reaction of ethanol solutions of the corresponding S-acetyl derivatives with gold substrates. A combination of X-ray photoelectron spectroscopy, ellipsometry, and infrared reflection absorption spectroscopy indicates that the monolayers are dense (ca. 3.3× 10 14 molecules/cm 2) and that the long molecular axes of the thiolates are approximately perpendicular to the surface. Ultraviolet photoelectron spectroscopy shows that formation of these monolayers decreases the work function of pristine Au by 0.9-1.3 eV, in part due to a bond dipole of ca. 4.4 D/molecule formed upon adsorption and partly due to the molecular dipole moment arising from the 40-π-donor substituents. However, the extent of the work function variation between SAM1, 2, and 3 is smaller than anticipated from purely electrostatic considerations.",
author = "M. Malicki and Zelei Guan and Ha, {Sieu D.} and Georg Heimel and Stephen Barlow and Mariacristina Rumi and Antoin Kahn and Marder, {Seth R.}",
doi = "10.1021/la9004104",
journal = "Langmuir",
Malicki, M, Guan, Z, Ha, SD, Heimel, G, Barlow, S, Rumi, M, Kahn, A & Marder, SR 2009, 'Preparation and characterization of 4'-donor substituted stilbene-4-thiolate monolayers and their influence on the work function of gold', Langmuir, vol. 25, no. 14, pp. 7967-7975. https://doi.org/10.1021/la9004104
Preparation and characterization of 4'-donor substituted stilbene-4-thiolate monolayers and their influence on the work function of gold. / Malicki, M.; Guan, Zelei; Ha, Sieu D.; Heimel, Georg; Barlow, Stephen; Rumi, Mariacristina; Kahn, Antoin; Marder, Seth R.
In: Langmuir, Vol. 25, No. 14, 21.07.2009, p. 7967-7975.
T1 - Preparation and characterization of 4'-donor substituted stilbene-4-thiolate monolayers and their influence on the work function of gold
AU - Malicki, M.
AU - Guan, Zelei
AU - Ha, Sieu D.
AU - Heimel, Georg
AU - Barlow, Stephen
AU - Rumi, Mariacristina
AU - Kahn, Antoin
AU - Marder, Seth R.
N2 - Self-assembled monolayers of E-stilbene-4-thiolate (SAM1), E-40-(ethoxy)stilbene-4-thiolate (SAM2), and E-40- (dimethylamino)stilbene-4- thiolate (SAM3) on Au(111) have been obtained from reaction of ethanol solutions of the corresponding S-acetyl derivatives with gold substrates. A combination of X-ray photoelectron spectroscopy, ellipsometry, and infrared reflection absorption spectroscopy indicates that the monolayers are dense (ca. 3.3× 10 14 molecules/cm 2) and that the long molecular axes of the thiolates are approximately perpendicular to the surface. Ultraviolet photoelectron spectroscopy shows that formation of these monolayers decreases the work function of pristine Au by 0.9-1.3 eV, in part due to a bond dipole of ca. 4.4 D/molecule formed upon adsorption and partly due to the molecular dipole moment arising from the 40-π-donor substituents. However, the extent of the work function variation between SAM1, 2, and 3 is smaller than anticipated from purely electrostatic considerations.
AB - Self-assembled monolayers of E-stilbene-4-thiolate (SAM1), E-40-(ethoxy)stilbene-4-thiolate (SAM2), and E-40- (dimethylamino)stilbene-4- thiolate (SAM3) on Au(111) have been obtained from reaction of ethanol solutions of the corresponding S-acetyl derivatives with gold substrates. A combination of X-ray photoelectron spectroscopy, ellipsometry, and infrared reflection absorption spectroscopy indicates that the monolayers are dense (ca. 3.3× 10 14 molecules/cm 2) and that the long molecular axes of the thiolates are approximately perpendicular to the surface. Ultraviolet photoelectron spectroscopy shows that formation of these monolayers decreases the work function of pristine Au by 0.9-1.3 eV, in part due to a bond dipole of ca. 4.4 D/molecule formed upon adsorption and partly due to the molecular dipole moment arising from the 40-π-donor substituents. However, the extent of the work function variation between SAM1, 2, and 3 is smaller than anticipated from purely electrostatic considerations.
U2 - 10.1021/la9004104
DO - 10.1021/la9004104
JO - Langmuir
JF - Langmuir
Malicki M, Guan Z, Ha SD, Heimel G, Barlow S, Rumi M et al. Preparation and characterization of 4'-donor substituted stilbene-4-thiolate monolayers and their influence on the work function of gold. Langmuir. 2009 Jul 21;25(14):7967-7975. https://doi.org/10.1021/la9004104