Structure of SAMs generated from functionalized thiols on gold

K. Tamada; J. Nagasswa; F. Nakanishi; K. Abe; M. Hara; W. Knoll; T. Ishida; H. Fukushima; S. Miyashita; T. Usui; T. Koini; T. R. Lee

doi:10.1016/S0040-6090(98)00618-X

Structure of SAMs generated from functionalized thiols on gold

K. Tamada, J. Nagasswa, F. Nakanishi, K. Abe, M. Hara, W. Knoll, T. Ishida, H. Fukushima, S. Miyashita, T. Usui, T. Koini, T. R. Lee

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21 Citations (Scopus)

Abstract

The structure and growth of two classes of self-assembled monolayers (SAMs) on Au(111) derived from the adsorption of the functionalized thiol hexyl-azobenzenethiol (12-(4-(4-hexylphenylazo)phenoxy)dodecane-1-thiol) and the partially fluorinated alkanethiols (CF₃(CF₂)₉(CH₂)₁₁SH and CF₃(CF₂)₇(CH₂)₆SH were examined. The structural properties of the SAMs were strongly influenced by the interactions between the functional groups comprising the tails of the molecules. Molecular resolution atomic force microscopy (AFM) images of the hexyl-azobenzenethiol SAMs revealed an expanded lattice (nearest neighbor spacing, a · 0.53 nm, b · 0.56 nm, and angle between the two axes, φ · 85·) relative to those of simple azobenzene-terminated SAMs. The expanded lattice probably results from the presence of the hexyl tail groups. The structure of the SAMs formed from the fluorinated alkanethiols was also probed by AFM, Fourier transform infrared spectroscopy (FTIR-RAS) and dynamic contact angle measurements. The degree of molecular tilt of the fluorocarbon halix appears to be influenced by the length of the methyl enespacer moieties, which might result from the introduction of flexibility into the molecular chains.

Original language	English
Pages (from-to)	150-155
Number of pages	6
Journal	Thin Solid Films
Volume	327-329
Issue number	1-2
DOIs	https://doi.org/10.1016/S0040-6090(98)00618-X
Publication status	Published - 1998
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Surfaces and Interfaces
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

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10.1016/S0040-6090(98)00618-X

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title = "Structure of SAMs generated from functionalized thiols on gold",

abstract = "The structure and growth of two classes of self-assembled monolayers (SAMs) on Au(111) derived from the adsorption of the functionalized thiol hexyl-azobenzenethiol (12-(4-(4-hexylphenylazo)phenoxy)dodecane-1-thiol) and the partially fluorinated alkanethiols (CF3(CF2)9(CH2)11SH and CF3(CF2)7(CH2)6SH were examined. The structural properties of the SAMs were strongly influenced by the interactions between the functional groups comprising the tails of the molecules. Molecular resolution atomic force microscopy (AFM) images of the hexyl-azobenzenethiol SAMs revealed an expanded lattice (nearest neighbor spacing, a · 0.53 nm, b · 0.56 nm, and angle between the two axes, φ · 85·) relative to those of simple azobenzene-terminated SAMs. The expanded lattice probably results from the presence of the hexyl tail groups. The structure of the SAMs formed from the fluorinated alkanethiols was also probed by AFM, Fourier transform infrared spectroscopy (FTIR-RAS) and dynamic contact angle measurements. The degree of molecular tilt of the fluorocarbon halix appears to be influenced by the length of the methyl enespacer moieties, which might result from the introduction of flexibility into the molecular chains.",

author = "K. Tamada and J. Nagasswa and F. Nakanishi and K. Abe and M. Hara and W. Knoll and T. Ishida and H. Fukushima and S. Miyashita and T. Usui and T. Koini and Lee, {T. R.}",

year = "1998",

doi = "10.1016/S0040-6090(98)00618-X",

language = "English",

volume = "327-329",

pages = "150--155",

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TY - JOUR

T1 - Structure of SAMs generated from functionalized thiols on gold

AU - Tamada, K.

AU - Nagasswa, J.

AU - Nakanishi, F.

AU - Abe, K.

AU - Hara, M.

AU - Knoll, W.

AU - Ishida, T.

AU - Fukushima, H.

AU - Miyashita, S.

AU - Usui, T.

AU - Koini, T.

AU - Lee, T. R.

PY - 1998

Y1 - 1998

N2 - The structure and growth of two classes of self-assembled monolayers (SAMs) on Au(111) derived from the adsorption of the functionalized thiol hexyl-azobenzenethiol (12-(4-(4-hexylphenylazo)phenoxy)dodecane-1-thiol) and the partially fluorinated alkanethiols (CF3(CF2)9(CH2)11SH and CF3(CF2)7(CH2)6SH were examined. The structural properties of the SAMs were strongly influenced by the interactions between the functional groups comprising the tails of the molecules. Molecular resolution atomic force microscopy (AFM) images of the hexyl-azobenzenethiol SAMs revealed an expanded lattice (nearest neighbor spacing, a · 0.53 nm, b · 0.56 nm, and angle between the two axes, φ · 85·) relative to those of simple azobenzene-terminated SAMs. The expanded lattice probably results from the presence of the hexyl tail groups. The structure of the SAMs formed from the fluorinated alkanethiols was also probed by AFM, Fourier transform infrared spectroscopy (FTIR-RAS) and dynamic contact angle measurements. The degree of molecular tilt of the fluorocarbon halix appears to be influenced by the length of the methyl enespacer moieties, which might result from the introduction of flexibility into the molecular chains.

AB - The structure and growth of two classes of self-assembled monolayers (SAMs) on Au(111) derived from the adsorption of the functionalized thiol hexyl-azobenzenethiol (12-(4-(4-hexylphenylazo)phenoxy)dodecane-1-thiol) and the partially fluorinated alkanethiols (CF3(CF2)9(CH2)11SH and CF3(CF2)7(CH2)6SH were examined. The structural properties of the SAMs were strongly influenced by the interactions between the functional groups comprising the tails of the molecules. Molecular resolution atomic force microscopy (AFM) images of the hexyl-azobenzenethiol SAMs revealed an expanded lattice (nearest neighbor spacing, a · 0.53 nm, b · 0.56 nm, and angle between the two axes, φ · 85·) relative to those of simple azobenzene-terminated SAMs. The expanded lattice probably results from the presence of the hexyl tail groups. The structure of the SAMs formed from the fluorinated alkanethiols was also probed by AFM, Fourier transform infrared spectroscopy (FTIR-RAS) and dynamic contact angle measurements. The degree of molecular tilt of the fluorocarbon halix appears to be influenced by the length of the methyl enespacer moieties, which might result from the introduction of flexibility into the molecular chains.

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JO - Thin Solid Films

JF - Thin Solid Films

IS - 1-2

ER -

Structure of SAMs generated from functionalized thiols on gold

Abstract

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