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231224s2012 xx |||||o 00| ||eng c |
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|a 10.1021/la303893u
|2 doi
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|a eng
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|a Pujari, Sidharam P
|e verfasserin
|4 aut
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|a Ultralow adhesion and friction of fluoro-hydro alkyne-derived self-assembled monolayers on H-terminated Si(111)
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|c 2012
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|a Text
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|a ƒaComputermedien
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|a Date Completed 23.05.2013
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|a Date Revised 21.12.2012
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a New fluorine-containing terminal alkynes were synthesized and self-assembled onto Si(111) substrates to obtain fluorine-containing organic monolayers. The monolayers were analyzed in detail by ellipsometry, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared reflection absorption spectroscopy (FT-IRRAS), static water contact angle measurements (CA), and atomic force microscopy (AFM). The SAMs exhibit excellent hydrophobicity, with static water contact angles of up to 119° and low critical surface tensions of 5-20 mN/m depending on the number of F atoms per molecule. IRRAS confirmed the formation of highly ordered monolayers, as indicated by the antisymmetric and symmetric stretching vibrations of the CH(2) moieties at 2918-2920 and 2850-2851 cm(-1), respectively. Upon increasing the number of fluorine atoms in the alkyne chains from 0 to 17, the adhesion of bare silica probes to the SAMs in air decreases from 11.6 ± 0.20 mJ/m(2) for fluorine-free (F0) alkyne monolayers to as low as 3.2 ± 0.03 mJ/m(2) for a heptadecafluoro-hexadecyne (F17)-based monolayer. Likewise, the friction coefficient decreases from 5.7 × 10(-2) to 1.2 × 10(-2). The combination of high ordering, excellent hydrophobicity, low adhesion, and low friction makes these fluoro-hydro alkyne-derived monolayers highly promising candidates for use in high-performance microelectronic devices
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|a Journal Article
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|a Spruijt, Evan
|e verfasserin
|4 aut
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|a Cohen Stuart, Martien A
|e verfasserin
|4 aut
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|a van Rijn, Cees J M
|e verfasserin
|4 aut
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|a Paulusse, Jos M J
|e verfasserin
|4 aut
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|a Zuilhof, Han
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 28(2012), 51 vom: 21. Dez., Seite 17690-700
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|x 1520-5827
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|g volume:28
|g year:2012
|g number:51
|g day:21
|g month:12
|g pages:17690-700
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|u http://dx.doi.org/10.1021/la303893u
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