Effects of Structure on the Tribological Properties of Organic Self-Assembled Molecular Layers

The tribological properties of self-assembled monolayers (SAMs) on Au were investigated with a focus on the effects of the structure and end groups of the molecules upon the frictional properties of the modified surfaces of the SAMs. Three kinds of organothiols were used: HS-(CH2)11-(O-CH2-CH2)3-OCH...

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Autores principales:	Miki Nakano, Koji Miyake
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2013
Materias:	sam friction ethylene glycol xps ft-ir Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/6f33ddfe72a840c9a49fb2e2e7211e4d
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spelling	oai:doaj.org-article:6f33ddfe72a840c9a49fb2e2e7211e4d2021-11-05T09:24:00ZEffects of Structure on the Tribological Properties of Organic Self-Assembled Molecular Layers1881-219810.2474/trol.8.295https://doaj.org/article/6f33ddfe72a840c9a49fb2e2e7211e4d2013-12-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/8/5/8_295/_pdf/-char/enhttps://doaj.org/toc/1881-2198The tribological properties of self-assembled monolayers (SAMs) on Au were investigated with a focus on the effects of the structure and end groups of the molecules upon the frictional properties of the modified surfaces of the SAMs. Three kinds of organothiols were used: HS-(CH2)11-(O-CH2-CH2)3-OCH3: EG3OMe, CH2-(CH2)15-SH: HDT, and OH-(CH2)16-SH: HDTOH. The SAM surfaces were characterized by contact angle measurements of pure water, X-ray photoelectron spectroscopy, and infrared reflection absorption spectroscopy. The frictional properties were examined using a pin-on-plate tribometer. The friction coefficients of the SAM surfaces were similar to the bare Au surface in the high normal load region. In the low normal load region, HDT SAMs exhibited lower friction coefficients than HDTOH SAMs. The end groups affected the friction coefficients for the same chain structures. The friction coefficients of the EG3OMe SAMs were lower than those of HDT SAMs. The HDT SAMs were thought to have well-organized structures. On the other hand, the EG3OMe SAMs probably had more flexible structures than the HDT SAMs because of their ethylene glycol chains, indicating that the chain structures as well as the end groups affected the friction coefficients of the SAMs.Miki NakanoKoji MiyakeJapanese Society of Tribologistsarticlesam frictionethylene glycolxpsft-irPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 8, Iss 5, Pp 295-302 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	sam friction ethylene glycol xps ft-ir Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	sam friction ethylene glycol xps ft-ir Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Miki Nakano Koji Miyake Effects of Structure on the Tribological Properties of Organic Self-Assembled Molecular Layers
description	The tribological properties of self-assembled monolayers (SAMs) on Au were investigated with a focus on the effects of the structure and end groups of the molecules upon the frictional properties of the modified surfaces of the SAMs. Three kinds of organothiols were used: HS-(CH2)11-(O-CH2-CH2)3-OCH3: EG3OMe, CH2-(CH2)15-SH: HDT, and OH-(CH2)16-SH: HDTOH. The SAM surfaces were characterized by contact angle measurements of pure water, X-ray photoelectron spectroscopy, and infrared reflection absorption spectroscopy. The frictional properties were examined using a pin-on-plate tribometer. The friction coefficients of the SAM surfaces were similar to the bare Au surface in the high normal load region. In the low normal load region, HDT SAMs exhibited lower friction coefficients than HDTOH SAMs. The end groups affected the friction coefficients for the same chain structures. The friction coefficients of the EG3OMe SAMs were lower than those of HDT SAMs. The HDT SAMs were thought to have well-organized structures. On the other hand, the EG3OMe SAMs probably had more flexible structures than the HDT SAMs because of their ethylene glycol chains, indicating that the chain structures as well as the end groups affected the friction coefficients of the SAMs.
format	article
author	Miki Nakano Koji Miyake
author_facet	Miki Nakano Koji Miyake
author_sort	Miki Nakano
title	Effects of Structure on the Tribological Properties of Organic Self-Assembled Molecular Layers
title_short	Effects of Structure on the Tribological Properties of Organic Self-Assembled Molecular Layers
title_full	Effects of Structure on the Tribological Properties of Organic Self-Assembled Molecular Layers
title_fullStr	Effects of Structure on the Tribological Properties of Organic Self-Assembled Molecular Layers
title_full_unstemmed	Effects of Structure on the Tribological Properties of Organic Self-Assembled Molecular Layers
title_sort	effects of structure on the tribological properties of organic self-assembled molecular layers
publisher	Japanese Society of Tribologists
publishDate	2013
url	https://doaj.org/article/6f33ddfe72a840c9a49fb2e2e7211e4d
work_keys_str_mv	AT mikinakano effectsofstructureonthetribologicalpropertiesoforganicselfassembledmolecularlayers AT kojimiyake effectsofstructureonthetribologicalpropertiesoforganicselfassembledmolecularlayers
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Effects of Structure on the Tribological Properties of Organic Self-Assembled Molecular Layers

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