Molecular tailoring of interfacial adhesion using self-assembled monolayers

Martha E. Grady; Mark D. Losego; Paul V. Braun; Nancy R. Sottos

doi:10.1007/978-1-4614-4226-4_3

Molecular tailoring of interfacial adhesion using self-assembled monolayers

Martha E. Grady, Mark D. Losego, Paul V. Braun, Nancy R. Sottos

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

Self-assembled monolayers (SAMs) provide an enabling platform for molecular tailoring of the chemical and physical properties of an interface in an on-demand fashion. In this work, we systematically vary SAM end-group functionality and quantify the corresponding effect on interfacial adhesion between a transfer printed gold (Au) film and a fused silica substrate. SAMs with two different end groups are investigated: Dodecyltriethoxysilane and 11-mercapto-undecyltrimethoxysilane. The adhesive strength of the SAM-mediated interfaces is measured by a non-contact laser-induced spallation method at strain rates in excess of 10⁶ s^-1. A high strain rate test method is selected to facilitate comparison with forthcoming molecular dynamics simulations of the molecular failure process. Interfacial stresses are inferred from interferometric displacement measurements and finite element analysis. By making multiple measurements at increasing stress amplitudes (controlled by the laser fluence), the adhesion strengths of Au films transfer-printed on different SAM modified substrates are compared. Varying the end-group functionality drastically alters the adhesion strength of Au films, leading to improved adhesion over transfer printed films on unmodified quartz. We demonstrate a spallation strength of 24.2 ± 0.4 MPa for interfaces prepared with dodecyltriethoxysilane and 60 ± 11 MPa for interfaces prepared with 11-mercapto-undecyltrimethoxysilane confirming that interfacial bonding at the Au-thiol interface is significantly stronger than at the Au-methyl interface.

Original language	English
Title of host publication	Experimental and Applied Mechanics - Proceedings of the 2012 Annual Conference on Experimental and Applied Mechanics
Pages	21-27
Number of pages	7
DOIs	https://doi.org/10.1007/978-1-4614-4226-4_3
State	Published - 2013
Event	2012 Annual Conference on Experimental and Applied Mechanics - Costa Mesa, CA, United States Duration: Jun 11 2012 → Jun 14 2012

Publication series

Name	Conference Proceedings of the Society for Experimental Mechanics Series
Volume	4
ISSN (Print)	2191-5644
ISSN (Electronic)	2191-5652

Conference

Conference	2012 Annual Conference on Experimental and Applied Mechanics
Country/Territory	United States
City	Costa Mesa, CA
Period	6/11/12 → 6/14/12

Bibliographical note

Funding Information:
We acknowledge support from NSF CMMI 07–26742. Sample fabrication and characterization was carried out in part in the Frederick Seitz Materials Research Laboratory at UIUC, which is partially supported by the U.S. Dept. of Energy under grants DE-FG02-07ER46453 and DE-FG02-07ER46471.

Funding

We acknowledge support from NSF CMMI 07–26742. Sample fabrication and characterization was carried out in part in the Frederick Seitz Materials Research Laboratory at UIUC, which is partially supported by the U.S. Dept. of Energy under grants DE-FG02-07ER46453 and DE-FG02-07ER46471.

Funders	Funder number
Frederick Seitz Materials Research Laboratory at the University of Illinois at Urbana-Champaign
National Science Foundation (NSF)	CMMI 07–26742
Michigan State University-U.S. Department of Energy (MSU-DOE) Plant Research Laboratory	DE-FG02-07ER46453, DE-FG02-07ER46471
University of Illinois, Urbana-Champaign

Keywords

Interfacial adhesion
Laser spallation
Self-assembled monolayers

ASJC Scopus subject areas

General Engineering
Computational Mechanics
Mechanical Engineering

Access to Document

10.1007/978-1-4614-4226-4_3

Cite this

Grady, M. E., Losego, M. D., Braun, P. V., & Sottos, N. R. (2013). Molecular tailoring of interfacial adhesion using self-assembled monolayers. In Experimental and Applied Mechanics - Proceedings of the 2012 Annual Conference on Experimental and Applied Mechanics (pp. 21-27). (Conference Proceedings of the Society for Experimental Mechanics Series; Vol. 4). https://doi.org/10.1007/978-1-4614-4226-4_3

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title = "Molecular tailoring of interfacial adhesion using self-assembled monolayers",

abstract = "Self-assembled monolayers (SAMs) provide an enabling platform for molecular tailoring of the chemical and physical properties of an interface in an on-demand fashion. In this work, we systematically vary SAM end-group functionality and quantify the corresponding effect on interfacial adhesion between a transfer printed gold (Au) film and a fused silica substrate. SAMs with two different end groups are investigated: Dodecyltriethoxysilane and 11-mercapto-undecyltrimethoxysilane. The adhesive strength of the SAM-mediated interfaces is measured by a non-contact laser-induced spallation method at strain rates in excess of 106 s-1. A high strain rate test method is selected to facilitate comparison with forthcoming molecular dynamics simulations of the molecular failure process. Interfacial stresses are inferred from interferometric displacement measurements and finite element analysis. By making multiple measurements at increasing stress amplitudes (controlled by the laser fluence), the adhesion strengths of Au films transfer-printed on different SAM modified substrates are compared. Varying the end-group functionality drastically alters the adhesion strength of Au films, leading to improved adhesion over transfer printed films on unmodified quartz. We demonstrate a spallation strength of 24.2 ± 0.4 MPa for interfaces prepared with dodecyltriethoxysilane and 60 ± 11 MPa for interfaces prepared with 11-mercapto-undecyltrimethoxysilane confirming that interfacial bonding at the Au-thiol interface is significantly stronger than at the Au-methyl interface.",

keywords = "Interfacial adhesion, Laser spallation, Self-assembled monolayers",

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note = "Funding Information: We acknowledge support from NSF CMMI 07–26742. Sample fabrication and characterization was carried out in part in the Frederick Seitz Materials Research Laboratory at UIUC, which is partially supported by the U.S. Dept. of Energy under grants DE-FG02-07ER46453 and DE-FG02-07ER46471.; 2012 Annual Conference on Experimental and Applied Mechanics ; Conference date: 11-06-2012 Through 14-06-2012",

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Grady, ME, Losego, MD, Braun, PV & Sottos, NR 2013, Molecular tailoring of interfacial adhesion using self-assembled monolayers. in Experimental and Applied Mechanics - Proceedings of the 2012 Annual Conference on Experimental and Applied Mechanics. Conference Proceedings of the Society for Experimental Mechanics Series, vol. 4, pp. 21-27, 2012 Annual Conference on Experimental and Applied Mechanics, Costa Mesa, CA, United States, 6/11/12. https://doi.org/10.1007/978-1-4614-4226-4_3

Molecular tailoring of interfacial adhesion using self-assembled monolayers. / Grady, Martha E.; Losego, Mark D.; Braun, Paul V. et al.
Experimental and Applied Mechanics - Proceedings of the 2012 Annual Conference on Experimental and Applied Mechanics. 2013. p. 21-27 (Conference Proceedings of the Society for Experimental Mechanics Series; Vol. 4).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Braun, Paul V.

AU - Sottos, Nancy R.

N1 - Funding Information: We acknowledge support from NSF CMMI 07–26742. Sample fabrication and characterization was carried out in part in the Frederick Seitz Materials Research Laboratory at UIUC, which is partially supported by the U.S. Dept. of Energy under grants DE-FG02-07ER46453 and DE-FG02-07ER46471.

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N2 - Self-assembled monolayers (SAMs) provide an enabling platform for molecular tailoring of the chemical and physical properties of an interface in an on-demand fashion. In this work, we systematically vary SAM end-group functionality and quantify the corresponding effect on interfacial adhesion between a transfer printed gold (Au) film and a fused silica substrate. SAMs with two different end groups are investigated: Dodecyltriethoxysilane and 11-mercapto-undecyltrimethoxysilane. The adhesive strength of the SAM-mediated interfaces is measured by a non-contact laser-induced spallation method at strain rates in excess of 106 s-1. A high strain rate test method is selected to facilitate comparison with forthcoming molecular dynamics simulations of the molecular failure process. Interfacial stresses are inferred from interferometric displacement measurements and finite element analysis. By making multiple measurements at increasing stress amplitudes (controlled by the laser fluence), the adhesion strengths of Au films transfer-printed on different SAM modified substrates are compared. Varying the end-group functionality drastically alters the adhesion strength of Au films, leading to improved adhesion over transfer printed films on unmodified quartz. We demonstrate a spallation strength of 24.2 ± 0.4 MPa for interfaces prepared with dodecyltriethoxysilane and 60 ± 11 MPa for interfaces prepared with 11-mercapto-undecyltrimethoxysilane confirming that interfacial bonding at the Au-thiol interface is significantly stronger than at the Au-methyl interface.

AB - Self-assembled monolayers (SAMs) provide an enabling platform for molecular tailoring of the chemical and physical properties of an interface in an on-demand fashion. In this work, we systematically vary SAM end-group functionality and quantify the corresponding effect on interfacial adhesion between a transfer printed gold (Au) film and a fused silica substrate. SAMs with two different end groups are investigated: Dodecyltriethoxysilane and 11-mercapto-undecyltrimethoxysilane. The adhesive strength of the SAM-mediated interfaces is measured by a non-contact laser-induced spallation method at strain rates in excess of 106 s-1. A high strain rate test method is selected to facilitate comparison with forthcoming molecular dynamics simulations of the molecular failure process. Interfacial stresses are inferred from interferometric displacement measurements and finite element analysis. By making multiple measurements at increasing stress amplitudes (controlled by the laser fluence), the adhesion strengths of Au films transfer-printed on different SAM modified substrates are compared. Varying the end-group functionality drastically alters the adhesion strength of Au films, leading to improved adhesion over transfer printed films on unmodified quartz. We demonstrate a spallation strength of 24.2 ± 0.4 MPa for interfaces prepared with dodecyltriethoxysilane and 60 ± 11 MPa for interfaces prepared with 11-mercapto-undecyltrimethoxysilane confirming that interfacial bonding at the Au-thiol interface is significantly stronger than at the Au-methyl interface.

KW - Interfacial adhesion

KW - Laser spallation

KW - Self-assembled monolayers

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Molecular tailoring of interfacial adhesion using self-assembled monolayers

Abstract

Publication series

Conference

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

Access to Document

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