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Formation of Two-Dimensional Micelles on Graphene: Multi-Scale Theoretical and Experimental Study

Benjamin J. Robinson, Steven W. D. Bailey, Luke J. O’Driscoll, David Visontai, Daniel J. Welsh, Albertus B. Mostert, Riccardo Mazzocco, Caroline Rabot, Samuel P. Jarvis, Oleg V. Kolosov, Martin R. Bryce, Colin Lambert, Bernard Mostert Orcid Logo

ACS Nano, Volume: 11, Issue: 3, Pages: 3404 - 3412

Swansea University Author: Bernard Mostert Orcid Logo

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DOI (Published version): 10.1021/acsnano.7b01071

Abstract

Graphene and related two-dimensional (2D) materials possess outstanding electronic and mechanical properties, chemical stability, and high surface area. However, to realize graphene’s potential for a range of applications in materials science and nanotechnology there is a need to understand and cont...

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Published in: ACS Nano
ISSN: 1936-0851 1936-086X
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa38477
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However, to realize graphene&#x2019;s potential for a range of applications in materials science and nanotechnology there is a need to understand and control the interaction of graphene with tailored high-performance surfactants designed to facilitate the preparation, manipulation, and functionalization of new graphene systems. Here we report a combined experimental and theoretical study of the surface structure and dynamics on graphene of pyrene-oligoethylene glycol (OEG) -based surfactants, which have previously been shown to disperse carbon nanotubes in water. Molecular self-assembly of the surfactants on graphitic surfaces is experimentally monitored and optimized using a graphene coated quartz crystal microbalance in ambient and vacuum environments. Real-space nanoscale resolution nanomechanical and topographical mapping of submonolayer surfactant coverage, using ultrasonic and atomic force microscopies both in ambient and ultrahigh vacuum, reveals complex, multilength-scale self-assembled structures. Molecular dynamics simulations show that at the nanoscale these structures, on atomically flat graphitic surfaces, are dependent upon the surfactant OEG chain length and are predicted to display a previously unseen class of 2D self-arranged &#x201C;starfish&#x201D; micelles (2DSMs). 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spelling 2020-07-13T15:59:47.4080068 v2 38477 2018-02-09 Formation of Two-Dimensional Micelles on Graphene: Multi-Scale Theoretical and Experimental Study a353503c976a7338c7708a32e82f451f 0000-0002-9590-2124 Bernard Mostert Bernard Mostert true false 2018-02-09 SPH Graphene and related two-dimensional (2D) materials possess outstanding electronic and mechanical properties, chemical stability, and high surface area. However, to realize graphene’s potential for a range of applications in materials science and nanotechnology there is a need to understand and control the interaction of graphene with tailored high-performance surfactants designed to facilitate the preparation, manipulation, and functionalization of new graphene systems. Here we report a combined experimental and theoretical study of the surface structure and dynamics on graphene of pyrene-oligoethylene glycol (OEG) -based surfactants, which have previously been shown to disperse carbon nanotubes in water. Molecular self-assembly of the surfactants on graphitic surfaces is experimentally monitored and optimized using a graphene coated quartz crystal microbalance in ambient and vacuum environments. Real-space nanoscale resolution nanomechanical and topographical mapping of submonolayer surfactant coverage, using ultrasonic and atomic force microscopies both in ambient and ultrahigh vacuum, reveals complex, multilength-scale self-assembled structures. Molecular dynamics simulations show that at the nanoscale these structures, on atomically flat graphitic surfaces, are dependent upon the surfactant OEG chain length and are predicted to display a previously unseen class of 2D self-arranged “starfish” micelles (2DSMs). While three-dimensional micelles are well-known for their widespread uses ranging from microreactors to drug-delivery vehicles, these 2DSMs possess the highly desirable and tunable characteristics of high surface affinity coupled with unimpeded mobility, opening up strategies for processing and functionalizing 2D materials. Journal Article ACS Nano 11 3 3404 3412 1936-0851 1936-086X 2D micelles; graphene; molecular dynamics; scanning probe microscopy; surfactants 28 3 2017 2017-03-28 10.1021/acsnano.7b01071 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2020-07-13T15:59:47.4080068 2018-02-09T12:18:19.1835580 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Benjamin J. Robinson 1 Steven W. D. Bailey 2 Luke J. O’Driscoll 3 David Visontai 4 Daniel J. Welsh 5 Albertus B. Mostert 6 Riccardo Mazzocco 7 Caroline Rabot 8 Samuel P. Jarvis 9 Oleg V. Kolosov 10 Martin R. Bryce 11 Colin Lambert 12 Bernard Mostert 0000-0002-9590-2124 13 38477__17698__f4c5ab1bc6fb41379ea1009b14e6ce2a.pdf 38477.pdf 2020-07-13T15:58:02.4796536 Output 6883155 application/pdf Version of Record true This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. true
title Formation of Two-Dimensional Micelles on Graphene: Multi-Scale Theoretical and Experimental Study
spellingShingle Formation of Two-Dimensional Micelles on Graphene: Multi-Scale Theoretical and Experimental Study
Bernard Mostert
title_short Formation of Two-Dimensional Micelles on Graphene: Multi-Scale Theoretical and Experimental Study
title_full Formation of Two-Dimensional Micelles on Graphene: Multi-Scale Theoretical and Experimental Study
title_fullStr Formation of Two-Dimensional Micelles on Graphene: Multi-Scale Theoretical and Experimental Study
title_full_unstemmed Formation of Two-Dimensional Micelles on Graphene: Multi-Scale Theoretical and Experimental Study
title_sort Formation of Two-Dimensional Micelles on Graphene: Multi-Scale Theoretical and Experimental Study
author_id_str_mv a353503c976a7338c7708a32e82f451f
author_id_fullname_str_mv a353503c976a7338c7708a32e82f451f_***_Bernard Mostert
author Bernard Mostert
author2 Benjamin J. Robinson
Steven W. D. Bailey
Luke J. O’Driscoll
David Visontai
Daniel J. Welsh
Albertus B. Mostert
Riccardo Mazzocco
Caroline Rabot
Samuel P. Jarvis
Oleg V. Kolosov
Martin R. Bryce
Colin Lambert
Bernard Mostert
format Journal article
container_title ACS Nano
container_volume 11
container_issue 3
container_start_page 3404
publishDate 2017
institution Swansea University
issn 1936-0851
1936-086X
doi_str_mv 10.1021/acsnano.7b01071
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
document_store_str 1
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description Graphene and related two-dimensional (2D) materials possess outstanding electronic and mechanical properties, chemical stability, and high surface area. However, to realize graphene’s potential for a range of applications in materials science and nanotechnology there is a need to understand and control the interaction of graphene with tailored high-performance surfactants designed to facilitate the preparation, manipulation, and functionalization of new graphene systems. Here we report a combined experimental and theoretical study of the surface structure and dynamics on graphene of pyrene-oligoethylene glycol (OEG) -based surfactants, which have previously been shown to disperse carbon nanotubes in water. Molecular self-assembly of the surfactants on graphitic surfaces is experimentally monitored and optimized using a graphene coated quartz crystal microbalance in ambient and vacuum environments. Real-space nanoscale resolution nanomechanical and topographical mapping of submonolayer surfactant coverage, using ultrasonic and atomic force microscopies both in ambient and ultrahigh vacuum, reveals complex, multilength-scale self-assembled structures. Molecular dynamics simulations show that at the nanoscale these structures, on atomically flat graphitic surfaces, are dependent upon the surfactant OEG chain length and are predicted to display a previously unseen class of 2D self-arranged “starfish” micelles (2DSMs). While three-dimensional micelles are well-known for their widespread uses ranging from microreactors to drug-delivery vehicles, these 2DSMs possess the highly desirable and tunable characteristics of high surface affinity coupled with unimpeded mobility, opening up strategies for processing and functionalizing 2D materials.
published_date 2017-03-28T03:48:39Z
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score 11.016235

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