High resolution nanoscale chemical analysis of bitumen surface microstructures

Abstract Surface microstructures of bitumen are key sites in atmospheric photo-oxidation leading to changes in the mechanical properties and finally resulting in cracking and rutting of the material. Investigations at the nanoscale remain challenging. Conventional combination of optical microscopy a...

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Autores principales:	Ayse N. Koyun, Julia Zakel, Sven Kayser, Hartmut Stadler, Frank N. Keutsch, Hinrich Grothe
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6c663787ca564760bb4bdec1ca6d79fa
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spelling	oai:doaj.org-article:6c663787ca564760bb4bdec1ca6d79fa2021-12-02T14:33:57ZHigh resolution nanoscale chemical analysis of bitumen surface microstructures10.1038/s41598-021-92835-32045-2322https://doaj.org/article/6c663787ca564760bb4bdec1ca6d79fa2021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92835-3https://doaj.org/toc/2045-2322Abstract Surface microstructures of bitumen are key sites in atmospheric photo-oxidation leading to changes in the mechanical properties and finally resulting in cracking and rutting of the material. Investigations at the nanoscale remain challenging. Conventional combination of optical microscopy and spectroscopy cannot resolve the submicrostructures due to the Abbe restriction. For the first time, we report here respective surface domains, namely catana, peri and para phases, correlated to distinct molecules using combinations of atomic force microscopy with infrared spectroscopy and with correlative time of flight—secondary ion mass spectrometry. Chemical heterogeneities on the surface lead to selective oxidation due to their varying susceptibility to photo-oxidation. It was found, that highly oxidized compounds, are preferentially situated in the para phase, which are mainly asphaltenes, emphasising their high oxidizability. This is an impressive example how chemical visualization allows elucidation of the submicrostructures and explains their response to reactive oxygen species from the atmosphere.Ayse N. KoyunJulia ZakelSven KayserHartmut StadlerFrank N. KeutschHinrich GrotheNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ayse N. Koyun Julia Zakel Sven Kayser Hartmut Stadler Frank N. Keutsch Hinrich Grothe High resolution nanoscale chemical analysis of bitumen surface microstructures
description	Abstract Surface microstructures of bitumen are key sites in atmospheric photo-oxidation leading to changes in the mechanical properties and finally resulting in cracking and rutting of the material. Investigations at the nanoscale remain challenging. Conventional combination of optical microscopy and spectroscopy cannot resolve the submicrostructures due to the Abbe restriction. For the first time, we report here respective surface domains, namely catana, peri and para phases, correlated to distinct molecules using combinations of atomic force microscopy with infrared spectroscopy and with correlative time of flight—secondary ion mass spectrometry. Chemical heterogeneities on the surface lead to selective oxidation due to their varying susceptibility to photo-oxidation. It was found, that highly oxidized compounds, are preferentially situated in the para phase, which are mainly asphaltenes, emphasising their high oxidizability. This is an impressive example how chemical visualization allows elucidation of the submicrostructures and explains their response to reactive oxygen species from the atmosphere.
format	article
author	Ayse N. Koyun Julia Zakel Sven Kayser Hartmut Stadler Frank N. Keutsch Hinrich Grothe
author_facet	Ayse N. Koyun Julia Zakel Sven Kayser Hartmut Stadler Frank N. Keutsch Hinrich Grothe
author_sort	Ayse N. Koyun
title	High resolution nanoscale chemical analysis of bitumen surface microstructures
title_short	High resolution nanoscale chemical analysis of bitumen surface microstructures
title_full	High resolution nanoscale chemical analysis of bitumen surface microstructures
title_fullStr	High resolution nanoscale chemical analysis of bitumen surface microstructures
title_full_unstemmed	High resolution nanoscale chemical analysis of bitumen surface microstructures
title_sort	high resolution nanoscale chemical analysis of bitumen surface microstructures
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/6c663787ca564760bb4bdec1ca6d79fa
work_keys_str_mv	AT aysenkoyun highresolutionnanoscalechemicalanalysisofbitumensurfacemicrostructures AT juliazakel highresolutionnanoscalechemicalanalysisofbitumensurfacemicrostructures AT svenkayser highresolutionnanoscalechemicalanalysisofbitumensurfacemicrostructures AT hartmutstadler highresolutionnanoscalechemicalanalysisofbitumensurfacemicrostructures AT franknkeutsch highresolutionnanoscalechemicalanalysisofbitumensurfacemicrostructures AT hinrichgrothe highresolutionnanoscalechemicalanalysisofbitumensurfacemicrostructures
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High resolution nanoscale chemical analysis of bitumen surface microstructures

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