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Interaction of nanoparticle properties and X-ray analytical techniques

Rainer Unterumsberger, Philipp Hönicke, Yves Kayser, Beatrix Pollakowski-Herrmann, Saeed Gholhaki, Quanmin Guo, Richard Palmer Orcid Logo, Burkhard Beckhoff

Journal of Analytical Atomic Spectrometry, Volume: 35, Issue: 5, Pages: 1022 - 1033

Swansea University Author: Richard Palmer Orcid Logo

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DOI (Published version): 10.1039/d0ja00049c

Abstract

In this work, Pt–Ti core–shell nanoparticles (NP) of 2 nm to 3 nm size and 30 000 u ± 1500 u as specified single particle mass, deposited on flat silicon substrates by means of a mass-selected cluster beam source, were used for the investigation of the modification of the X-ray Standing Wave (XSW) f...

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Published in: Journal of Analytical Atomic Spectrometry
ISSN: 0267-9477 1364-5544
Published: Royal Society of Chemistry (RSC) 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa54503
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first_indexed 2020-06-18T13:10:46Z
last_indexed 2020-08-17T03:16:02Z
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spelling 2020-08-16T11:07:09.7537479 v2 54503 2020-06-18 Interaction of nanoparticle properties and X-ray analytical techniques 6ae369618efc7424d9774377536ea519 0000-0001-8728-8083 Richard Palmer Richard Palmer true false 2020-06-18 MECH In this work, Pt–Ti core–shell nanoparticles (NP) of 2 nm to 3 nm size and 30 000 u ± 1500 u as specified single particle mass, deposited on flat silicon substrates by means of a mass-selected cluster beam source, were used for the investigation of the modification of the X-ray Standing Wave (XSW) field intensity with increasing NP surface coverage. The focus of the investigation is on the determination of the range of validity of the undisturbed flat surface approach of the XSW intensity in dependence of the actual coverage rate of the surface. Therefore, the nanoparticles were characterized using reference-free grazing incidence X-ray fluorescence analysis (GIXRF) employing radiometrically calibrated instrumentation. In addition, near-edge X-ray absorption fine structure (NEXAFS) measurements were performed to investigate the binding state of titanium in the core–shell nanoparticles which was found to be amorphous TiO2. The combination of GIXRF measurements and of the calculated XSW field intensities allows for quantification of the core–shell nanoparticle surface coverage. For six different samples, the peak surface coverage could be determined to vary from 7% to 130% of a complete monolayer-equivalent coverage. A result of the current investigation is that core–shell nanoparticles modify the intensity distribution of the XSW field with increasing surface coverage. This experimental result is in line with calculated XSW field intensity distributions at different surface coverages using an effective density approach. Journal Article Journal of Analytical Atomic Spectrometry 35 5 1022 1033 Royal Society of Chemistry (RSC) 0267-9477 1364-5544 1 5 2020 2020-05-01 10.1039/d0ja00049c COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University 2020-08-16T11:07:09.7537479 2020-06-18T11:06:48.5259153 Rainer Unterumsberger 1 Philipp Hönicke 2 Yves Kayser 3 Beatrix Pollakowski-Herrmann 4 Saeed Gholhaki 5 Quanmin Guo 6 Richard Palmer 0000-0001-8728-8083 7 Burkhard Beckhoff 8 54503__17526__6832e319d8d940cb8c732703af99f62a.pdf 54503.pdf 2020-06-18T11:10:24.8019955 Output 1622322 application/pdf Accepted Manuscript true 2021-04-17T00:00:00.0000000 true eng
title Interaction of nanoparticle properties and X-ray analytical techniques
spellingShingle Interaction of nanoparticle properties and X-ray analytical techniques
Richard Palmer
title_short Interaction of nanoparticle properties and X-ray analytical techniques
title_full Interaction of nanoparticle properties and X-ray analytical techniques
title_fullStr Interaction of nanoparticle properties and X-ray analytical techniques
title_full_unstemmed Interaction of nanoparticle properties and X-ray analytical techniques
title_sort Interaction of nanoparticle properties and X-ray analytical techniques
author_id_str_mv 6ae369618efc7424d9774377536ea519
author_id_fullname_str_mv 6ae369618efc7424d9774377536ea519_***_Richard Palmer
author Richard Palmer
author2 Rainer Unterumsberger
Philipp Hönicke
Yves Kayser
Beatrix Pollakowski-Herrmann
Saeed Gholhaki
Quanmin Guo
Richard Palmer
Burkhard Beckhoff
format Journal article
container_title Journal of Analytical Atomic Spectrometry
container_volume 35
container_issue 5
container_start_page 1022
publishDate 2020
institution Swansea University
issn 0267-9477
1364-5544
doi_str_mv 10.1039/d0ja00049c
publisher Royal Society of Chemistry (RSC)
document_store_str 1
active_str 0
description In this work, Pt–Ti core–shell nanoparticles (NP) of 2 nm to 3 nm size and 30 000 u ± 1500 u as specified single particle mass, deposited on flat silicon substrates by means of a mass-selected cluster beam source, were used for the investigation of the modification of the X-ray Standing Wave (XSW) field intensity with increasing NP surface coverage. The focus of the investigation is on the determination of the range of validity of the undisturbed flat surface approach of the XSW intensity in dependence of the actual coverage rate of the surface. Therefore, the nanoparticles were characterized using reference-free grazing incidence X-ray fluorescence analysis (GIXRF) employing radiometrically calibrated instrumentation. In addition, near-edge X-ray absorption fine structure (NEXAFS) measurements were performed to investigate the binding state of titanium in the core–shell nanoparticles which was found to be amorphous TiO2. The combination of GIXRF measurements and of the calculated XSW field intensities allows for quantification of the core–shell nanoparticle surface coverage. For six different samples, the peak surface coverage could be determined to vary from 7% to 130% of a complete monolayer-equivalent coverage. A result of the current investigation is that core–shell nanoparticles modify the intensity distribution of the XSW field with increasing surface coverage. This experimental result is in line with calculated XSW field intensity distributions at different surface coverages using an effective density approach.
published_date 2020-05-01T04:08:05Z
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score 10.999524

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