Probing Heterogeneity in Attenuated Total Reflection Surface-Enhanced Infrared Absorption Spectroscopy (ATR-SEIRAS) Response with Synchrotron Infrared Microspectroscopy.
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| Title: | Probing Heterogeneity in Attenuated Total Reflection Surface-Enhanced Infrared Absorption Spectroscopy (ATR-SEIRAS) Response with Synchrotron Infrared Microspectroscopy. |
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| Authors: | Tu, Kaiyang1,2 (AUTHOR), Morhart, Tyler A.1,2 (AUTHOR), Read, Stuart T.2 (AUTHOR), Rosendahl, Scott M.2 (AUTHOR), Burgess, Ian J.1 (AUTHOR) ian.burgess@usask.ca |
| Source: | Applied Spectroscopy. Sep2021, Vol. 75 Issue 9, p1198-1206. 9p. |
| Subjects: | Infrared absorption, Attenuated total reflectance, Infrared spectroscopy, Metallic films, Fourier transform spectrometers, Heterogeneity |
| Abstract: | The heterogeneity of metal island films electrodeposited on conductive metal oxide modified internal reflection elements is shown to provide a variable attenuated total reflection surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) response. A self-assembled monolayer of a ferrocene-terminated thiol monolayer (FcC11SH) was formed on the gold islands covering a single substrate, which was measured using both a conventional spectrometer and a custom-built horizontal microscope. Cyclic voltammetry and ATR-SEIRAS results reveal that the FcC11SH-modified substrate undergoes a reversible electron transfer and an associated re-orientation of both the ferrocene/ferrocenium headgroup and the hydrocarbon backbone. The magnitude of the absorption signal arising from the redox changes in the monolayer, as well as the IR signature arising from the ingress/egress of the perchlorate counterions, is shown to depend significantly on the size of the infrared beam spot when using a conventional Fourier transform infrared spectrometer. By performing equivalent measurements on a horizontal microscope, the primary cause of the differences in the signal level is found to be the heterogeneity in the density of gold islands on the conductive metal oxide. Graphical Abstract [ABSTRACT FROM AUTHOR] |
| Copyright of Applied Spectroscopy is the property of Sage Publications Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 152521368 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Probing Heterogeneity in Attenuated Total Reflection Surface-Enhanced Infrared Absorption Spectroscopy (ATR-SEIRAS) Response with Synchrotron Infrared Microspectroscopy. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Tu%2C+Kaiyang%22">Tu, Kaiyang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Morhart%2C+Tyler+A%2E%22">Morhart, Tyler A.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Read%2C+Stuart+T%2E%22">Read, Stuart T.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rosendahl%2C+Scott+M%2E%22">Rosendahl, Scott M.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Burgess%2C+Ian+J%2E%22">Burgess, Ian J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> ian.burgess@usask.ca</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Applied+Spectroscopy%22">Applied Spectroscopy</searchLink>. Sep2021, Vol. 75 Issue 9, p1198-1206. 9p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Infrared+absorption%22">Infrared absorption</searchLink><br /><searchLink fieldCode="DE" term="%22Attenuated+total+reflectance%22">Attenuated total reflectance</searchLink><br /><searchLink fieldCode="DE" term="%22Infrared+spectroscopy%22">Infrared spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Metallic+films%22">Metallic films</searchLink><br /><searchLink fieldCode="DE" term="%22Fourier+transform+spectrometers%22">Fourier transform spectrometers</searchLink><br /><searchLink fieldCode="DE" term="%22Heterogeneity%22">Heterogeneity</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The heterogeneity of metal island films electrodeposited on conductive metal oxide modified internal reflection elements is shown to provide a variable attenuated total reflection surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) response. A self-assembled monolayer of a ferrocene-terminated thiol monolayer (FcC11SH) was formed on the gold islands covering a single substrate, which was measured using both a conventional spectrometer and a custom-built horizontal microscope. Cyclic voltammetry and ATR-SEIRAS results reveal that the FcC11SH-modified substrate undergoes a reversible electron transfer and an associated re-orientation of both the ferrocene/ferrocenium headgroup and the hydrocarbon backbone. The magnitude of the absorption signal arising from the redox changes in the monolayer, as well as the IR signature arising from the ingress/egress of the perchlorate counterions, is shown to depend significantly on the size of the infrared beam spot when using a conventional Fourier transform infrared spectrometer. By performing equivalent measurements on a horizontal microscope, the primary cause of the differences in the signal level is found to be the heterogeneity in the density of gold islands on the conductive metal oxide. Graphical Abstract [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Applied Spectroscopy is the property of Sage Publications Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1177/00037028211005817 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 9 StartPage: 1198 Subjects: – SubjectFull: Infrared absorption Type: general – SubjectFull: Attenuated total reflectance Type: general – SubjectFull: Infrared spectroscopy Type: general – SubjectFull: Metallic films Type: general – SubjectFull: Fourier transform spectrometers Type: general – SubjectFull: Heterogeneity Type: general Titles: – TitleFull: Probing Heterogeneity in Attenuated Total Reflection Surface-Enhanced Infrared Absorption Spectroscopy (ATR-SEIRAS) Response with Synchrotron Infrared Microspectroscopy. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Tu, Kaiyang – PersonEntity: Name: NameFull: Morhart, Tyler A. – PersonEntity: Name: NameFull: Read, Stuart T. – PersonEntity: Name: NameFull: Rosendahl, Scott M. – PersonEntity: Name: NameFull: Burgess, Ian J. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 09 Text: Sep2021 Type: published Y: 2021 Identifiers: – Type: issn-print Value: 00037028 Numbering: – Type: volume Value: 75 – Type: issue Value: 9 Titles: – TitleFull: Applied Spectroscopy Type: main |
| ResultId | 1 |
