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Polarization effects in Raman spectroscopy of light-absorbing carbon

Le, Kim Cuong LU orcid ; Henriksson, Jonatan and Bengtsson, Per-Erik LU orcid (2021) In Journal of Raman Spectroscopy 52(6). p.1115-1122
Abstract
Raman spectroscopy is widely used for characterization of carbon-based mate- rials including light-absorbing carbonaceous (LAC) matter. However, informa- tion on polarization properties of these materials are generally lacking, and often the polarization characteristics of experiments are not presented in the literature thereby giving uncertainty to presented data. In this work, the polari- zation properties of various LACs are studied using Raman spectroscopy. The Raman spectra have been compared while varying the relative polarization, particularly the relative direction of the electric field between the incident light and the detected scattered light. Specifically, the intensity ratio between the D1 and G peaks... (More)
Raman spectroscopy is widely used for characterization of carbon-based mate- rials including light-absorbing carbonaceous (LAC) matter. However, informa- tion on polarization properties of these materials are generally lacking, and often the polarization characteristics of experiments are not presented in the literature thereby giving uncertainty to presented data. In this work, the polari- zation properties of various LACs are studied using Raman spectroscopy. The Raman spectra have been compared while varying the relative polarization, particularly the relative direction of the electric field between the incident light and the detected scattered light. Specifically, the intensity ratio between the D1 and G peaks (ID1/IG) was analyzed in parallel and perpendicular polarization configurations for samples taken from a sooting flame, in the exhaust of a soot generator and carbon blacks. In this work, the parallel and perpendicular polarization configurations mean that the polarization of the detected scattered light is parallel and orthogonal, respectively, to the linearly polarized incident light. It was found that the (ID1/IG) ratio decreased in the more ordered carbo- naceous structures when changing the polarization configuration from parallel to perpendicular. Additionally, based on the depolarization ratios (Dp < 0.75), the prominent Raman peaks of LAC were found to originate from totally sym- metric vibrations. For the G peak, the depolarization ratio was measured to be in the range 0.46–0.56 for all LAC materials. (Less)
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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Light absorbing carbon (LAC), soot, carbon black, Polarization
in
Journal of Raman Spectroscopy
volume
52
issue
6
pages
8 pages
publisher
John Wiley & Sons Inc.
external identifiers
  • scopus:85105116407
ISSN
1097-4555
DOI
10.1002/jrs.6107
language
English
LU publication?
yes
id
4a2eed4d-fe85-4f55-b913-adc5addda6d6
date added to LUP
2021-05-05 22:11:20
date last changed
2025-04-04 14:14:24
@article{4a2eed4d-fe85-4f55-b913-adc5addda6d6,
  abstract     = {{Raman spectroscopy is widely used for characterization of carbon-based mate- rials including light-absorbing carbonaceous (LAC) matter. However, informa- tion on polarization properties of these materials are generally lacking, and often the polarization characteristics of experiments are not presented in the literature thereby giving uncertainty to presented data. In this work, the polari- zation properties of various LACs are studied using Raman spectroscopy. The Raman spectra have been compared while varying the relative polarization, particularly the relative direction of the electric field between the incident light and the detected scattered light. Specifically, the intensity ratio between the <i>D</i><sub>1</sub> and <i>G</i> peaks <i>(I<sub>D</sub></i><sub>1</sub><i>/I<sub>G</sub>)</i> was analyzed in parallel and perpendicular polarization configurations for samples taken from a sooting flame, in the exhaust of a soot generator and carbon blacks. In this work, the parallel and perpendicular polarization configurations mean that the polarization of the detected scattered light is parallel and orthogonal, respectively, to the linearly polarized incident light. It was found that the <i>(I<sub>D1</sub>/I<sub>G</sub>)</i> ratio decreased in the more ordered carbo- naceous structures when changing the polarization configuration from parallel to perpendicular. Additionally, based on the depolarization ratios (<i>D<sub>p</sub></i> &lt; 0.75), the prominent Raman peaks of LAC were found to originate from totally sym- metric vibrations. For the <i>G</i> peak, the depolarization ratio was measured to be in the range 0.46–0.56 for all LAC materials.}},
  author       = {{Le, Kim Cuong and Henriksson, Jonatan and Bengtsson, Per-Erik}},
  issn         = {{1097-4555}},
  keywords     = {{Light absorbing carbon (LAC); soot; carbon black; Polarization}},
  language     = {{eng}},
  month        = {{06}},
  number       = {{6}},
  pages        = {{1115--1122}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{Journal of Raman Spectroscopy}},
  title        = {{Polarization effects in Raman spectroscopy of light-absorbing carbon}},
  url          = {{http://dx.doi.org/10.1002/jrs.6107}},
  doi          = {{10.1002/jrs.6107}},
  volume       = {{52}},
  year         = {{2021}},
}