Single-particle Raman spectroscopy for studying physical and chemical processes of atmospheric particles

Liang, Zhancong; Chu, Yangxi; Gen, Masao; Chan, Chak K.

doi:https://doi.org/10.5194/acp-22-3017-2022

Articles | Volume 22, issue 5

https://doi.org/10.5194/acp-22-3017-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-22-3017-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 5

Review article

|

07 Mar 2022

Review article |

| 07 Mar 2022

Single-particle Raman spectroscopy for studying physical and chemical processes of atmospheric particles

Zhancong Liang, Yangxi Chu, Masao Gen, and Chak K. Chan

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Final revised paper (published on 07 Mar 2022)
Preprint (discussion started on 26 May 2021)

Interactive discussion

Status: closed

RC1:
'Comment on acp-2021-423', Anonymous Referee #1, 17 Nov 2021

Liang and colleagues have written an excellent primer on Raman spectroscopy and its application to the study of atmospherically relevant single-particles. The work is comprehensive and very well written and is an excellent contribution to the literature. My. Comments below are all quite minor and can be readily corrected during a through read-through of the manuscript.

Line 13. Replace ’state’ with ’states’.

Lines 49-51. References should be provided for the different approaches mentioned within this sentence and/or in the paragraph that follows.

Line 60. Is the ’smog chamber’ mentioned here the same thing as the ‘chamber of suspending particles’ mentioned on line 50? The terminology could be tightened.

Line 84. Replace ‘process’ with ‘processing’.

Line 101. Define the acronym HULIS

Line 114. It is unclear why the authors mention pharmaceuticals here. There are numerous non-atmospheric applications of Raman that could be mentioned. I’d suggest eliminating the parenthetical expression.

Line 143. Replaced ‘coupling’ with ‘coupled’

Line 164. The term ‘Bessel beam’ has not previously been defined.

Line 203. References should be included for MDRs and WGMs.

Lines 194-205. The reference formattting in this section is not consistent with the other parts of the manuscript. Reference numbers are given instead of Author, Date format.

Line 280. Replace ‘other’ with ‘differential’ Raman characteristics.

Line 384. Add ’the’ and ‘equation’ prior to and following 'Hendeerson-Hasselbalth (H-H)’, respectively.

Line 402. Replace ‘matrixes’ with ‘matrices’.

Citation: https://doi.org/10.5194/acp-2021-423-RC1
- AC1: 'Reply on RC1', Zhancong Liang, 13 Dec 2021
  
  The comment was uploaded in the form of a supplement: https://acp.copernicus.org/preprints/acp-2021-423/acp-2021-423-AC1-supplement.pdf
  
  Citation: https://doi.org/10.5194/acp-2021-423-AC1
RC2:
'Comment on acp-2021-423', Anonymous Referee #2, 24 Nov 2021

My main issue with this review article is that ignores a lot of recent work in the field and focuses on older papers, e.g.:

Section 2.1.1.: Has there been no EDB work since that 1980 Ray and Davis paper?

Section 2.1.2.: Mostly references from 10 years ago. Tons of Raman work involving optical traps since then. No mention of cavity enhanced Raman scattering.

Section 2.2: Perhaps Refs 39, 40 are somewhat recent WGM references? Can't tell as they don't appear in the references section as they are not in the ACP style. As it stands, this section is very poor.

Section 3.1: Mostly references from 10+ years ago

Section 3.2: Mostly references from 10+ years ago

Section 3.4: There has been so much work on LLPS in the last 5 years that is not referenced here (and a lot of the papers referenced here have nothing to do with single particle Raman spectroscopy).

Citation: https://doi.org/10.5194/acp-2021-423-RC2
- AC2: 'Reply on RC2', Zhancong Liang, 13 Dec 2021
  
  The comment was uploaded in the form of a supplement: https://acp.copernicus.org/preprints/acp-2021-423/acp-2021-423-AC2-supplement.pdf
  
  Citation: https://doi.org/10.5194/acp-2021-423-AC2

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload

AR by Zhancong Liang on behalf of the Authors (13 Dec 2021) Author's response Author's tracked changes Manuscript

ED: Publish as is (17 Jan 2022) by Jason Surratt

AR by Zhancong Liang on behalf of the Authors (19 Jan 2022)

Short summary

The properties and fate of individual airborne particles can be significantly different, leading to distinct environmental impacts (e.g., climate and human health). While many instruments only analyze an ensemble of these particles, single-particle Raman spectroscopy enables unambiguous characterization of individual particles. This paper comprehensively reviews the applications of such a technique in studying atmospheric particles, especially for their physicochemical processing.