Gong, K., Ao, J., Li, K., Liu, L., Liu, Y., Xu, G., Wang, T., Cheng, H., Wang, Z., Zhang, X., Wei, H., George, C., Mellouki, A., Herrmann, H., Wang, L., Chen, J., Ji, M., Zhang, L., & Francisco, J. S. (2023). Imaging of pH distribution inside individual microdroplet by stimulated Raman microscopy. Proceedings of the National Academy of Sciences of the United States of America, 120(20), Article e2219588120. https://doi.org/10.1073/pnas.2219588120
Gong, Kedong ; Ao, Jianpeng ; Li, Kejian et al. / Imaging of pH distribution inside individual microdroplet by stimulated Raman microscopy. In: Proceedings of the National Academy of Sciences of the United States of America. 2023 ; Vol. 120, No. 20.
@article{c88629b814174728986e3f15660157f4,
title = "Imaging of pH distribution inside individual microdroplet by stimulated Raman microscopy",
abstract = "Aerosol microdroplets as microreactors for many important atmospheric reactions are ubiquitous in the atmosphere. pH largely regulates the chemical processes within them; however, how pH and chemical species spatially distribute within an atmospheric microdroplet is still under intense debate. The challenge is to measure pH distribution within a tiny volume without affecting the chemical species distribution. We demonstrate a method based on stimulated Raman scattering microscopy to visualize the three-dimensional pH distribution inside single microdroplets of varying sizes. We find that the surface of all microdroplets is more acidic, and a monotonic trend of pH decreasing is observed in the 2.9-μm aerosol microdroplet from center to edge, which is well supported by molecular dynamics simulation. However, bigger cloud microdroplet differs from small aerosol for pH distribution. This size-dependent pH distribution in microdroplets can be related to the surface-to-volume ratio. This work presents noncontact measurement and chemical imaging of pH distribution in microdroplets, filling the gap in our understanding of spatial pH in atmospheric aerosol.",
author = "Kedong Gong and Jianpeng Ao and Kejian Li and Le Liu and Yangyang Liu and Guanjun Xu and Tao Wang and Hanyun Cheng and Zimeng Wang and Xiuhui Zhang and Haoran Wei and Christian George and Abdelwahid Mellouki and Hartmut Herrmann and Lin Wang and Jianmin Chen and Minbiao Ji and Liwu Zhang and Francisco, {Joseph S.}",
note = "Publisher Copyright: Copyright {\textcopyright} 2023 the Author(s). Published by PNAS. This article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).",
year = "2023",
month = may,
day = "16",
doi = "10.1073/pnas.2219588120",
language = "English",
volume = "120",
journal = "Proceedings of the National Academy of Sciences of the United States of America",
issn = "0027-8424",
publisher = "National Academy of Sciences",
number = "20",
}
Gong, K, Ao, J, Li, K, Liu, L, Liu, Y, Xu, G, Wang, T, Cheng, H, Wang, Z, Zhang, X, Wei, H, George, C, Mellouki, A, Herrmann, H, Wang, L, Chen, J, Ji, M, Zhang, L & Francisco, JS 2023, 'Imaging of pH distribution inside individual microdroplet by stimulated Raman microscopy', Proceedings of the National Academy of Sciences of the United States of America, vol. 120, no. 20, e2219588120. https://doi.org/10.1073/pnas.2219588120
Imaging of pH distribution inside individual microdroplet by stimulated Raman microscopy. / Gong, Kedong; Ao, Jianpeng; Li, Kejian et al.
In:
Proceedings of the National Academy of Sciences of the United States of America, Vol. 120, No. 20, e2219588120, 16.05.2023.
Research output: Contribution to journal › Article › peer-review
TY - JOUR
T1 - Imaging of pH distribution inside individual microdroplet by stimulated Raman microscopy
AU - Gong, Kedong
AU - Ao, Jianpeng
AU - Li, Kejian
AU - Liu, Le
AU - Liu, Yangyang
AU - Xu, Guanjun
AU - Wang, Tao
AU - Cheng, Hanyun
AU - Wang, Zimeng
AU - Zhang, Xiuhui
AU - Wei, Haoran
AU - George, Christian
AU - Mellouki, Abdelwahid
AU - Herrmann, Hartmut
AU - Wang, Lin
AU - Chen, Jianmin
AU - Ji, Minbiao
AU - Zhang, Liwu
AU - Francisco, Joseph S.
N1 - Publisher Copyright:
Copyright © 2023 the Author(s). Published by PNAS. This article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).
PY - 2023/5/16
Y1 - 2023/5/16
N2 - Aerosol microdroplets as microreactors for many important atmospheric reactions are ubiquitous in the atmosphere. pH largely regulates the chemical processes within them; however, how pH and chemical species spatially distribute within an atmospheric microdroplet is still under intense debate. The challenge is to measure pH distribution within a tiny volume without affecting the chemical species distribution. We demonstrate a method based on stimulated Raman scattering microscopy to visualize the three-dimensional pH distribution inside single microdroplets of varying sizes. We find that the surface of all microdroplets is more acidic, and a monotonic trend of pH decreasing is observed in the 2.9-μm aerosol microdroplet from center to edge, which is well supported by molecular dynamics simulation. However, bigger cloud microdroplet differs from small aerosol for pH distribution. This size-dependent pH distribution in microdroplets can be related to the surface-to-volume ratio. This work presents noncontact measurement and chemical imaging of pH distribution in microdroplets, filling the gap in our understanding of spatial pH in atmospheric aerosol.
AB - Aerosol microdroplets as microreactors for many important atmospheric reactions are ubiquitous in the atmosphere. pH largely regulates the chemical processes within them; however, how pH and chemical species spatially distribute within an atmospheric microdroplet is still under intense debate. The challenge is to measure pH distribution within a tiny volume without affecting the chemical species distribution. We demonstrate a method based on stimulated Raman scattering microscopy to visualize the three-dimensional pH distribution inside single microdroplets of varying sizes. We find that the surface of all microdroplets is more acidic, and a monotonic trend of pH decreasing is observed in the 2.9-μm aerosol microdroplet from center to edge, which is well supported by molecular dynamics simulation. However, bigger cloud microdroplet differs from small aerosol for pH distribution. This size-dependent pH distribution in microdroplets can be related to the surface-to-volume ratio. This work presents noncontact measurement and chemical imaging of pH distribution in microdroplets, filling the gap in our understanding of spatial pH in atmospheric aerosol.
UR - http://www.scopus.com/inward/record.url?scp=85158159310&partnerID=8YFLogxK
U2 - 10.1073/pnas.2219588120
DO - 10.1073/pnas.2219588120
M3 - Article
C2 - 37155894
AN - SCOPUS:85158159310
SN - 0027-8424
VL - 120
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
IS - 20
M1 - e2219588120
ER -
Gong K, Ao J, Li K, Liu L, Liu Y, Xu G et al. Imaging of pH distribution inside individual microdroplet by stimulated Raman microscopy. Proceedings of the National Academy of Sciences of the United States of America. 2023 May 16;120(20):e2219588120. doi: 10.1073/pnas.2219588120
