Detecting the pH-dependent liquid-liquid phase separation of single levitated aerosol microdroplets via laser tweezers-Raman spectroscopy
Ambient atmospheric aerosol particles comprised of various inorganic and organic substances ubiquitously undergo phase transition, such as efflorescence, amorphization, and especially liquid-liquid phase separation (LLPS). Resultant changes of physicochemical properties in aerosols then deeply affec...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-08-01
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| Series: | Frontiers in Physics |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fphy.2022.969921/full |
| _version_ | 1811214672633790464 |
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| author | Yu-Kai Tong Xiangxinyue Meng Bo Zhou Bo Zhou Rui Sun Zhijun Wu Min Hu Anpei Ye |
| author_facet | Yu-Kai Tong Xiangxinyue Meng Bo Zhou Bo Zhou Rui Sun Zhijun Wu Min Hu Anpei Ye |
| author_sort | Yu-Kai Tong |
| collection | DOAJ |
| description | Ambient atmospheric aerosol particles comprised of various inorganic and organic substances ubiquitously undergo phase transition, such as efflorescence, amorphization, and especially liquid-liquid phase separation (LLPS). Resultant changes of physicochemical properties in aerosols then deeply affect the climate system. However, finely detecting these processes occurring in single aerosol particles, especially under the acidic condition of real atmospheric environment, remains a challenge. In this work, we investigated the pH-dependent phase separation in single levitated microdroplets using a self-developed laser tweezers Raman spectroscopy (LTRS) system. The dynamic process of LLPS in laser-trapped droplets over the course of humidity cycles was detected with the time-resolved cavity-enhanced Raman spectra. These measurements provide the first comprehensive account of the pH-dependent LLPS in single levitated aerosol microdroplets and bring possible implications on phase separation in actual atmospheric particles. |
| first_indexed | 2024-04-12T06:08:53Z |
| format | Article |
| id | doaj.art-e72bb2f3285d4612a076a098ab7deda4 |
| institution | Directory Open Access Journal |
| issn | 2296-424X |
| language | English |
| last_indexed | 2024-04-12T06:08:53Z |
| publishDate | 2022-08-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physics |
| spelling | doaj.art-e72bb2f3285d4612a076a098ab7deda42022-12-22T03:44:47ZengFrontiers Media S.A.Frontiers in Physics2296-424X2022-08-011010.3389/fphy.2022.969921969921Detecting the pH-dependent liquid-liquid phase separation of single levitated aerosol microdroplets via laser tweezers-Raman spectroscopyYu-Kai Tong0Xiangxinyue Meng1Bo Zhou2Bo Zhou3Rui Sun4Zhijun Wu5Min Hu6Anpei Ye7Key Laboratory for the Physics and Chemistry of Nanodevices, School of Electronics, Peking University, Beijing, ChinaState Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, ChinaKey Laboratory for the Physics and Chemistry of Nanodevices, School of Electronics, Peking University, Beijing, ChinaSchool of Science, Beijing University of Posts and Telecommunications, Beijing, ChinaKey Laboratory for the Physics and Chemistry of Nanodevices, School of Electronics, Peking University, Beijing, ChinaState Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, ChinaState Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, ChinaKey Laboratory for the Physics and Chemistry of Nanodevices, School of Electronics, Peking University, Beijing, ChinaAmbient atmospheric aerosol particles comprised of various inorganic and organic substances ubiquitously undergo phase transition, such as efflorescence, amorphization, and especially liquid-liquid phase separation (LLPS). Resultant changes of physicochemical properties in aerosols then deeply affect the climate system. However, finely detecting these processes occurring in single aerosol particles, especially under the acidic condition of real atmospheric environment, remains a challenge. In this work, we investigated the pH-dependent phase separation in single levitated microdroplets using a self-developed laser tweezers Raman spectroscopy (LTRS) system. The dynamic process of LLPS in laser-trapped droplets over the course of humidity cycles was detected with the time-resolved cavity-enhanced Raman spectra. These measurements provide the first comprehensive account of the pH-dependent LLPS in single levitated aerosol microdroplets and bring possible implications on phase separation in actual atmospheric particles.https://www.frontiersin.org/articles/10.3389/fphy.2022.969921/fullsingle aerosolpHliquid-liquid phase separationRaman spectroscopylaser tweezers |
| spellingShingle | Yu-Kai Tong Xiangxinyue Meng Bo Zhou Bo Zhou Rui Sun Zhijun Wu Min Hu Anpei Ye Detecting the pH-dependent liquid-liquid phase separation of single levitated aerosol microdroplets via laser tweezers-Raman spectroscopy Frontiers in Physics single aerosol pH liquid-liquid phase separation Raman spectroscopy laser tweezers |
| title | Detecting the pH-dependent liquid-liquid phase separation of single levitated aerosol microdroplets via laser tweezers-Raman spectroscopy |
| title_full | Detecting the pH-dependent liquid-liquid phase separation of single levitated aerosol microdroplets via laser tweezers-Raman spectroscopy |
| title_fullStr | Detecting the pH-dependent liquid-liquid phase separation of single levitated aerosol microdroplets via laser tweezers-Raman spectroscopy |
| title_full_unstemmed | Detecting the pH-dependent liquid-liquid phase separation of single levitated aerosol microdroplets via laser tweezers-Raman spectroscopy |
| title_short | Detecting the pH-dependent liquid-liquid phase separation of single levitated aerosol microdroplets via laser tweezers-Raman spectroscopy |
| title_sort | detecting the ph dependent liquid liquid phase separation of single levitated aerosol microdroplets via laser tweezers raman spectroscopy |
| topic | single aerosol pH liquid-liquid phase separation Raman spectroscopy laser tweezers |
| url | https://www.frontiersin.org/articles/10.3389/fphy.2022.969921/full |
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