Imaging chemical kinetics of radical polymerization with an ultrafast coherent Raman microscope

Numerous mechanisms have been proposed for polymerization to provide qualitative and quantitative prediction of how monomers spatially and temporally arrange into the polymeric chains. However, less is known about this process at the molecular level because the ultrafast chemical reaction is inacces...

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Main Authors: Li, Haozheng, Cheng, Yong, Tang, Huajun, Bi, Yali, Chen, Yage, Yang, Guang, Guo, Shoujing, Tian, Sidan, Liao, Jiangshan, Lv, Xiaohua, Zeng, Shaoqun, Zhu, Mingqiang, Xu, Chenjie, Cheng, Ji-Xin, Wang, Ping
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/145575
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1455752023-12-29T06:51:10Z Imaging chemical kinetics of radical polymerization with an ultrafast coherent Raman microscope Li, Haozheng Cheng, Yong Tang, Huajun Bi, Yali Chen, Yage Yang, Guang Guo, Shoujing Tian, Sidan Liao, Jiangshan Lv, Xiaohua Zeng, Shaoqun Zhu, Mingqiang Xu, Chenjie Cheng, Ji-Xin Wang, Ping School of Chemical and Biomedical Engineering Engineering::Bioengineering Chemical Kinetics Polymer Synthesis Numerous mechanisms have been proposed for polymerization to provide qualitative and quantitative prediction of how monomers spatially and temporally arrange into the polymeric chains. However, less is known about this process at the molecular level because the ultrafast chemical reaction is inaccessible for any form of microscope so far. Here, to address this unmet challenge, a stimulated Raman scattering microscope based on collinear multiple beams (COMB‐SRS) is demonstrated, which allows label‐free molecular imaging of polymer synthesis in action at speed of 2000 frames per second. The field of view of the developed 2 kHz SRS microscope is 30 × 28 µm2 with 50 × 46 pixels and 7 µs dwell time. By catching up the speed of chemical reaction, COMB‐SRS is able to quantitatively visualize the ultrafast dynamics of molecular vibrations with submicron spatial resolution and sub‐millisecond temporal resolution. The propagating polymer waves driven by reaction rate and persistent UV initiation are observed in situ. This methodology is expected to permit the development of novel functional polymers, controllable photoresists, 3D printing, and other new polymerization technologies. Published version 2020-12-29T03:22:26Z 2020-12-29T03:22:26Z 2020 Journal Article Li, H., Cheng, Y., Tang, H., Bi, Y., Chen, Y., Yang, G., . . . Wang, P. (2020). Imaging chemical kinetics of radical polymerization with an ultrafast coherent Raman microscope. Advanced Science, 7(10), 1903644-. doi:10.1002/advs.201903644 2198-3844 https://hdl.handle.net/10356/145575 10.1002/advs.201903644 32440482 10 7 en Advanced Science © 2020 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Bioengineering
Chemical Kinetics
Polymer Synthesis
spellingShingle Engineering::Bioengineering
Chemical Kinetics
Polymer Synthesis
Li, Haozheng
Cheng, Yong
Tang, Huajun
Bi, Yali
Chen, Yage
Yang, Guang
Guo, Shoujing
Tian, Sidan
Liao, Jiangshan
Lv, Xiaohua
Zeng, Shaoqun
Zhu, Mingqiang
Xu, Chenjie
Cheng, Ji-Xin
Wang, Ping
Imaging chemical kinetics of radical polymerization with an ultrafast coherent Raman microscope
description Numerous mechanisms have been proposed for polymerization to provide qualitative and quantitative prediction of how monomers spatially and temporally arrange into the polymeric chains. However, less is known about this process at the molecular level because the ultrafast chemical reaction is inaccessible for any form of microscope so far. Here, to address this unmet challenge, a stimulated Raman scattering microscope based on collinear multiple beams (COMB‐SRS) is demonstrated, which allows label‐free molecular imaging of polymer synthesis in action at speed of 2000 frames per second. The field of view of the developed 2 kHz SRS microscope is 30 × 28 µm2 with 50 × 46 pixels and 7 µs dwell time. By catching up the speed of chemical reaction, COMB‐SRS is able to quantitatively visualize the ultrafast dynamics of molecular vibrations with submicron spatial resolution and sub‐millisecond temporal resolution. The propagating polymer waves driven by reaction rate and persistent UV initiation are observed in situ. This methodology is expected to permit the development of novel functional polymers, controllable photoresists, 3D printing, and other new polymerization technologies.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Li, Haozheng
Cheng, Yong
Tang, Huajun
Bi, Yali
Chen, Yage
Yang, Guang
Guo, Shoujing
Tian, Sidan
Liao, Jiangshan
Lv, Xiaohua
Zeng, Shaoqun
Zhu, Mingqiang
Xu, Chenjie
Cheng, Ji-Xin
Wang, Ping
format Article
author Li, Haozheng
Cheng, Yong
Tang, Huajun
Bi, Yali
Chen, Yage
Yang, Guang
Guo, Shoujing
Tian, Sidan
Liao, Jiangshan
Lv, Xiaohua
Zeng, Shaoqun
Zhu, Mingqiang
Xu, Chenjie
Cheng, Ji-Xin
Wang, Ping
author_sort Li, Haozheng
title Imaging chemical kinetics of radical polymerization with an ultrafast coherent Raman microscope
title_short Imaging chemical kinetics of radical polymerization with an ultrafast coherent Raman microscope
title_full Imaging chemical kinetics of radical polymerization with an ultrafast coherent Raman microscope
title_fullStr Imaging chemical kinetics of radical polymerization with an ultrafast coherent Raman microscope
title_full_unstemmed Imaging chemical kinetics of radical polymerization with an ultrafast coherent Raman microscope
title_sort imaging chemical kinetics of radical polymerization with an ultrafast coherent raman microscope
publishDate 2020
url https://hdl.handle.net/10356/145575
_version_ 1787136709046042624