Super-Resolution Imaging of Spatial Heterogeneities in Model Thermosensitive Hydrogels with Implications for Their Origins
Super-Resolution Imaging of Spatial Heterogeneities in Model Thermosensitive Hydrogels with Implications for Their Origins
复制标题
热敏水凝胶模型中空间异质性的超分辨率成像及其起源的意义
DOI:
10.1021/acs.macromol.1c00754
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发表时间:
2021
期刊:
影响因子:
5.5
通讯作者:
Ullal, Chaitanya K.
中科院分区:
文献类型:
--
作者:
Kenath, Gopal S.;Karanastasis, Apostolos A.;Ullal, Chaitanya K.
Three-dimensional nanoscale cross-link density variations are an important and incompletely understood morphological aspect of polymer gels. Here, within the context of establishing a deeper understanding of these so-called spatial heterogeneities, we study the spatial distribution of dye-tagged acrylamide monomers in bulk thermosensitive PNIPAM gels using a combination of 3D STED and multicolor confocal microscopy. We identify consistent microstructural trends for the various dye-tagged monomers, thereby expanding the prevailing picture of spatial heterogeneities in thermosensitive gels. Specifically, we provide new morphological insights into the distribution of cross-links, the nature of the interface that defines the polymer-rich regions, and the incidence and connectivity of higher cross-link density regions as a function of quench time and preparation temperature. While phase separation and reactivity rate constant differences have only been studied in isolation as the dominant cause of spatial heterogeneities in thermosensitive gels, our results show that both phenomena play an important role in determining cross-link density distributions.
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影响因子:
13.3
作者:
Apostolos A. Karanastasis;Yongdeng Zhang;G. S. Kenath;M. Lessard;J. Bewersdorf;C. Ullal
通讯作者:
C. Ullal
影响因子:
10.8
作者:
C. Ullal;R. Schmidt;S. Hell;A. Egner
通讯作者:
C. Ullal;R. Schmidt;S. Hell;A. Egner
DOI:
--
发表时间:
1988
期刊:
影响因子:
--
作者:
R. Stein;V. Soni;H. Yang;B. Erman
通讯作者:
B. Erman
影响因子:
5.5
作者:
Sergey Vladimir Panyukov;Y. Rabin
通讯作者:
Sergey Vladimir Panyukov;Y. Rabin
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
S. Kara;O. Okay;Ö. Pekcan
通讯作者:
Ö. Pekcan