Long-Range Lateral Correlation between Self-Assembled Domains of Fluorocarbon-Hydrocarbon Tetrablocks by Quantitative GISAXS.

Long-Range Lateral Correlation between Self-Assembled Domains of Fluorocarbon-Hydrocarbon Tetrablocks by Quantitative GISAXS.
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通过定量 GISAXS 测定氟碳烃四嵌段自组装域之间的长程横向相关性

DOI:
10.1002/cphc.201800967
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发表时间:
2019
期刊:
Chemphyschem : a European journal of chemical physics and physical chemistry
影响因子:
--
通讯作者:
M. Tanaka
M. Tanaka
中科院分区:
--
文献类型:
--
作者:
W. Abuillan;M. Veschgini;S. Mielke;X. Liu;O. Konovalov;M.P. Krafft;M. Tanaka

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通过对掠入射小角X射线散射(GISAXS)数据的定量分析,确定了氟碳-碳氢化合物四嵌段双(F10 Hm)畴在空气/水界面的结构和横向相关性。通过对形状因子和结构因子的全面计算,可以很好地代表GISAXS的实测信号。形状因子表明di(F10 Hm)畴呈半椭圆形。半椭球的长轴和短轴都随着烃块的伸长而单调增加,这可以用伴随的货车德瓦耳斯相互作用的增加来解释。从GISAXS信号计算的结构因子表明,域采取正交晶格。值得注意的是,横向相关性可以达到比到最近邻居的距离长14倍以上的距离。我们的数据表明,定量GISAXS能够通过微调分子构建块的结构来优化空气/水界面处介观自组装的设计。
The structure and lateral correlation of fluorocarbon‐hydrocarbon tetrablock di(F10Hm) domains at the air/water interface have been determined by quantitative analysis of grazing incidence small‐angle X‐ray scattering (GISAXS) data. The measured GISAXS signals can be well represented by the full calculation of the form and structure factors. The form factor suggests that di(F10Hm) domains take a hemiellipsoid shape. Both major and minor axes of the hemiellipsoids monotonically increased in response to the elongation of the hydrocarbon blocks, which can be explained by the concominant increase in van der Waals interaction. The structure factor calculated from the GISAXS signals suggests that the domains take an orthorhombic lattice. Remarkably, the lateral correlation can reach over a distance that is more than 14 times longer than the distance to the nearest neighbors. Our data suggest that quantitative GISAXS enables the optimal design of mesoscopic self‐assemblies at the air/water interface by fine‐tuning of the structures of molecular building blocks.
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