Drastic Enhancement of X-ray Scattering Contrast between Amorphous and Crystalline Phases of Poly(3-hexylthiophene) at the Sulfur K-Edge
Drastic Enhancement of X-ray Scattering Contrast between Amorphous and Crystalline Phases of Poly(3-hexylthiophene) at the Sulfur K-Edge
复制标题
硫 K 边聚（3-己基噻吩）非晶相和晶相之间 X 射线散射对比度的显着增强
DOI：
10.1021/acsmaterialslett.2c00049
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发表时间：
2022
影响因子：
11.4
通讯作者：
Freychet G
中科院分区：
文献类型：
--
作者：
Freychet G
半晶半导体聚合物如聚（3-己基噻吩）表现出影响其光电性能的分层分子顺序。P3HT不仅在分子尺度上具有晶体秩序，在纳米尺度上也表现出规律的晶片秩序。这种晶体和非晶区分层的特点是所谓的“长周期”，可以用小角度x射线散射（SAXS）来测量。非晶相和结晶相之间的弱散射对比通常需要对散装粉末样品进行SAXS测量。在这里，我们表明，通过利用调谐到硫k边的极化温柔x射线，可以产生非晶相和结晶相之间的强烈对比，从而可以很容易地观察到长时间的薄膜P3HT样品。此外，我们还表明，这种对比是由非晶区和结晶区取向顺序的差异产生的。因此，共振柔弱x射线散射不仅是研究半导体聚合物纳米级有序的一种很有前途的技术，而且也适用于其他软物质系统。
Semicrystalline semiconducting polymers such as poly(3-hexylthiophene) exhibit hierarchical molecular ordering that influences their optoelectronic properties. As well as possessing crystalline order on the molecular scale, P3HT also exhibits regular ordering of crystalline lamellae on the nanoscale. This layering of crystalline and amorphous regions is characterized by the so-called “long period” which can be measured with small-angle X-ray scattering (SAXS). The weak scattering contrast between amorphous and crystalline phases generally requires SAXS measurement of bulk powder samples. Here, we show that by utilizing polarized tender X-rays tuned to the sulfur K-edge, strong contrast between amorphous and crystalline phases can be generated allowing for the long period of thin film P3HT samples to be easily observed. Furthermore, we show that the contrast generated results from differences in orientational order in the amorphous and crystalline regions. The use of resonant tender X-ray scattering is thus a promising technique for studying nanoscale ordering not only in semiconducting polymers but also for other soft matter systems.
共轭聚合物在硫 K 边缘的各向异性共振 X 射线衍射。
DOI：
10.1021/acs.jpclett.1c00532
发表时间：
2021
期刊：
The journal of physical chemistry letters
影响因子：
--
作者：
Guillaume Freychet;E. Gann;M. Zhernenkov;C. McNeill
通讯作者：
C. McNeill
NSLS-II 的软物质界面光束线：几何射线追踪与波前传播模拟
DOI：
--
发表时间：
2014
期刊：
影响因子：
--
作者：
M. Zhernenkov;N. Canestrari;O. Chubar;E. DiMasi
通讯作者：
E. DiMasi