Double stacking faults in convectively assembled crystals of colloidal spheres.
Double stacking faults in convectively assembled crystals of colloidal spheres.
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对流聚集的胶体球晶体中的双堆垛层错。
DOI：
10.1021/la900983v
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
A. Petukhov
中科院分区：
文献类型：
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作者：
J. Hilhorst;V. Abramova;A. Sinitskii;N. Sapoletova;K. Napolskii;A. Eliseev;D. Byelov;N. A. Grigoryeva;A. V. Vasilieva;W. Bouwman;K. Kvashnina;A. Snigirev;S. Grigoriev;A. Petukhov
利用微辐射x射线衍射，我们在宏观（0.5 mm）距离上研究了对流组装的胶体光子晶体的晶体结构。通过对x射线衍射的威尔逊理论的改编，我们表明，在这些晶体表面的扫描电子显微镜图像中经常观察到的某些类型的线缺陷实际上是与衬底成70.5度角的平面缺陷。缺陷由两个平行的六边形紧密堆积的平面组成，否则面心立方晶体。我们的测量表明，这些堆叠错误导致至少10%的堆叠无序，必须减少，以制造高质量的胶体光子晶体。
Using microradian X-ray diffraction, we investigated the crystal structure of convectively assembled colloidal photonic crystals over macroscopic (0.5 mm) distances. Through adaptation of Wilson's theory for X-ray diffraction, we show that certain types of line defects that are often observed in scanning electron microscopy images of the surface of these crystals are actually planar defects at 70.5 degrees angles with the substrate. The defects consist of two parallel hexagonal close-packed planes in otherwise face-centered cubic crystals. Our measurements indicate that these stacking faults cause at least 10% of stacking disorder, which has to be reduced to fabricate high-quality colloidal photonic crystals.