结晶学
拉曼光谱
X射线光电子能谱
扫描电子显微镜
微晶
化学
纤维
纤维
晶体结构
光谱学
材料科学
核磁共振
光学
物理
量子力学
复合材料
生物化学
有机化学
作者
Bo Wu,Changdao Mu,Guangzhao Zhang,Wei Lin
出处
期刊:Langmuir
[American Chemical Society]
日期:2009-07-15
卷期号:25 (19): 11905-11910
被引量:90
摘要
We have investigated the effects of Cr3+ on the hierarchical structure of pigskin collagen fibers by use of scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), wide-angle X-ray diffraction (WAXD), confocal laser micro-Raman spectroscopy (CLRS), and circular dichroism (CD). Our results demonstrate that the introduction of Cr3+ leads to the formation of a cluster of 20−40 nm between collagen fibrils, while the unique axial periodic structure (D periodicity) of the fibrils does not change. As the Cr3+ concentration increases, the order of intermolecular lateral packing, crystallite structure within helical chains, and N and C telopeptide regions decrease. The present study reveals that Cr3+ only cross-links with collagen but does not disrupt its triple helical structure.
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