箴言
----------------------------------------------
-----------------------------------------------
在科学上没有平坦的大道,只有那些不畏艰险沿着陡峭山路攀登的人,才有希望达到光辉的顶点。
----马克思
-----------------------------------------------
合作研究
------------------------------------------
请有兴趣的研究组联系我们。欢迎任何形式的合作，尤其是在自组装、水凝胶以及生物医药等方向的合作。
------------------------------------------
请有兴趣的研究组联系我们。欢迎任何形式的合作，尤其是在自组装、水凝胶以及生物医药等方向的合作。
------------------------------------------
研究成果
37. Exactly Defined Half-Stemmed Polymer Lamellar Crystals with Precisely Controlled Defects’ Locations. J. Phys. Chem. Lett., 2013, 4, 2356-2360
发布时间:2016-04-27
Dong, X.-H.; Van Horn, R.; Chen, Z.; Ni, B.; Yu, X.; Wurm, A.; Schick, C.; Lotz, B.; Zhang, W.-B.;* Cheng, S. Z. D.* Exactly Defined Half-Stemmed Polymer Lamellar Crystals with Precisely Controlled Defects’ Locations. J. Phys. Chem. Lett., 2013, 4, 2356-2360. [Link] [PDF]
Abstract
We describe highly unconventional situations in which the polymer chain ends remain trapped in and are located in the middle of the lamellar crystal core as defects. Such structures are observed in giant molecular shape amphiphiles constructed by a polyhedral silsesquioxane (POSS) nanoparticle tethered with a poly(ethylene oxide) (PEO) tail. The cross-sectional area of the POSS located on the PEO lamellar surfaces imposes that the crystalline, chain-folded PEO tails generate a surface area that is at least comparable to the POSS requirements. Metastable PEO crystal structures with 1.5, 2, and 2.5 stem numbers have been observed with different thermodynamic stabilities.