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首页> 美国卫生研究院文献>Springer Open Choice >Preparation and optical properties of novel bioactive photonic crystals obtained from core-shell poly(styrene/α-tert-butoxy-ω-vinylbenzyl-polyglycidol) microspheres
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Preparation and optical properties of novel bioactive photonic crystals obtained from core-shell poly(styrene/α-tert-butoxy-ω-vinylbenzyl-polyglycidol) microspheres

机译：核-壳聚（苯乙烯/α-叔丁氧基-ω-乙烯基苄基-聚缩水甘油）微球获得的新型生物活性光子晶体的制备和光学性质

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Optical properties of polymer microspheres with polystyrene cores and polyglycidol-enriched shells poly(styrene/α-tert-butoxy-ω-vinylbenzyl-polyglycidol) (P(S/PGL) particles with number average diameters Dn determined by scanning electron microscopy equal 237 and 271 nm), were studied before and after immobilization of ovalbumin. The particles were synthesized by emulsifier-free emulsion copolymerization of styrene and polyglycidol macromonomer (poly(styrene/α-tert-butoxy-ω-vinylbenzyl-polyglycidol)) initiated with potassium persulfate. Molar fraction of polyglycidol units in the interfacial layer of the microspheres determined by XPS was equal 42.6 and 34.0%, for the particles with Dn equal 137 and 271 nm, respectively. Colloidal crystals from the aforementioned particles were prepared by deposition of particle suspensions on the glass slides and subsequent evaporation of water. It was found that optical properties of colloidal crystals from the P(S/PGL) microspheres strongly depend on modification of their interfacial layer by covalent immobilization of ovalbumin. The coating of particles with ovalbumin resulted in decreasing their refractive index from 1.58 to 1.52.
机译：带有聚苯乙烯核和富含缩水甘油的壳的聚合物微球的光学性能聚（苯乙烯/α-叔丁氧基-ω-乙烯基苄基-聚缩水甘油）（P（S / PGL）粒子）的数均直径Dn通过扫描电子显微镜确定为237， 271 nm），在固定卵清蛋白前后进行了研究。通过由过硫酸钾引发的苯乙烯和聚缩水甘油大分子单体（聚（苯乙烯/α-叔丁氧基-ω-乙烯基苄基-聚缩水甘油））的无乳化剂乳液共聚合成颗粒。 XPS测定的微球界面层中聚缩水甘油单元的摩尔分数分别等于Dn等于137和271 nm的颗粒的42.6和34.0％。通过将颗粒悬浮液沉积在载玻片上并随后蒸发水来制备来自上述颗粒的胶体晶体。已经发现，来自P（S / PGL）微球的胶体晶体的光学性质在很大程度上取决于通过卵白蛋白的共价固定来修饰其界面层。用卵清蛋白包被的颗粒导致其折射率从1.58降低到1.52。

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