胶态磁组装光子晶体及其离子强度响应

发布时间：2018-03-06 09:51

本文选题：磁性复合纳米粒子　切入点：胶态磁组装光子晶体　出处：《高等学校化学学报》2017年03期 　论文类型：期刊论文

【摘要】：采用细乳液聚合方法合成了聚合物包覆的磁性复合纳米粒子(MCNPs),通过磁场诱导组装制备得到胶态磁组装光子晶体(CMA-PCs).透射电子显微镜(TEM)和扫描电子显微镜(SEM)表征结果表明,MCNPs具有规整的球形形貌和明显的核壳结构,并且单分散性较好,平均粒径为112 nm,聚合物壳层厚约10 nm.MCNPs在外界磁场的作用下可以快速(1 s)组装形成光子晶体结构.当离子强度在0.03~0.75 mmol/L范围内变化时,CMA-PCs的衍射色呈现从橙红色到紫色的变化,反射波长从607 nm蓝移至434 nm,并且离子强度的响应在10 s内即可达到平衡,表明制得的CMA-PCs可以作为化学传感器应用于离子强度的半定量检测,并且具有简便、快速及裸眼可视化检测的优点.
[Abstract]:The polymer-coated magnetic composite nanoparticles (MCNPsO) were synthesized by microemulsion polymerization. The colloidal magnetically assembled photonic crystals (CMA-PCsN), TEM (TEM) and SEM (SEM) were prepared by magnetic field induced assembly. The results show that MCNPs have regular spherical morphology and obvious core-shell structure. And the monodispersity is good, The average particle size is 112nm.The polymer shell thickness of about 10 nm.MCNPs can be rapidly assembled to form photonic crystal structure under the action of external magnetic field. The diffraction color of CMA-PCs varies from orange-red to purple when the ionic strength varies in the range of 0.03 ~ 0.75 mmol/L. The blue shift of reflection wavelength from 607 nm to 434 nm and the equilibrium of ion intensity response within 10 seconds indicate that the prepared CMA-PCs can be used as a chemical sensor for semi-quantitative determination of ionic strength, and it is simple and convenient. The advantages of fast and naked eye visual detection.
【作者单位】：江南大学化学与材料工程学院食品胶体与生物技术教育部重点实验室;
【基金】：国家自然科学基金(批准号:21405133;21774056) 江苏省普通高校研究生科研创新计划项目(批准号:KYLX16_0786)资助~~
【分类号】：O734

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