胶态磁组装光子晶体及其离子强度响应

doi:10.7503/cjcu20160486

高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (3): 479.doi: 10.7503/cjcu20160486

胶态磁组装光子晶体及其离子强度响应

由爱梅, 曹玉华(), 曹光群

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, 无锡 214122

收稿日期:2016-07-08 出版日期:2017-03-10 发布日期:2017-02-24
作者简介:联系人简介: 曹玉华, 女, 博士, 教授, 主要从事分析化学方面的研究. E-mail: yuhuacao64@gmail.com
基金资助:
国家自然科学基金(批准号: 21405133, 21774056)和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.

Colloidal Magnetically Assembled Photonic Crystals and Ionic Strength Sensing^†

YOU Aimei, CAO Yuhua^*(), CAO Guangqun

The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China

Received:2016-07-08 Online:2017-03-10 Published:2017-02-24
Contact: CAO Yuhua E-mail:yuhuacao64@gmail.com
Supported by:
† Supported by the National Natural Science Foundation of China(Nos.21405133, 21774056) and the Postgraduate Innovation Project of Jiangsu Province, China(No.KYLX16_0786).

摘要/Abstract

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.

关键词: 磁性复合纳米粒子, 胶态磁组装光子晶体, 离子强度

Abstract:

Magnetic composite nanoparticles(MCNPs) with magnetic core and polymers shell were prepared via miniemulsion polymerization technique. As the assembling blocks, MCNPs were constructed into colloidal magnetically assembled photonic crystals(CMA-PCs) with the assistance of a magnetic field. The characterization results of TEM and SEM show that MCNPs have uniform spherical morphology, a distinct core-shell structure and good monodispersity. The average diameter of MCNPs was 112 nm, the shell of MCNPs was about 10 nm in thickness. The diffraction color of CMA-PCs changed from orange to purple, the reflection wavelength shifted from 607 nm to 434 nm as the ionic strength increased from 0.03 mmol/L to 0.75 mmol/L, with response time less than 10 s. As a chemical sensor, CMA-PCs have the advantages of convenient, sensitive and naked eye visual detection, and could be applied in the semi-quantitative detection of ionic strength.

Key words: Magnetic composite nanoparticles, Colloidal magnetically assembled photonic crystals, Ionic strength

中图分类号:

O648

TrendMD:

由爱梅, 曹玉华, 曹光群. 胶态磁组装光子晶体及其离子强度响应. 高等学校化学学报, 2017, 38(3): 479.

YOU Aimei, CAO Yuhua, CAO Guangqun. Colloidal Magnetically Assembled Photonic Crystals and Ionic Strength Sensing^†. Chem. J. Chinese Universities, 2017, 38(3): 479.

图/表 4

Fig.1 TEM image(A), SEM image(B), FTIR spectrum(C) and magnetization curve(D) of MCNPs

Fig.2 Digital photos of CMA-PCs assembled under different magnet intensities (A)—(E) The distances between CMA-PCs and NdFeB magnet are 0—1 cm from left to right.

Fig.3 Digital photos of the typical diffraction colors(A—E) and reflection spectra of CMA-PCs with adding 0.01 mmol/L NaCl solution(F) (A) Blank MCNPs; (B) blank CMA-PCs; (C) 6 μL NaCl solution; (D) 54 μL NaCl solution; (E) 150 μL NaCl solution.

Fig.4 Electrolytes-induced Δλ of CMA-PCs vs. the IS of different electrolytes

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胶态磁组装光子晶体及其离子强度响应

Colloidal Magnetically Assembled Photonic Crystals and Ionic Strength Sensing^†

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胶态磁组装光子晶体及其离子强度响应

Colloidal Magnetically Assembled Photonic Crystals and Ionic Strength Sensing†

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Colloidal Magnetically Assembled Photonic Crystals and Ionic Strength Sensing^†