Fabrication of SERS-active conjugated copolymers/gold nanoparticles composite films by interface-directed assembly
Fabrication of SERS-active conjugated copolymers/gold nanoparticles composite films by interface-directed assembly
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DOI：
10.1039/c5ra05430c
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发表时间：
2015-04
期刊：
影响因子：
3.9
通讯作者：
Ya-Guang He;Sheng-yu Shi;Na Liu;Yuanyuan Zhu;Yunsheng Ding;Jun Yin;Zongquan Wu
中科院分区：
文献类型：
--
作者：
Ya-Guang He;Sheng-yu Shi;Na Liu;Yuanyuan Zhu;Yunsheng Ding;Jun Yin;Zongquan Wu
利用巯基功能化的聚（4-异氰基苯甲酸-吡啶-4-硫醇）-b-聚（3-己基噻吩）（PPI（-SH）-b-P3 HT）共轭共聚物与金纳米粒子（Au NPs）在氯仿/水界面的界面定向组装，制备了一种新型的功能复合膜.通过氢键诱导的胶束化和随后的硫醇-二硫键交换反应合成了PPI（-SH）-b-P3 HT共聚物。透射电子显微镜（TEM）和原子力显微镜（AFM）观察表明，薄膜是均匀的大规模和完整的表面形态不受Au纳米粒子的浓度。有趣的是，薄膜衬底不仅表现出强烈的Au NPs浓度依赖的表面增强拉曼散射（Sers）活性，但也允许检测模型分子，IR-792高氯酸盐（IR-792），在Sers测量。这一概念验证表明，界面组装路线在整合有机聚合物和无机纳米颗粒的性质方面是有效的，并可用于进一步的应用。
We report a new type of functional composite films by taking advantage of the interface-directed assembly between thiol groups functionalized poly(4-isocyano benzoic acid⋯pyridine-4-thiol)-b-poly(3-hexylthiophene) (PPI(–SH)-b-P3HT) conjugated copolymers and gold nanoparticles (Au NPs) at the chloroform/water interface. The PPI(–SH)-b-P3HT copolymers were synthesized through hydrogen bonding induced micellization and subsequent thiol–disulfide exchange reaction. Transmission electron microscopic (TEM) and atomic force microscopy (AFM) observations showed the film was uniform on a large scale and the integrity of surface morphology was not affected by the Au NPs concentration. Interestingly, the film substrate not only exhibited a strongly Au NPs concentration dependent surface-enhanced Raman scattering (SERS) activity but also allowed detection of model molecule, IR-792 perchlorate (IR-792), in the SERS measurement. This proof-of-concept suggests the interfacial assembly route is effective in integrating the properties of organic polymers and inorganic nanoparticles, and for further application.