负载银纳米立方体的醋酸纤维素纳米纤维及其SERS活性  

Surface-enhanced Raman Scattering from Electrospun Cellulose Acetate Nanofibers Loaded with Aggregated Ag-nanocubes

作　　者：柯岩 陈斌 周宁宁 黄竹林 孟国文 KE Yan;CHEN Bin;ZHOU Ningning;HUANG Zhulin;MENG Guowen(Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Technology,Institute of Solid State Physics,HFIPS,Chinese Academy of Sciences,Hefei 230031,China;School of Chemistry and Materials Science,University of Science and Technology of China,Hefei 230026,China;Guangdong Esquel Textiles Company Limited,Foshan 528500,Guangdong,China)

机构地区：[1]中国科学院合肥物质科学研究院,固体物理研究所,材料物理重点实验室和安徽省纳米材料与技术重点实验室,合肥230031 [2]中国科学技术大学化学与材料科学学院,合肥230026 [3]广东溢达纺织有限公司,广东佛山528500

出　　处：《硅酸盐学报》2021年第2期220-228,共9页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51632009,91963202,21673245);中科院前沿科学重点研究计划(QYZDJ-SSW-SLH046);中科院青年创新促进会;安徽省自然科学基金(1908085QE173)。

摘　　要：报道了一种采用同轴静电纺丝法制备的表面增强Raman散射(SERS)活性衬底,用于微量环境污染物的快速检测。采用醋酸纤维素(CA)/丙酮-二甲基乙酰胺溶液作为前驱液分散银纳米立方体,利用丙酮促进银颗粒适度团聚,采用同轴静电纺丝法制备了大面积银立方体/CA纳米纤维。由于团聚态银纳米立方体之间的等离子体耦合作用,复合薄膜具有优异的SERS活性,是单分散态的银立方体/CA纳米纤维SERS灵敏度的4倍,实现了0.1nmol/L的对巯基苯胺以及10nmol/L的甲基对硫磷农药的SERS检测,SERS信号强度偏差小于12%。Cellulose acetate(CA)nanofibers were embedded with aggregated silver-nanocubes(AgNCs)by a coaxial electrospinning method.AgNCs were dispersed with CA and acetone-dimethylacetamide(DMAc)as a precursor solution,and Ag NCs aggregation was induced with acetone.The nanofibers have a remarkable surface-enhanced Raman scattering(SERS)activity due to the strong plasmon coupling between neighboring AgNCs,which is 4 times of the monomeric-Ag NC/CA sample.As a result,0.1 nmol/L p-aminothiophenol(p-ATP)and 10 nmol/L methyl parathion can be identified,respectively.The nanofibers generate large-area homogeneous SERS signals with a relative signal deviation of less than 12%over 1 mm×1 mm area due to the homogeneous adsorption of target molecules.It is thus indicated that aggregated-AgNCs/CA nanofibers have a promising potential in SERS-based detection of organic pollutants in aqueous solutions.

关 键 词：表面增强拉曼散射 银纳米方块 纳米纤维 静电纺丝 

分 类 号：O433[机械工程—光学工程]