金包覆聚酰胺66纳米纤维串晶的SERS基底  

SERS substrate of gold-coated polyamide 66 nanofibers shish-kebabs

作　　者：汪志华 张海宝 林永兴[2] WANG Zhihua;ZHANG Haibao;LIN Yongxing(Institutes of Physical Science and Information Technology,Anhui University,Hefei 230601,China;Key Lab of Photovoltaic and Energy Conservation Materials,Institute of Solid State Physics,Hefei Institutes of Physical Science,Chinese Academy of Science,Hefei 230031,China)

机构地区：[1]安徽大学物质科学与信息技术研究院,安徽合肥230601 [2]中国科学院合肥物质科学研究院固体物理研究所中国科学院光伏与节能材料重点实验室,安徽合肥230031

出　　处：《南通大学学报（自然科学版）》2022年第1期58-68,共11页Journal of Nantong University(Natural Science Edition)　

基　　金：国家重点研究发展计划项目(2017YFB0406200);国家自然科学基金面上项目(21875257)。

摘　　要：通过静电纺丝和溶液孵育处理构筑了聚酰胺66(polyamide 66,PA66)片晶间隔生长在聚酰胺66纳米纤维(polyamide 66 nanofibers,PA66 NFs)上形成的三维分级纳米结构,即同质聚酰胺66纳米纤维串晶(polyamide 66nanofibers shish-kebabs,PA66 NFSKs)结构,并对影响其形貌和结晶情况的因素进行分析。结果 表明:PA66 NFSKs的形貌与孵育溶液的浓度密切相关,孵育溶液浓度越大,PA66 NFSKs中的kebab片晶的尺寸越大;PA66 NFSKs形成时不会改变PA66 NFs原有的晶型,长出的kebab片晶为α晶型结构。将制得的PA66 NFSKs用作模板,利用离子溅射技术在其上沉积一层金纳米颗粒(Au nanoparticles,Au NPs)制成新型三维表面增强拉曼光谱(surface-enhanced Raman spectroscopy,SERS)基底——Au NPs@PA66 NFSKs。探究了离子溅射处理时长和模板微观形貌对Au NPs@PA66 NFSKs拉曼信号增强能力的影响。优化条件下制得的SERS基底Au NPs@PA66 NFSKs0.01%-9 min对罗丹明6G(rhodamine 6G,R6G)的检测灵敏度高达10-14mol/L,同时表现出良好的信号再现性。A three-dimensional nanostructure consisting of polyamide 66 nanofibers(PA66 NFs) and polyamide 66(PA66) crystal lamellae growing at intervals on it, the homogenous polyamide 66 nanofibers shish-kebabs(PA66 NFSKs) structure, is constructed by electrospinning and solution incubation. The factors affecting it morphology and crystallization are analyzed. The findings show that the morphology of PA66 NFSKs is closely related to the concentration of the incubation solution. The greater the concentration of the incubation solution is, the larger the size of the kebab crystal lamellae of PA66 NFSKs is. The formation of PA66 NFSKs will not change the original crystal form of PA66NFs, the grown kebab crystal lamellae are in α crystal form. A layer of Au nanoparticles(Au NPs) are deposited on PA66 NFSKs template by ion sputtering technology, in this way, a novel three-dimensional surface-enhanced Raman spectroscopy(SERS) substrate-Au NPs@PA66 NFSKs is prepared. The influence of the ion sputtering time and the microstructure of the template on the Raman signal enhancement ability of the SERS substrate are explored. The SERS substrate prepared under optimized conditions, Au NPs@PA66 NFSKs0.01%-9 min, has a high detection sensitivity of10-14mol/L for rhodamine 6G(R6G) and shows good signal reproducibility.

关 键 词：纳米纤维串晶 表面增强拉曼光谱 聚酰胺66 罗丹明6G 金纳米颗粒 

分 类 号：O657.37[理学—分析化学] TQ342.12[理学—化学]