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首页> 外文期刊>Nanotechnology >Gold nanoparticles-decorated electrospun poly(N-vinyl-2-pyrrolidone) nanofibers with tunable size and coverage density for nanomolar detection of single and binary component dyes by surface-enhanced raman spectroscopy
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Gold nanoparticles-decorated electrospun poly(N-vinyl-2-pyrrolidone) nanofibers with tunable size and coverage density for nanomolar detection of single and binary component dyes by surface-enhanced raman spectroscopy

机译：金纳米颗粒装饰的电纺聚（N-乙烯基-2-吡咯烷酮）纳米纤维，具有可调谐尺寸和覆盖密度，用于通过表面增强拉曼光谱检查单组分和二元组分染料的纳米摩尔检测

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摘要

The application of the electrospun nanomaterials to surface-enhanced Raman spectroscopy (SERS) is a rapidly evolving field which holds potential for future developments in the generation of portable plasmonic-based detection platforms. In this study, a simple approach to fabricate electrospun poly(N-vinylpyrrolidone) (PVP) mats decorated with gold nanoparticles (AuNPs) by combining electrospinning and calcination was presented. AuNPs were decorated on the fiber mat surface through electrostatic interactions between positively charged aminosilane groups and negatively charged AuNPs. The size and coverage density of AuNPs on the fiber mats could be tuned by varying the calcination temperature. Calcination of AuNPs-decorated PVP fibers at 500 degrees C-700 degrees C resulted in the uniform decoration of high density AuNPs with very narrow gaps on every single fiber, which in turn contribute to strong electromagnetic SERS enhancement. The robust free-standing AuNPs-decorated mat which calcined at 500 degrees C (500/AuNPs-F) exhibited high SERS activity toward cationic (methylene blue, MB) and anionic (methyl orange, MO) dyes in single and binary systems with a detection range from tens of nM to a few hundred mu M. The fabricated SERS substrate demonstrated high reproducibility with the spot-to-spot variation in SERS signal intensities was +/- 10% and +/- 12% for single and binary dye systems, respectively. The determination of MB and MO in spiked river water and tap water with 500/AuNPs-F substrate gave satisfactory results in terms of the percent spike recoveries (ranging from 92.6%-96.6%) and reproducibility (%RSD values less than 15 for all samples).
机译：电纺丝纳米材料到应用表面增强拉曼光谱（SERS）是一个迅速发展的领域，其保持在的便携式基于等离子体激元检测平台生成未来的发展潜力。在这项研究中，一种简单的方法来制造电纺丝聚（N-乙烯基吡咯烷酮）（PVP）盘碗垫通过组合电纺丝和煅烧提出了与金粒子（AuNPs）装饰。金纳米粒子是通过带正电荷的氨基硅烷基团和带负电的AuNP之间的静电相互作用的装饰纤维垫表面上。在纤维毡的AuNP的尺寸和覆盖密度可以通过改变煅烧温度来调谐。在500度C-700摄氏度导致高密度的AuNP的均匀装饰用在每个单独的纤维非常狭窄的间隙，而这又有助于强电磁SERS增强的AuNP装饰PVP纤维的煅烧。其下煅烧在500度的鲁棒自由站立的AuNP装饰垫（500 /金纳米-F）显示出高的SERS活性朝向阳离子（亚甲蓝，MB）和阴离子（甲基橙，MO）在单和二元体系用染料从几十nm到几百微米检测范围M.所制造的SERS衬底表现出高对于单和二元染料体系在SERS信号强度光斑与光点变异+/- 10％和12 +/-％的再现， 分别。 MB和MO的掺料在河水和自来水用500 /金纳米粒子-F衬底的判定，得到令人满意的结果中的百分标回收率（从92.6％-96.6％）和重现性（％RSD的值小于15的所有方面样本）。

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