Plasmon-Enhanced Fluorescence in Electrospun Nanofibers of Polydiacetylenes Infused with Silver Nanoparticles
Plasmon-Enhanced Fluorescence in Electrospun Nanofibers of Polydiacetylenes Infused with Silver Nanoparticles
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DOI：
10.1021/acs.langmuir.1c02805
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发表时间：
2021-12-14
期刊：
影响因子：
3.9
通讯作者：
Cheng, Quan
中科院分区：
文献类型：
--
作者：
Burris, Andrew J.;Cheng, Quan
采用计算和实验相结合的方法，合理设计了聚环氧乙烷（PEO）静电纺丝基质中的银纳米粒子（AgNP）/聚丁二炔（PDA）金属增强荧光团（MEF）体系，以构建高性能的传感器.基于Mie理论和时域有限差分（FDTD）算法的模拟进行了解和优化的AgNP本地化的表面等离子体共振和PDA，超分子聚合物荧光团的吸收和发射光谱之间的光谱重叠。研究了一系列不同尺寸的AgNPs的荧光增强能力，并选择直径为134 nm的最佳尺寸用于合成并掺入PDA/PEO复合材料的电纺纳米纤维中以进行实验表征和确认。对单个纳米纤维的结果表明了明显的金属增强荧光效应，并且观察到了比纯PDA/PEO荧光纳米纤维增强4.6倍。纳米粒子/MEF集成系统提供了新的途径，用于产生有效的传感装置与聚合物荧光团使用一个简单的掺入方法。
A hybrid computational and experimental approach was employed toward the rational design of a silver nanoparticle (AgNP)/ polydiacetylene (PDA) metal-enhanced fluorophore (MEF) ensemble system contained within a poly(ethylene oxide) (PEO) electrospun nanofiber matrix for creation of high-performance sensors. Simulations based on Mie theory and finite-difference time domain (FDTD) algorithms were performed to understand and optimize spectral overlap between the AgNP localized surface plasmon resonance and the absorbance and emission spectra of PDA, a supramolecular polymer fluorophore. A series of AgNPs of varied sizes were investigated for fluorescence enhancement capability, and an optimal size of 134 nm in diameter was chosen for synthesis and incorporation into the electrospun nanofibers of a PDA/PEO composite for experimental characterization and confirmation. Results on individual nanofibers indicated a clear metal-enhanced fluorescence effect, and a 4.6-fold enhancement over neat PDA/PEO fluorescent nanofibers was observed. The nanofiber/nanoparticle/MEF ensemble system offers new avenues for generating effective sensing devices with polymeric fluorophores using a straightforward incorporation approach.