Surface-Enhanced Raman Spectroscopy Sensors From Nanobiosilica With Self-Assembled Plasmonic Nanoparticles.
Surface-Enhanced Raman Spectroscopy Sensors From Nanobiosilica With Self-Assembled Plasmonic Nanoparticles.
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DOI：
10.1109/jstqe.2014.2301016
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发表时间：
2014-05
期刊：
影响因子：
--
通讯作者：
Wang AX
中科院分区：
文献类型：
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作者：
Ren F;Campbell J;Rorrer GL;Wang AX
我们提出了一种新颖的表面增强拉曼光谱(SERS)传感器，该传感器基于生物-等离子体杂化纳米结构，通过将银纳米粒子自组装成硅藻锥体。这种类似光子晶体的硅藻体提供了一个强度增强的空间受限电场，可以通过与银纳米粒子的光学耦合形成光子-等离子体混合模式。实验结果表明，对于共振和非共振SERS传感，拉曼染料的灵敏度分别提高了4-6倍和9-12倍。这种低成本、高灵敏度的SERS传感器在无标记生物传感方面具有巨大的潜力。
We present an innovative surface-enhanced Raman spectroscopy (SERS) sensor based on a biological-plasmonic hybrid nanostructure by self-assembling silver (Ag) nanoparticles into diatom frustules. The photonic-crystal-like diatom frustules provide a spatially confined electric field with enhanced intensity that can form hybrid photonic-plasmonic modes through the optical coupling with Ag nanoparticles. The experimental results demonstrate 4–6× and 9–12× improvement of sensitivities to detect the Raman dye for resonance and nonresonance SERS sensing, respectively. Such low-cost and high-sensitivity SERS sensors have significant potentials for label-free biosensing.