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首页> 外文会议>2014 Third Mediterranean Photonics Conference >Plasmon-enhanced Raman spectroscopy: Towards hyperuniform ultrasensitive enhancement through hyperuniform disorder
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Plasmon-enhanced Raman spectroscopy: Towards hyperuniform ultrasensitive enhancement through hyperuniform disorder

机译：等离子体增强拉曼光谱：通过超均匀性疾病向超均匀性超敏增强

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摘要

We are developing a polymer-silver nanocomposite self-assembling-based protocol for fabricating surface-enhanced Raman scattering (SERS) substrates for versatile applications. The substrate is based on a silver-made fractal nanotexture produced by the long-range self-assembling of Ag-loaded block-copolymer micelles. We removed the nano-packing limitation imposed by the copolymer shell, achieving a condition close to the so-called hyperuniform structural disorder. Despite the large enhancement factor, estimated up to 109, the SERS response shows an ultrahigh spatial uniformity with a relative standard deviation in the range 0.9% – 5.6%, as measured from raster scans covering a total area of 1 cm2, that is from an active surface orders of magnitude larger than the typical nanofeature size and produced by an innovative low-cost and immediate deposition. The SERS-active coating allows large-scale spectroscopic scanning as required for real biological applications, still having, as experimentally evidenced, single-molecule sensitivity.
机译：我们正在开发一种基于聚合物-银纳米复合材料自组装的协议，以制造用于多种应用的表面增强拉曼散射（SERS）衬底。基材基于通过载银的嵌段共聚物胶束的长期自组装产生的银制分形纳米纹理。我们消除了共聚物壳所施加的纳米堆积限制，从而实现了一种接近所谓的超均匀结构紊乱的条件。尽管增强因子很大，估计高达109，但SERS响应仍显示出超高的空间均匀性，相对标准偏差范围为0.9％– 5.6％，这是通过覆盖1 cm2的总面积的光栅扫描测得的，即活性表面的数量级比典型的纳米特征尺寸大，并通过创新的低成本和立即沉积产生。 SERS活性涂层允许进行真实生物应用所需的大规模光谱扫描，但仍具有单分子敏感性，这已通过实验证明。

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