Nanoparticle SERS substrates with 3D Raman-active volumes.
Nanoparticle SERS substrates with 3D Raman-active volumes.
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DOI：
10.1039/c1sc00125f
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发表时间：
2011-08-01
期刊：
影响因子：
8.4
通讯作者：
Odom TW
中科院分区：
文献类型：
--
作者：
Stoerzinger KA;Lin JY;Odom TW
这一观点回顾了一类新的表面增强拉曼散射（Sers）纳米粒子基板定义的三维（3D）局限的局部电磁场。首先，我们描述了关键的设计参数和最近的进展，在nanofabbands创建可重复的纳米粒子组件的Sers。接下来，我们强调了一个有前途的平台-金纳米金字塔-用于测试组装中颗粒的局部排列如何影响整体Sers响应。纳米锥的尺寸和光学性质可以很容易地调整，并且它们独特的各向异性形状允许它们被组织成具有3D拉曼活性体积的不同颗粒配置。由于其大的热点体积，这类独特的纳米颗粒基底为超灵敏传感器和痕量化学分析提供了一种有吸引力的替代方案。
This Perspective reviews a new class of surface-enhanced Raman scattering (SERS) nanoparticle substrates defined by their three-dimensional (3D) confinement of localized electromagnetic fields. First, we describe the critical design parameters and recent advances in nanofabrication to create reproducible nanoparticle assemblies for SERS. Next, we highlight a promising platform—gold nanopyramids—for testing how the local arrangement of particles in an assembly affects the overall SERS response. The dimensions and optical properties of the nanopyramids can be tuned easily, and their unique anisotropic shape allows them to be organized into different particle configurations with 3D Raman-active volumes. Because of their large hot-spot volumes, this unique class of nanoparticle substrates offers an attractive alternative for ultra-sensitive sensors and trace chemical analysis.