Plasmon-Tuned Particles for the Amplification of Surface-Enhanced Raman Scattering from Analytes.
Plasmon-Tuned Particles for the Amplification of Surface-Enhanced Raman Scattering from Analytes.
复制标题
DOI：
10.1021/acs.langmuir.2c02451
复制
发表时间：
2022-11
期刊：
影响因子：
--
通讯作者：
T. T. S. de Oliveira-T.;A. Abbasi;I. Andreu;A. Bose
中科院分区：
文献类型：
--
作者：
T. T. S. de Oliveira-T.;A. Abbasi;I. Andreu;A. Bose
由于振动模式，分子的非弹性散射产生独特的拉曼位移，使这些分析物能够以高特异性检测。由于拉曼散射很弱，表面增强拉曼散射（Sers）已被用作检测低浓度的各种分析物的无标记技术。使用简单的基于溶液的胶体加工技术，我们已经制造了金涂层的炭黑纳米粒子，显示增强的拉曼活性。通过改变制造条件，我们创建不同表面形态的颗粒，允许控制局部表面等离子体共振（LSPR）的峰值波长。通过将LSPR波长与入射激光波长匹配，我们从两种模型分析物4-硝基苯乙胺（4-NBT）和刚果红（CR）获得了最高信号。我们简单的室温溶液为基础的方法，使可调SERS活性颗粒扩大了入射辐射波长的范围，可用于检测分析物使用拉曼散射。
Inelastic scattering from molecules because of vibrational modes produces unique Raman shifts, allowing these analytes to be detected with high specificity. Because Raman scattering is weak, surface-enhanced Raman scattering (SERS) has been used as a label-free technique for the detection of a variety of analytes at low concentrations. Using simple solution-based colloidal processing techniques, we have fabricated gold-coated carbon-black nanoparticles that show enhanced Raman activity. By varying the fabrication conditions, we create particles of different surface morphologies, allowing control over the peak wavelength for localized surface plasmon resonance (LSPR). By matching the LSPR wavelength to the incident laser wavelength, we get the highest signal from two model analytes, 4-nitrobenzenethiol (4-NBT) and Congo Red (CR). Our straightforward room-temperature-solution-based approach for making tunable SERS-active particles expands the range of incident radiation wavelengths that can be used for the detection of analytes using Raman scattering.