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纳米多孔金纳米复合材料作为用于等离子体工程和传感的通用平台

Nanoporous Gold Nanocomposites as a Versatile Platform for Plasmonic Engineering and Sensing.

作者信息

Zhao Fusheng, Zeng Jianbo, Shih Wei-Chuan

机构信息

Department of Electrical and Computer Engineering, University of Houston, 4800 Calhoun Rd, Houston, TX 77004, USA.

Department of Biomedical Engineering, University of Houston, 4800 Calhoun Rd, Houston, TX 77004, USA.

出版信息

Sensors (Basel). 2017 Jun 28;17(7):1519. doi: 10.3390/s17071519.

DOI:10.3390/s17071519
PMID:28657586
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5539714/
Abstract

Plasmonic metal nanostructures have shown great potential in sensing applications. Among various materials and structures, monolithic nanoporous gold disks (NPGD) have several unique features such as three-dimensional (3D) porous network, large surface area, tunable plasmonic resonance, high-density hot-spots, and excellent architectural integrity and environmental stability. They exhibit a great potential in surface-enhanced spectroscopy, photothermal conversion, and plasmonic sensing. In this work, interactions between smaller colloidal gold nanoparticles (AuNP) and individual NPGDs are studied. Specifically, colloidal gold nanoparticles with different sizes are loaded onto NPGD substrates to form NPG hybrid nanocomposites with tunable plasmonic resonance peaks in the near-infrared spectral range. Newly formed plasmonic hot-spots due to the coupling between individual nanoparticles and NPG disk have been identified in the nanocomposites, which have been experimentally studied using extinction and surface-enhanced Raman scattering. Numerical modeling and simulations have been employed to further unravel various coupling scenarios between AuNP and NPGDs.

摘要

等离子体金属纳米结构在传感应用中已展现出巨大潜力。在各种材料和结构中，整体式纳米多孔金盘（NPGD）具有若干独特特性，如三维（3D）多孔网络、大表面积、可调谐的等离子体共振、高密度热点以及出色的结构完整性和环境稳定性。它们在表面增强光谱学、光热转换和等离子体传感方面展现出巨大潜力。在这项工作中，研究了较小的胶体金纳米颗粒（AuNP）与单个NPGD之间的相互作用。具体而言，将不同尺寸的胶体金纳米颗粒加载到NPGD基板上，以形成在近红外光谱范围内具有可调谐等离子体共振峰的NPG混合纳米复合材料。在纳米复合材料中已识别出由于单个纳米颗粒与NPG盘之间的耦合而新形成的等离子体热点，并使用消光和表面增强拉曼散射对其进行了实验研究。已采用数值建模和模拟来进一步揭示AuNP与NPGD之间的各种耦合情况。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/bbc12edbb012/sensors-17-01519-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/890d967d9a3f/sensors-17-01519-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/f5c5d4f13668/sensors-17-01519-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/eafbe5ece150/sensors-17-01519-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/ab81f07a903d/sensors-17-01519-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/020d844acdaf/sensors-17-01519-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/5081058d1518/sensors-17-01519-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/4976b8470ffb/sensors-17-01519-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/d56c1817aad2/sensors-17-01519-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/9e3dc797d524/sensors-17-01519-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/bbc12edbb012/sensors-17-01519-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/890d967d9a3f/sensors-17-01519-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/f5c5d4f13668/sensors-17-01519-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/eafbe5ece150/sensors-17-01519-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/ab81f07a903d/sensors-17-01519-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/020d844acdaf/sensors-17-01519-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/5081058d1518/sensors-17-01519-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/4976b8470ffb/sensors-17-01519-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/d56c1817aad2/sensors-17-01519-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/9e3dc797d524/sensors-17-01519-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6012/5539714/bbc12edbb012/sensors-17-01519-g010.jpg

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