Polydopamine-Enabled Approach toward Tailored Plasmonic Nanogapped Nanoparticles: From Nanogap Engineering to Multifunctionality.
Polydopamine-Enabled Approach toward Tailored Plasmonic Nanogapped Nanoparticles: From Nanogap Engineering to Multifunctionality.
复制标题
聚多巴胺实现定制等离子体纳米间隙纳米粒子的方法：从纳米间隙工程到多功能性
DOI：
10.1021/acsnano.6b05951
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发表时间：
2016-12-27
期刊：
影响因子：
17.1
通讯作者：
Duan H
中科院分区：
文献类型：
--
作者：
Zhou J;Xiong Q;Ma J;Ren J;Messersmith PB;Chen P;Duan H
我们提出了一种平台策略，该策略提供了多种灵活性，可以定制具有内置纳米间隙的核壳等离子体纳米粒子的结构和特性。我们的研究结果表明，聚多巴胺具有多种协同功能，可以作为纳米级间隔剂，提供可控的纳米间隙尺寸；作为氧化还原活性涂层，促进金属壳的生长；作为反应性支架，将分子探针锁定在纳米间隙内，用于表面增强拉曼散射（SERS）。更有趣的是，聚多巴胺在不同胶体基质上的普遍粘附使得定制合成多壳等离子体纳米间隙纳米颗粒（NNPs）和含有不同核的多功能杂化NNPs（即磁性纳米颗粒）成为可能，这是传统方法难以获得的。内部耦合等离子体NNPs具有广泛可调谐的光谱特性、高活性SERS和多功能性，在传感、光电子和治疗等新兴领域具有巨大的前景，正如超灵敏的SERS检测和有效的光热杀灭食源性病原体所证明的那样。
We present a platform strategy that offers diverse flexibility in tailoring the structure and properties of core–shell plasmonic nanoparticles with built-in nanogaps. Our results have demonstrated that polydopamine serves multiple concerted functions as a nanoscale spacer to afford controllable nanogap sizes, a redox-active coating to promote metal shell growth, and a reactive scaffold to exclusively lock molecular probes inside the nanogap for surface-enhanced Raman scattering (SERS). More interestingly, the universal adhesion of polydopamine on diverse colloidal substrates allows for customized synthesis of multishell plasmonic nanogapped nanoparticles (NNPs) and multifunctional hybrid NNPs containing different cores (i.e., magnetic nanoparticles), which are not readily accessible by conventional methods. Internally coupled plasmonic NNPs with broadly tunable spectroscopic properties, highly active SERS, and multifunctionality hold great promise for emerging fields, such as sensing, optoelectronics, and theranostics, as demonstrated by the ultrasensitive SERS detection and efficient photothermal killing of food-borne pathogens here.
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