等离子体子
纳米技术
材料科学
等离子纳米粒子
光热治疗
纳米颗粒
涂层
拉曼散射
纳米尺度
拉曼光谱
光电子学
光学
物理
作者
Jiajing Zhou,Qirong Xiong,Jielin Ma,Jinghua Ren,Phillip B. Messersmith,Peng Chen,Hongwei Duan
出处
期刊:ACS Nano
[American Chemical Society]
日期:2016-12-01
卷期号:10 (12): 11066-11075
被引量:117
标识
DOI:10.1021/acsnano.6b05951
摘要
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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