Multifunctional Fe3O4@SiO2-Au Satellite Structured SERS Probe for Charge Selective Detection of Food Dyes
文献类型：期刊论文
| 作者 | Sun, Zhenli; Du, Jingling; Yan, Li; Chen, Shu; Yang, Zhilin; Jing, Chuanyong |
| 刊名 | ACS APPLIED MATERIALS & INTERFACES
 |
| 出版日期 | 2016-02-10 |
| 卷号 | 8期号:5页码:3056-3062 |
| 关键词 | SERS tunable gap selective detection food dye charge transfer |
| 英文摘要 | Nanofabrication of multifunctional surface-enhanced Raman scattering (SERS) substrates is strongly desirable but currently remains a challenge. The motivation of this study was to design such a substrate, a versatile core satellite Fe3O4@SiO2 Au (FA) hetero-nanostructure, and demonstrate its use for charge selective detection of food dye molecules as an exemplary application. Our experimental results and three-dimensional finite difference time domain (FDTD) simulation suggest that tuning the Au nanoparticle (NP) gap to sub-10 nm, which could be readily accomplished, substantially enhanced the Ronan signals. Further layer-by-layer deposition of a charged polyelectrolyte on this magnetic SERS substrate induced active adsorption and selective detection of food dye molecules of opposite charge on the substrates. Molecular dynamics (MD) simulations suggest that the selective SERS enhancement could be attributed to the high affinity and close contact (within a 20 angstrom range) between the substrate and molecules. Density function theory (DFT) calculations confirm the charge transfer from food dye molecules to Au NPs -via the polyelectrolytes. This multifunctional SERS platform provides easy separation and selective detection of charged molecules from complex chemical mixtures. |
| 收录类别 | SCI |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/35903]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Sun, Zhenli,Du, Jingling,Yan, Li,et al. Multifunctional Fe3O4@SiO2-Au Satellite Structured SERS Probe for Charge Selective Detection of Food Dyes[J]. ACS APPLIED MATERIALS & INTERFACES,2016,8(5):3056-3062. |
| APA | Sun, Zhenli,Du, Jingling,Yan, Li,Chen, Shu,Yang, Zhilin,&Jing, Chuanyong.(2016).Multifunctional Fe3O4@SiO2-Au Satellite Structured SERS Probe for Charge Selective Detection of Food Dyes.ACS APPLIED MATERIALS & INTERFACES,8(5),3056-3062. |
| MLA | Sun, Zhenli,et al."Multifunctional Fe3O4@SiO2-Au Satellite Structured SERS Probe for Charge Selective Detection of Food Dyes".ACS APPLIED MATERIALS & INTERFACES 8.5(2016):3056-3062. |
入库方式： OAI收割
来源：生态环境研究中心
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