Facile fabrication of silver nanoparticle decorated alpha-Fe2O3 nanoflakes as ultrasensitive surface-enhanced Raman spectroscopy substrates
文献类型：期刊论文
| 作者 | Bekana, Deribachew; Liu, Rui; Li, Shasha ; Lai, Yujian; Liu, Jing-Fu
|
| 刊名 | ANALYTICA CHIMICA ACTA
 |
| 出版日期 | 2018-05-02 |
| 卷号 | 1006页码:74-82 |
| 关键词 | Silver nanoparticles alpha-Fe2O3 nanoflakes Fe foil Intrinsic internal standard Surface-enhanced Raman spectroscopy Arsenic detection |
| ISSN号 | 0003-2670 |
| 文献子类 | Article |
| 英文摘要 | Although great progress has been made on designing noble metal nanoparticle aggregates/assemblies as surface-enhanced Raman spectroscopy (SERS) substrates, an ever increasing research interest has focused on fabrication of hierarchical nanostructures for superior SERS performance. Here, we report effective decoration of silver nanoparticles (AgNPs) onto vertically and densely grown alpha-Fe2O3 nanoflakes (NFs) as SERS active substrates. The SERS substrate was prepared by thermally annealing Fe foil at 450 degrees C to grow alpha-Fe2O3 NFs and electroless deposition of AgNPs onto alpha-Fe2O3 NFs, with excellent ability to control the particle size and density. The AgNP-decorated alpha-Fe2O3 NFs offer high density hot spots and exhibited high SERS performance with enhancement factor of 8.1 x 10(6). Integration of alpha-Fe2O3 nanostructure functions as intrinsic internal standard and selective binder for specific analytes like the toxic arsenic. The substrate was successfully used for quantitative detection of arsenic with spatial uniformity (relative standard deviation, RSD, 8.8%) and good reproducibility (RSD, 9.7%). The Raman signal of alpha-Fe2O3 integrated to the SERS substrate was utilized as internal standard which significantly improves reproducibility. The substrate exhibited a high sensitivity for arsenic detection with a limit of detection down to 1.5 mu g L-1, which is much lower than permissible limit (10 mu g L-1) set by the WHO. Moreover, the SERS substrates showed excellent practicability and selectivity for determination of arsenic in environmental waters which is valuable for environmental and human health protection. (c) 2017 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/40943]  |
| 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 | Bekana, Deribachew,Liu, Rui,Li, Shasha,et al. Facile fabrication of silver nanoparticle decorated alpha-Fe2O3 nanoflakes as ultrasensitive surface-enhanced Raman spectroscopy substrates[J]. ANALYTICA CHIMICA ACTA,2018,1006:74-82. |
| APA | Bekana, Deribachew,Liu, Rui,Li, Shasha,Lai, Yujian,&Liu, Jing-Fu.(2018).Facile fabrication of silver nanoparticle decorated alpha-Fe2O3 nanoflakes as ultrasensitive surface-enhanced Raman spectroscopy substrates.ANALYTICA CHIMICA ACTA,1006,74-82. |
| MLA | Bekana, Deribachew,et al."Facile fabrication of silver nanoparticle decorated alpha-Fe2O3 nanoflakes as ultrasensitive surface-enhanced Raman spectroscopy substrates".ANALYTICA CHIMICA ACTA 1006(2018):74-82. |
入库方式： OAI收割
来源：生态环境研究中心
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