کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7833524 1503522 2018 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Phase confinement of self-migrated plasmonic silver in triphasic system: Offering 3D hot spots on hydrophobic paper for SERS detection
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Phase confinement of self-migrated plasmonic silver in triphasic system: Offering 3D hot spots on hydrophobic paper for SERS detection
چکیده انگلیسی
Hydrophobic paper decorated Ag nanoparticles (NPs) with a uniform distribution was fabricated in an oil-paper-aqueous triphasic system via a facile in situ interfacial reduction approach. Interestingly, the Ag NPs formed at the paper/aqueous interface could migrate to the oil/paper interface. Moreover, these Ag NPs would not continue to migrate away the paper surface into the oil phase but was completely confined in the solid paper matrix. This phase confinement of migrated Ag NPs in the paper matrix creates abundant 3D hot spots for plasmonic enhancement. The obtained Ag-loaded paper exhibits an excellent SERS activity, reliable reproducibility and autofluorescence suppression effect, which enabling it as a promising platform for qualitative and quantitative SERS study. Due to its condensation effect, the hydrophobic paper surface can be used as a concentrator to enrich water-soluble analytes over the SERS active domains for highly sensitive detection (10−9 mol/L−1). Furthermore, the Ag-loaded paper combined with the feature of chromatography and plamon-enhanced optical signals possesses ability to perform synchronous separation and surface-enhanced Raman scattering (SERS) detection of complex samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 450, 30 August 2018, Pages 138-145
نویسندگان
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