کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1167084 1491123 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Surface-enhanced Raman scattering-active silver nanostructures with two domains
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Surface-enhanced Raman scattering-active silver nanostructures with two domains
چکیده انگلیسی

Generally, a controllable and reproduced surface roughness for surface-enhanced Raman scattering (SERS) studies can be generated through control of the electrochemical oxidation–reduction cycles (ORC) procedure. In this work, we propose a new sonoelectrochemical approach to prepare SERS-active substrates with two domain-Ag nanostructures. The method is based on a strategy of deposition–dissolution cycles (DDCs) by using a cathodic overpotential and an anodic overpotential from open circuit potential (OCP) in turn under sonication. The prepared SERS-active substrate demonstrates large Raman scattering enhancement for adsorbed Rhodamine 6G (R6G) with an enhancement factor of 2.3 × 108 and a limit of detection of 2 × 10−13 M. The improved SERS performances can be successfully explained from the viewpoints of electromagnetic (EM) and chemical (CHEM) enhancements.

SEM image of Ag NSs-deposited Pt substrate prepared by sonoelectrochemical deposition–dissolution cycles under a cathodic overpotential of 0.6 V and an anodic overpotential of 0 V from OCP with a ratio of reaction times of deposition to dissolution of Ag NSs to be 0.2.Figure optionsDownload as PowerPoint slideHighlights
► Prepare new SERS-active substrates with two domain-Ag na nostructures.
► The method is based on a strategy of electrochemical deposition–dissolution cycles.
► Raman scattering enhancement for R6G with an enhancement factor of 2.3 × 108.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volume 709, 4 January 2012, Pages 91–97
نویسندگان
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