کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
807376 1468290 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A nanoporous gold membrane for sensing applications
ترجمه فارسی عنوان
غشای طلای نانوپور برای سنجش کاربرد
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• 3D structured gold microcavity membrane with a nanopore in the base designed
• Theoretically for plasmon-enhanced detection
• Fabrication of gold microcavity membrane with a nanopore
• ‘Proof of concept’ study showing enhanced Raman scattering detection

Design and fabrication of three-dimensionally structured, gold membranes containing hexagonally close-packed microcavities with nanopores in the base, are described. Our aim is to create a nanoporous structure with localized enhancement of the fluorescence or Raman scattering at, and in the nanopore when excited with light of approximately 600 nm, with a view to provide sensitive detection of biomolecules. A range of geometries of the nanopore integrated into hexagonally close-packed assemblies of gold micro-cavities was first evaluated theoretically. The optimal size and shape of the nanopore in a single microcavity were then considered to provide the highest localized plasmon enhancement (of fluorescence or Raman scattering) at the very center of the nanopore for a bioanalyte traversing through. The optimized design was established to be a 1200 nm diameter cavity of 600 nm depth with a 50 nm square nanopore with rounded corners in the base. A gold 3D-structured membrane containing these sized microcavities with the integrated nanopore was successfully fabricated and ‘proof of concept’ Raman scattering experiments are described.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensing and Bio-Sensing Research - Volume 7, March 2016, Pages 133–140
نویسندگان
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