کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1647765 1007544 2012 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and microwave absorbing property of silver-coated graphite nanosheet NanoG with Pyrrole
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Preparation and microwave absorbing property of silver-coated graphite nanosheet NanoG with Pyrrole
چکیده انگلیسی

Microwave absorbing material PPy/Ag/NanoG was prepared by in situ polymerization of Pyrrole on the surface of silver-coated conductive graphite nanosheet (Ag/NanoG). The morphologies and nanostructures of PPy, Ag/NanoG and PPy/Ag/NanoG were characterized by scanning electron microscope (SEM), energy dispersive spectroscopy analysis (EDS) and X-ray diffraction analysis (XRD) respectively. Results show that Ag/NanoG has layered structure with high aspect ratio (width-to-thickness) and most of Ag/NanoG nanoparticles are encapsulated by PPy. Measurement of electromagnetic parameters shows that the complex permittivity (ε* = ε′–jε″), complex permeability (μ* = μ′–jμ″), dielectric loss tanδe = ε″/ε′ and magnetic loss tanδm = μ″/μ′ of PPy/Ag/NanoG are superior to those of PPy. The reflection loss of PPy/Ag/NanoG is below −15 dB at the X band from 8.2 GHz to 12.4 GHz and the minimum loss value is − 18.21 dB at 9.86 GHz.

Figure optionsDownload as PowerPoint slideHighlights
► NanoG was chemically coated by nano-Ag.
► PPy/Ag/NanoG was prepared via in situ polymerization of PPy on Ag/NanoG.
► PPy, Ag/NanoG and PPy/Ag/NanoG were characterized by SEM, XRD and EDS.
► The microwave absorbing property of PPy/Ag/NanoG is superior to that of PPy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 66, Issue 1, 1 January 2012, Pages 229–232
نویسندگان
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