کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1544604 1512893 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Single crystalline graphene synthesized by thermal annealing of humic acid over copper foils
ترجمه فارسی عنوان
گرافین تنها کریستالی است که توسط آنیلینگ حرارتی اسید هومیک روی فویل مس ساخته شده است
کلمات کلیدی
اسید هومیک، گرافنفل، گرافن کریستالی تک، آنیلینگ حرارتی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی


• Humic acid, graphenol and activated carbon have been used to grow single crystalline graphene.
• At 1050 °C the three carbon sources used in this study produces pristine graphene nanosheets.
• At 1100 °C single crystalline graphene have been observed only in the case of the humic acid.

Production of graphene by thermal annealing on copper foil substrates has been studied with different sources of carbon. The three carbon sources include humic acid derived from leonardite, graphenol, and activated charcoal. Hexagonal single crystalline graphene has been synthesized over the copper foil substrates by thermal annealing of humic acid, derived from leonardite, in argon and hydrogen atmosphere (Ar/H2=20). The annealing temperature was varied between 1050 °C and 1100 °C at atmospheric pressure. Samples have been investigated using scanning electron microscope (SEM) and Raman spectroscopy. At lower temperatures the thermal annealing of the three carbon sources used in this study produces pristine graphene nanosheets which cover almost the whole substrate. However when the annealing temperature has been increased up to 1100 °C, hexagonal single crystalline graphene have been observed only in the case of the humic acid. Raman analysis showed the existence of 2D band around 2690 cm−1.

Graphene has been synthesized by thermal annealing of three carbon sources include humic acid derived from leonardite, graphenol, and activated charcoal.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 56, February 2014, Pages 331–336
نویسندگان
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