کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1665282 1518039 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Substrate-induced strain in carbon nanodisks
ترجمه فارسی عنوان
سویه های ناشی از سوبسترا در نانوسایل های کربنی
کلمات کلیدی
نانوذرات کربنی، میکروسکوپ نیروی اتمی، پراکندگی رامان، میکروسکوپ الکترونی اسکن خروجی میدان
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
چکیده انگلیسی


• Bending of carbon nanodisks is induced by the roughness of the gold substrate.
• Confocal Raman microscopy shows a compressive strain induced in the nanodisks.
• The electron microscopy contrast of nanodisks depends on the working distance.

Graphitic nanodisks of typically 20–50 nm in thickness, produced by the so-called Kvaerner Carbon Black and Hydrogen Process were dispersed on gold substrate and investigated by atomic force microscopy (AFM), field emission scanning electron microscopy (FE-SEM), and confocal Raman spectroscopy. The roughness of the gold surface was drastically changed by annealing at 400 °C. AFM measurements show that this change in the surface roughness induces changes also in the topography of the nanodisks, as they closely follow the corrugation of the gold substrate. This leads to strained nanodisks, which is confirmed also by confocal Raman microscopy. We found that the FE-SEM contrast obtained from the disks depends on the working distance used during the image acquisition by In-lens detection, a phenomenon which we explain by the decrease in the amount of electrons reaching the detector due to diffraction. This process may affect the image contrast in the case of other layered materials, like hexagonal boron nitride, and other planar hybrid nanostructures, too.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 565, 28 August 2014, Pages 111–115
نویسندگان
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