کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1677520 1518354 2013 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Image formation mechanisms in scanning electron microscopy of carbon nanotubes, and retrieval of their intrinsic dimensions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Image formation mechanisms in scanning electron microscopy of carbon nanotubes, and retrieval of their intrinsic dimensions
چکیده انگلیسی

We present a detailed analysis of the image formation mechanisms that are involved in the imaging of carbon nanotubes with scanning electron microscopy (SEM). We show how SEM images can be modelled by accounting for surface enhancement effects together with the absorption coefficient for secondary electrons, and the electron-probe shape. Images can then be deconvoluted, enabling retrieval of the intrinsic nanotube dimensions. Accurate estimates of their dimensions can thereby be obtained even for structures that are comparable to the electron-probe size (on the order of 2 nm). We also present a simple and robust model for obtaining the outer diameter of nanotubes without any detailed knowledge about the electron-probe shape.


► We model the image formation of free-standing carbon nanotubes in SEM.
► The electron-probe shape is characterized from SEM-images.
► We use the electron-probe shape to deconvolute SEM-images of carbon nanotubes.
► We present a simple method for retrieval of intrinsic nanotube dimensions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultramicroscopy - Volume 124, January 2013, Pages 35–39
نویسندگان
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