کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8037784 1518295 2018 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Imaging surface acoustic wave dynamics in semiconducting polymers by scanning ultrafast electron microscopy
ترجمه فارسی عنوان
پویایی موج آکوستیک سطح تصویربرداری در پلیمرهای نیمه هادی توسط میکروسکوپ الکترونی فوق العاده اسکن
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
چکیده انگلیسی
Understanding the mechanical properties of organic semiconductors is essential to their electronic and photovoltaic applications. Despite a large volume of research directed toward elucidating the chemical, physical and electronic properties of these materials, little attention has been directed toward understanding their thermo-mechanical behavior. Here, we report the ultrafast imaging of surface acoustic waves (SAWs) on the surface of the Poly(3-hexylthiophene-2,5-diyl) (P3HT) thin film at the picosecond and nanosecond timescales. We then use these images to measure the propagation velocity of SAWs, which we then employ to determine the Young's modulus of P3HT. We further validate our experimental observation by performing a semi-empirical transient thermoelastic finite element analysis. Our findings demonstrate the potential of ultrafast electron microscopy to not only probe charge carrier dynamics in materials as previously reported, but also to measure their mechanical properties with great accuracy. This is particularly important when in situ characterization of stiffness for thin devices and nanomaterials is required.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultramicroscopy - Volume 184, Part A, January 2018, Pages 46-50
نویسندگان
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