عنوان
پدید آورنده
موضوع
رده
کتابخانه
محل استقرار
شماره کتابشناسی ملی
شماره
TLpq2354843270
زبان اثر
زبان متن نوشتاري يا گفتاري و مانند آن
انگلیسی
عنوان و نام پديدآور
عنوان اصلي
Frequency and Time Domain Analysis of Carbon Nanotubes with Realistic Shape and Distribution
نام عام مواد
[Thesis]
نام نخستين پديدآور
Islam, Md. Khadimul
نام ساير پديدآوران
Hassan, Ahmed M.
وضعیت نشر و پخش و غیره
نام ناشر، پخش کننده و غيره
University of Missouri - Kansas City
تاریخ نشرو بخش و غیره
2019
مشخصات ظاهری
نام خاص و کميت اثر
87
یادداشتهای مربوط به پایان نامه ها
جزئيات پايان نامه و نوع درجه آن
M.S.
کسي که مدرک را اعطا کرده
University of Missouri - Kansas City
امتياز متن
2019
یادداشتهای مربوط به خلاصه یا چکیده
متن يادداشت
Carbon nanotube (CNT) composites have been of significant research interest in a wide range of applications. For electromagnetic applications, simplifying assumptions regarding the distribution and shapes of the CNTs are typically made because the exact three-dimensional CNT distribution in the composite is unknown. The goal of this work is to use experimentally characterized 3D CNT maps to study the effect of distribution and shape of the CNTs on the electromagnetic properties of the composite. Recently, electron tomography techniques have advanced to the point that they are capable of generating 3D maps of Multi-Walled Carbon Nanotubes (MWCNTs) distributions with sub-nanometer resolutions. The electromagnetic responses of these maps were calculated using both full-wave electromagnetic solvers and dilute limit effective medium approximations for multiple CNT volume fractions with different conductivities. The results show that the electromagnetic response calculated using these two methods differs significantly especially at higher terahertz frequencies. By also studying the shapes of CNTs, we found several multi-branched shapes denoted Y-shaped, K-shaped, and T-shaped CNTs. These complex-shaped CNT junctions lead to unique properties that depend on the atomic structure of the carbon atoms in the vicinity of the junction, leading in some cases to a nonlinear conductivity. The electromagnetic scattering characteristics of these nonlinear CNT structures need to be quantified to predict their response to incident electromagnetic radiation. Time-domain electromagnetic codes facilitate the analysis of scatterers with non-linear loads. Therefore, we used the Time Domain Integral Equation (TDIE) formulation and Method of Moments (MoM) to calculate the electromagnetic scattering characteristics of these complex-shaped CNTs structures with nonlinear conductivities. The CNT analysis in this work has the potential to lead to a better understanding of the electromagnetic responses of CNT composites, which will facilitate the accurate nondestructive electromagnetic evaluation of the CNT shapes and distributions, which control the overall mechanical, thermal and electrical properties of these composites.
موضوع (اسم عام یاعبارت اسمی عام)
موضوع مستند نشده
Electrical engineering
موضوع مستند نشده
Electromagnetics
موضوع مستند نشده
Physics
نام شخص به منزله سر شناسه - (مسئولیت معنوی درجه اول )
مستند نام اشخاص تاييد نشده
Hassan, Ahmed M.
مستند نام اشخاص تاييد نشده
Islam, Md. Khadimul
دسترسی و محل الکترونیکی
نام الکترونيکي
مطالعه متن کتاب وضعیت انتشار
فرمت انتشار
p
اطلاعات رکورد کتابشناسی
نوع ماده
[Thesis]
کد کاربرگه
276903
اطلاعات دسترسی رکورد
سطح دسترسي
a
تكميل شده
Y
