نانومقیاس

نانومقیاس

طراحی و ساخت نانوکامپوزیت MoSe2/MMT/MWCNT با هدف بهبود کارایی جذب مایکروویو در باند های X و Ku

نوع مقاله : مقاله پژوهشی

نویسندگان
1 دانشکده علوم پایه، دانشگاه ولی عصر (عج)، رفسنجان، کرمان
2 دانشگاه ولیعصر(عج) دانشکده علوم پایه گروه فیزیک
3 دانشیارگروه فیزیک، دانشکده علوم پایه، دانشگاه ولی عصر (عج)، رفسنجان، کرمان
چکیده
ما در این مطالعه به طراحی، ساخت و خواص جذب مایکروویو نانوکامپوزیت های MoSe2/MMTو MoSe2/MMT/MWCNT خواهیم پرداخت این طراحی نوآورانه در نانوتکنولوژی می‌تواند به توسعه مواد جدید با کاربردهای گسترده منجر شود. این نانوکامپوزیت ها با استفاده از روش هیدروترمال ساخته شدند، تصاویر FESEM نشان دهنده نانوصفحات و نانومیله‌ها با مورفولوژی خاص است. در ادامه خواص جذب مایکروویو نمونه ها در باند های X و Ku با جزییات بررسی شد و نتایج نشان داد نانوکامپوزیت MoSe2/MMT مقدار حداقل افت بازتاب 28- دسی‌بل با پهنای باند 33/2 گیگاهرتز در ضخامت 9/1 میلی متر را از خود نشان می‌دهد، در ادامه نانوکامپوزیت MoSe2/MMT/MWCNT با ساختار سه گانهD 1/D2/D2 فصل مشترک وسیعی را برای ایجاد تعداد زیادی دوقطبی فراهم می‌کند و قطبش فصل مشترک حاصل برای اتلاف انرژی موج EM مطلوب در فرکانس 90/14 گیگاهرتز با ضخامت 4/1میلی متر همراه است. همچنین افت بازتاب عالی 02/67- دسی‌بل(معادل 90% تضعیف) با پهنای باند 78/4 گیگاهرتز را از خود نشان داد، افت بازتاب چشمگیر نتیجه هم افزایی اثرات عوامل مختلف مانند ساختارهای لایه‌ای، فصل مشترک ناهمگن، ساختارهای چند بعدی و ایجاد نقص همچنین قطبش های سطحی است. استراتژی ما ساخت نانوکامپوزیت‌های مبتنی بر نیم‌رسانا، دی‌الکتریک و رسانا است، به دلیل ترکیب خواص مختلف و قابلیت تنظیم آن‌ به عنوان مواد امیدوارکننده جاذب مایکروویو سبک وزن با کارایی بالا معرفی می گردد.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Design and fabrication of a MoSe2/MMT/MWCNT nanocomposite aimed at enhancing microwave absorption efficiency in the X and Ku frequency bands

نویسندگان English

Mahdieh Dehghani-Dashtabi 1
Hoda Hekmatara 2
Masoud mohebbi 3
1 Department of physics, Faculty of Basic sciences, Vali-e-Asr, Rafsanjan
2 Department of Physics, Faculty of Science, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran
3 Department of physics, Faculty of Basic sciences, Vali-e-Asr, Rafsanjan
چکیده English

In this study, we examine the design, fabrication, and microwave absorption properties of MoSe2/MMT and MoSe2/MMT/MWCNT nanocomposites. This innovative approach within the field of nanotechnology holds the potential for the development of novel materials with extensive applications. The nanocomposites were synthesized utilizing a hydrothermal method. Field Emission Scanning Electron Microscopy (FESEM) images reveal the presence of nanosheets and nanorods exhibiting distinct morphologies. Subsequently, we conducted a thorough investigation of the microwave absorption properties of the samples in the X and Ku bands. The results indicate that the MoSe2/MMT nanocomposite achieves a minimum reflection loss of -28 dB (corresponding to 90% attenuation) over a bandwidth of 2.33 GHz at a thickness of 1.3 mm. In contrast, the MoSe2/MMT/MWCNT nanocomposite, characterized by a ternary structure of 2D/2D/1D, provides multiple interfaces that generate a substantial number of dipoles, facilitating interface polarization that effectively dissipates electromagnetic wave energy. This configuration yields optimal performance at 14.90 GHz with a thickness of 1.4 mm, demonstrating an exceptional reflection loss of -67.02 dB across a bandwidth of 4.78 GHz. The significant reflection loss can be attributed to the synergistic effects of various factors, including layered structures, heterogeneous interfaces, multidimensional architectures, and the introduction of defects, as well as surface polarizations. Our approach aims to fabricate dielectric and conductive nanocomposites, which are positioned as promising lightweight microwave absorber materials with high efficiency due to their combined properties and tunable characteristics.

کلیدواژه‌ها English

Molybdenum diselenide
Microwave absorption
Montmorillonite
Carbon nanotubes
Nanocomposite
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دوره 12، شماره 2
تابستان 1404
صفحه 199-209

  • تاریخ دریافت 29 اردیبهشت 1404
  • تاریخ بازنگری 09 آبان 1404
  • تاریخ پذیرش 27 آذر 1404