Synthesis of crystalline Tellurium nanowires by thin film fabrication via thermal evaporation method

Document Type : Original Article

Authors

1 Research Institute of Applied Sciences, Academic Center of Education, Culture and Research (ACECR) Shahid Beheshti University, Tehran, Iran

2 Research Institute of Applied Sciences (ACECR), Shahid Beheshti University, Tehran, Iran.

Abstract

Tellurium nanostructures have attracted much interest due to their interesting
properties such as gas sensing, photoconductivity, nonlinear optical response, and
high thermoelectric or piezoelectric responses. Crystalline Tellurium nanowires were
successfully synthesized at 10-1 mbar, 10-2 mbar, and 10-3 mbar pressures by thin film
fabrication via evaporation of Tellurium powder and its condensation on glass
substrates at different temperatures in a tube furnace. The morphology and size of the
products were studied using field emission scanning electron microscopy (FESEM).
The synthesized nanowires have diameters between 46 and 100 nm and lengths up to
several micrometers. X-Ray diffractometry (XRD) was carried out to characterize
crystal structure of the products. The peaks of the diffractogram were successfully
indexed assuming the hexagonal crystal structure of Tellurium.

Keywords

Article Title [فارسی]

سنتز نانوسیم های کریستالی تلوریوم به وسیله ایجاد لایه نازک از طریق روش تبخیر حرارتی

Authors [فارسی]

  • ناهید پارسافر 1
  • اکبر ابراهیم زاد 2

1 گروه فیزیک، پژوهشکده علوم پایه کاربردی جهاد دانشگاهی

2 گروه فیزیک، پژوهشکده علوم پایه کاربردی جهاد دانشگاهی

Abstract [فارسی]

نانوساختارهای تلوریوم به دلیل خواص جالبی همچون حسگری گاز، نوررسانایی، پاسخ نوری غیرخطی و پاسخ‌های بزرگ ترموالکتریک یا پیزوالکتریک توجه زیادی را به خود جلب کرده است. نانوسیم‌های کریستالی تلوریومی با موفقیت در فشارهای 0.1، 0.01 و 0.001 میلی بار به وسیله ساخت لایه نازک و روش ساده تبخیر پودر تلوریوم و چگالش بخار آن بر روی زیرلایه شیشه‌ای در دماهای مختلف در یک کوره لوله‌ای سنتز شدند. مورفولوژی و اندازه محصولات با استفاده از میکروسکوپ الکترونی روبشی گسیل میدانی (FESEM) مورد بررسی قرار گرفت. نانوسیم‌های سنتز شده دارای قطرهایی بین 46 تا 100 نانومتر و طول‌هایی تا چند میکرومتر هستند. پراش‌سنجی اشعه ایکس (XRD) برای مشخصه‌یابی ساختار کریستالی محصولات انجام شد. قله‌های نقشه پراش با فرض ساختار کریستالی شش وجهی تلوریم با موفقیت ایندکس شدند.

Keywords [فارسی]

  • تلوریوم
  • نانوسیم
  • تبخیر حرارتی
  • کوره لوله ای
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