مطالعه اثر ترموالکتریک در رژیم پاسخ غیرخطی: بروز مقاومت دیفرانسیلی ترموالکتریک منفی و یکسوسازی جریان ترموالکتریکی

نوع مقاله: مقاله پژوهشی کامل

نویسندگان

گروه فیزیک، دانشکده علوم، دانشگاه صنعتی ارومیه، ارومیه، ایران

چکیده

جستجو برای یافتن چشمه های انرژی تجدید پذیر تبدیل به چالش مهمی در پیش روی محققان شده است. در سالهای اخیر ترموالکتریسیته به عنوان یک مولد انرژی الکتریکی پاک و سبز شناخته شده است. پدیدهای ترموالکتریک در رژیم غیرخطی حوزه جدیدی در تحقیقات را تشکیل می دهند که پیش بینی می شود کارآیی ترموالکتریک را افزایش بدهند. به نظر می رسد مواد ترموالکتریک ارگانیک (TM) به دلیل دارا بودن ویژگی های خاص خود، فرصت منحصر به فردی را در توسعه مواد ترموالکتریک تجزیه پذیر زیستی، انعطاف پذیر و هوشمند فراهم می کنند. در این مطالعه، ترموالکتریک غیرخطی مبتنی برنانوملکول دی.ان.آ را توصیف می کنیم. مشاهده می‌شود که با استفاده از اختلاف دما بین منبع و گیرنده، جریان الکتریسیته محسوسی تولید می شود. با تنظیم اختلاف دما، پدیده مقاومت دیفرانسیلی ترموالکتریک منفی (NDTER) را می توان به دست آورد. NDTER به پدیده‌ای اشاره دارد که در آن جریان الکتریکی با افزایش اختلاف دما کاهش می‌یابد. علاوه بر این، با تنظیم تفاوت دما بین مخازن سرد و گرم و تغییر درجه حرارت مخزن داغ، جریانهای بار برای جهت در دو جهت متضاد ΔT متفاوت است. این چیزی است که یکسوساز ترموالکتریک نامیده می شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

The study of thermoelectric effect in the nonlinear response regime: the appearance of negative differential thermoelectric resistance and thermoelectric rectifier in DNA

نویسندگان [English]

  • Robabeh Panahinia
  • Sohrab Behnia
Department of Physics, Faculty of Science, Urmia University of Technology, Urmia, Iran
چکیده [English]

Sources of renewable energy are a major global concern for researchers. In recent years, the thermoelectric power generation from waste heat has appeared as a green and clean energy competitor. Recently, nonlinear thermoelectric phenomena constitute a new area of research, anticipated to enhance thermoelectric response. Organic thermoelectric materials (TM) has been appeared as superior TMs, since they are non-toxic, eco-friendly, and low cost. Herein, bio-organic materials provide a unique opportunity in developing bio-degradable, flexible and smart TM. In this work, we describe nonlinear phonon-thermoelectric DNA based nano devices, driven by temperature biases. Remarkably, we found that by applying a temperature difference between the source and drain, the sensible electric current is generated. The temperature of the hot thermostat and the temperature bias are considered as a control parameter. By modulating the temperature bias, NDTER phenomenon can be achieved. NDTER is referred to a phenomenon in which the charge current decreases by increasing the temperature bias. Moreover, by fixing the temperature bias between cold and hot reservoirs and varying the temperature of hot reservoir, the charge currents are different for the forward and reverse directions of ∆T. This is what called as a thermoelectric rectification.

کلیدواژه‌ها [English]

  • DNA
  • bio-organic thermoelectric
  • Thermoelectric rectification
  • Negative differential thermoelectric resistance

 

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