لایه‌نشانی و ارزیابی خواص اپتیکی و آبگریزی لایه نازک نانوکامپوزیتی MgF2-SiO2

نویسندگان

دانشکده مهندسی مواد، دانشگاه صنعتی مالک اشتر اصفهان

چکیده

در این پژوهش، لایه نازک نانوکامپوزیتی فلورید منیزیم- سیلیکا(دو درصد وزنی)/فلورید منیزیم روی زیرلایه شیشه ­ای اعمال شد. به‌منظور رسیدن به خواص ضد بازتابی، ابتدا لایه ­های نازک فلورید منیزیم با ضخامت اپتیکی روی زیرلایه شیشه ­ای پوشش ­دهی شد و سپس لایه ­نشانی لایه نازک نانوکامپوزیتی MgF2-2%SiO2 صورت گرفت. درنهایت اصلاح ­سازی سطح به‌کمک محلول PFTS انجام شد. مشخصه­ یابی لایه نازک با استفاده از روش‌های پراش­سنجی پرتو ایکس، طیف‌سنجی بازتاب کلی تضعیف ‌شده مادون قرمز با تبدیل فوریه، طیف‌سنجی مرئی- فرابنفش و میکروسکوپی نیروی اتمی انجام شد. همچنین خواص آبگریزی نمونه توسط اندازه‌گیری زاویه تماس آب بررسی شد. نتایج به‌دست‌آمده نشان داد لایه ­نشانی لایه ‌نازک فلورید منیزیم شش لایه بر دو طرف زیر­لایه شیشه ­ای منجر به افزایش عبور تا 4/96 درصد شده است. برای شیشه پوشش داده شده با لایه نازک نانوکامپوزیتی MgF2-2%SiO2، میزان عبور به‌مقدار 4/94 درصد کاهش یافته که نسبت به شیشه خام عبور بالاتری را حاصل کرده است. همچنین آنالیز اندازه‌گیری زاویه تماس آب مشخص کرد که زاویه تماس قطره آب روی شیشه پوشش داده شده با لایه نازک نانوکامپوزیتی MgF2-2%SiO2 کاهش می ­یابد. از طرفی زاویه تماس قطره آب روی شیشه پوشش­ داده­ شده با لایه نازک نانوکامپوزیتی MgF2-2%SiO2 اصلاح شده با PFTS، تا حد 119 درجه افزایش یافت. لذا لایه نازک نانوکامپوزیتی  MgF2-2%SiO2 می­تواند به‌عنوان پوشش ضد بازتاب و خودتمیز شونده روی سطح قطعات اپتیکی مورد استفاده قرار گیرد.

کلیدواژه‌ها


عنوان مقاله [English]

Fabrication of MgF2-SiO2 Nanocomposite Thin Films and Investigation of Their Optical and Hydrophobic Properties

نویسندگان [English]

  • M. Maniei
  • A. Eshaghi
  • A. Aghaei
Department of Materials Engineering, Malek Ashtar University of Technology, Shahin Shahr, Isfahan, Iran.
چکیده [English]

In this research, MgF2-2%SiO2/MgF2 thin films were applied on a glass substrate. At first, MgF2 thin films with the optical thickness were deposited on the glass slide substrates. Then, MgF2-2%SiO2 thin films were deposited on the glass coated with MgF2 thin films. Finally, the nanocomposite thin films were surface treated by the PFTS solution. Characterization of the thin film was done by X-Ray defractometry (XRD), attenuated total reflectance fourier transform infrared spectroscopy (ATR-FTIR), UV-Vis spectroscopy, and atomic force microscopy (AFM) techniques. Also, the hydrophobic properties of the samples were investigated by measuring the contact angle of the water. The results showed that the deposition of the six layer MgF2 thin films on the two sides of the glass substrate increased the transmission up to 96.4%. For the glass deposited by MgF2-2%SiO2 nanocomposite thin films, transmission was reduced to 94.4%,   with its transmission being higher than the pure glass. Also, the water contact angle (WCA) analysis determined that the contact angle of the water droplet on the MgF2-2%SiO2 nanocomposite thin film coated glass was decreased. On the other hand, the contact angle of the water droplet on the MgF2-2%SiO2 nanocomposite thin film coated glass after modification with the PFTS solution was increased up to 119o. So, MgF2-2%SiO2 nanocomposite thin films could be used as an antireflective and self-cleaning coating on the surface of the optical devices.

کلیدواژه‌ها [English]

  • thin film
  • nanocomposite
  • Modification
  • PFTS
  • Optical properties
  • Hydrophobicity
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