Döner (Spin) Kaplama ile İki Boyutlu Polimerik Nanokompozitlerin Geniş Alanlı Üretimleri

Bu çalışmanın amacı, döner-kaplama tekniği kullanılarak yüksek kristal kalite kolloidal şablonların eldesi ve bu şablonlardan üretilen nanokompozitlerin üretim koşullarının belirlenmesidir. Bu amaçla, hazırlanan akrilat monomeri içerisine homojen dağılmış silika kolloidleri kullanarak çeşitli yüzeyler üzerine döner kaplama tekniği ile cam yüzeyler kaplandı. Merkez kaç kuvvetlerine dayalı bu kaplama tekniği ile yüksek kaliteli nanodizilimler ve polimerizasyon aşamasıyla, iki boyutda kolloidal kristallerin polimer yapıları başarılı bir şekilde hazırlandı. Etanolde, seyreltik silika nanoküreler temizlendikten sonra viskozitesi 60 cps olan etoksile trimetilolpropan triakrilat monomer ile hacimsel fraksiyonları < %20 olacak şekilde çözüldü. Hazırlanan bu kolloidal süspansiyon-monomer karışımı cam yüzeyler üzerine oldukça tek dizilimli olarak kaplandı. Filmin kalınlığı sadece dönüş hızı ve dönüş zamanı değiştirilerek kontrol edilebilmektedir. Polimer matrisinin ve silis kürelerinin seçici olarak uzaklaştırılması, reaktif iyon aşındırıcı ve hidroflorik asit uygulamalarıyla gerçekleştirilmiş olup, sırasıyla geniş alanlı kolloidal kristallerin makro gözenekli polimer şablonları elde edildi. Görünür ve yakın kızılötesi bölgelerdeki normal iletim spektrumları, iki boyutlu bu nanoyapılardan, Bragg kırınımın belirgin tepe noktaları grafiklerle belirlendi. Optik disk ölçekli kaplama işlemlerine dayalı bu teknik, standart yarı iletken mikrofabrikasyonlara ve optik biyosensör üretimine uyumludur. Döner kaplama işleminin, merkez kaç kuvvetine dayalı kristalleşme uygulaması, kaplama tekniklerine dayalı, teknolojik uygulamalarda rahatlıkla kullanılabilmektedir.

Mass Fabrication of Two Dimensional Polymeric Nanocomposites with Spin Coating

The aim of this study is to obtain high crystal quality colloidal templates using spin-coating technique and to determine the production conditions of nanocomposites produced from these templates. For this purpose, the glass surfaces were coated by spin- coating technique on various surfaces using homogeneously dispersed silica colloids in the prepared acrylate monomer. With this coating technique based on centrifugal forces, and following polymerization step, high quality nanoarrays of colloidal crystals in two dimensions were successfully prepared. In ethanol, the dilute silica nanospheres were removed and then dissolved with ethoxylated trimethylolpropane triacrylate monomer having a viscosity of 60 cps to

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