Enlarged of Nano-Dimensional Vanilla Thin Films and Surface Plasma Resonance Sensor Performance of these Films

Öz

In order to determine the thin film properties of vanilla, nano-sized thin films were obtained on a suitable substrate using the spin coating method. UV-visible absorption spectroscopy and surface plasma resonance method were used for the characterization of the deposited thin film. Characterization results obtained using these techniques indicated that the vanillin molecules are suitable to transfer onto a gold coated glass or quartz glass substrates. Gas sensing properties and thickness of these thin films were elucidated, using the surface plasmon resonance (SPR) method. Firstly, thicknesses of the vanillin spun films were obtained for different spinning speed and then, the gas sensing properties were examined towards vapours of three volatile organic compounds (VOC’s) (methanol, chloroform, benzene). Compared the results it was determined that, vanilla thin films are selective for the benzene vapour, with rapid response and recovery times. According to these data it was found that, vanilla thin films obtained by spin coating method, could be used for the detection of benzene vapor.

Nano-Boyutlu Vanilya İnce Filmlerin Büyütülmesi ve Yüzey Plazma Rezonansı Sensör Performansı

Öz

Vanilya ince film özelliklerinin belirlenmesi için, uygun bir alt tabaka üzerinde, spin kaplama yöntemi kullanılarak nano boyutta ince filmler büyütülmüştür. Bu ince filmin karakterizasyonu için UV-görünür soğurma spektroskopisi ve yüzey plazma rezonansı kullanılmıştır. Bu teknikler sayesinde elde edilen karakterizasyon sonuçları, vanilya moleküllerinin altın kaplı cam veya kuvars cam alttaşlar üzerine aktarılmaya elverişli olduğunu göstermektedir. Spin kaplama yöntemi ile büyütülen vanilya ince filmlerin gaz algılama özellikleri ve kalınlığı, yüzey plazma rezonansı (SPR) yöntemi kullanılarak incelenmiştir. Öncelikle farklı dönüş hızlarında üretilen ince filmlerin kalınlıkları elde edilmiş ve daha sonra, üç farklı uçucu organik bileşiğin (UOB) (metanol, kloroform, benzen) buharına karşı gaz algılama özellikleri incelenmiştir. Sonuçlar karşılaştırıldığında vanilya ince filmlerinin benzen buharı için seçici olduğu, bu buhara karşı olan tepkisinin ve filmlere hava verildiği zamanki geri dönüşümünün hızlı olduğu tespit edilmiştir. Bu verilere göre spin kaplama yöntemiyle büyütülen vanilya ince filmlerin, benzen buharının tespiti için kullanılabileceği bulunmuştur.

Anahtar Kelimeler

• Spin kaplama yöntemi,Yüzey plazma rezonansı,Gaz ve buhar sensörleri,Vanilya,Benze

Kaynakça

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