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

Year 2019, , 543 - 552, 31.08.2019

Sibel Şen

https://doi.org/10.18185/erzifbed.446029

Abstract

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

Abstract

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.

Keywords

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

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