Nuran AY, Alev AKPINAR BORAZAN, Duygu KURU

Piranha ve Silan Modifikasyonlarının Bor Nitrür Nanosheets (BNNSs) İnce Film Oluşumu Üzerine Etkisi

Bu çalışmada, iki faz arasındaki (cam alt tabaka ve BNNSs filmi) yapışmanın arttırılması amaçlanmıştır. Yüzey iyileştirmesi TEOS silan grubu ve piranha çözeltisi ile sağlanmıştır. Cam yüzeylerin piranha çözeltisinde tutunma süreleri ve silan çözeltisinin farklı oranlarının cam yüzeyine yapışması incelenmiştir. Yüzey karakterizasyonu Fourier Transform Infrared Spektrofotometre (FT-IR) ile yapılmıştır. Yüzey morfolojisini, ince filmlerin kalınlığını ve bor nitrür nanosheetlerin yapısını karakterize etmek için Taramalı Elektron Mikroskobu (SEM) görüntüleri alınmıştır. Eksfoliasyon işleminden sonra bor nitrür nanosheetlerin verimliliğini belirlemek için UV görünür bölge spektrofotometresi kullanılmıştır. İnce filmlerin yüzey pürüzlülüğünü belirlemek için yüzey pürüzlülük cihazı (Time TR200) kullanılmıştır. Sonuçlara göre piranha ve silan çözeltilerinin cam yüzeyini yapışma için geliştirdiği görülmüştür. SEM görüntüleri silanın cam yüzeyinde kaplandığını ve kaplama malzemesinin silan üzerinde tutunduğunu göstermiştir. Silan yüklemesinin fazla olması yapıda bozulmalara neden olmuştur. Eksfoliasyon sonrası farklı santrifüjleme hızları için bor nitrür verimi %54,1 ve %34,1 olarak hesaplanmıştır.

The Effect of Piranha and Silane Modifications on Boron Nitride Nanosheets (BNNSs) Thin Film Formation

In this study, the aim was to increase the adhesion between the two phases (glass substrate and BNNSs film). Surface treatment was provided by TEOS silane group and piranha solution. The retention times of the glass surfaces in the piranha solution and the adherence of different ratios of the silane solution to the glass surface were investigated. Surface characterization was carried out by Fourier Transform Infrared Spectrophotometer (FT-IR). Scanning Electron Microscopy (SEM) images were taken to characterize the surface morphology, the thickness of the thin films and the structure of boron nitride nanosheets. UV visible spectrophotometer was used to determine the efficiency of boron nitride nanosheets after the exfoliation process. Surface roughness tester (Time TR200) was used to determine surface roughness of the thin films. According to the results, it was observed that the piranha and silane solutions improved the adhesion of the glass surface. SEM images showed that the silane was coated on the glass surface and the coating material was retained on the silane. Excess silane loading caused the structure to deteriorate. Boron nitride yield was calculated and found to be 54.1% and 34.1% for different centrifugation rates after exfoliation.

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