Biyosentez yöntemi ile üretilen GO: Se nanopartiküllerinin üretimi ve karakterizasyonu ve GO: Se nanopartikülleri kullanılarak geliştirilen Ag / GO: Se / p-Si cihazının akım-gerilim özellikleri

Son zamanlarda, nanopartiküllerin üretiminde kullanılan bilinen yöntemlerin yanı sıra yeşil sentez yönteminin kullanılması araştırmacılar tarafından büyük ilgi görmüştür. Bu çalışmada ilk kez literatürde, karanlık koşullar altında Luria-Bertani OG1 besiyerinde özel bir bakteri kullanarak yeni bir yeşil sentez yöntemi yaklaşımıyla selen katkılı grafen oksit nanoparçacıklarının (GO: Se-NPs) üretilmesi sağlandı. Bu işlemden sonra biyosentezlenmiş GO: Se-NPs solisyonu elde edildi. Bu çözelti p-Si altlık üzerine damlatıldı ve tavlama ile GO: Se ince filmi oluşturuldu. İnce film numunelerinin karakterizasyonu, ultraviyole görünür spektrofotometre (UV-VIS), X-ışını difraksiyonu (XRD), alan emisyon taramalı elektron mikroskobu (FE-SEM) ile beraber olan enerji dağılımlı X-ışını spektroskopisi (EDS) teknikleri kullanılarak yapıldı. UV-VIS ölçümleri, GO: Se ince filminin bant aralık enerjisinin (1.70 eV) olduğu ortaya konmuş ve bu değer ilk kez bu çalışma ile literature girmiştir. XRD ölçümlerinde GO: Se / p-Si yapısının çok kristalli bir yapıya sahip olduğu görülmüştür. Diğer taraftan, FE-SEM görüntüsü ise nanometre ölçeğine sahip tabakalı ve kristal yapıların oldukça düzenli ve homojen bir şekilde dağıldıklarını göstermektedir. Öte yandan, akım- gerilimi (I-V) ölçümleri, Ag doğrultucu ve Al omik kontaklı GO: Se / p-Si hetero-yapısının bir diyot davranışı gösterdiğini kanıtlamıştır.

Production and characterization of GO:Se nanoparticles produced by biosynthesis method and current-voltage characteristics of the Ag/GO: Se/p-Si device developed by using GO:Se nanoparticles

Recently, nanoparticle production through the use of green synthesis method as well as the known methods used in the production ofnanoparticles has attracted a great deal of interest by researchers. In this recent research, it was first, achieved to produce grapheneoxide: selenium nanoparticles (GO: Se-NPs) employing a new approach of green synthesis method using special bacteria OG1 in LuriaBertani medium under dark conditions in literature. Applying this method, biosynthesized GO: Se-NPs solution was obtained. GO: Sethin film was formed dropping this solution on the p-Si substrate, and then it was annealed. Optical, structural, morphological, chemicalcomposision properties of GO: Se nanostructural thin film was determined by commonly preferred as UV-VIS, XRD, and FE-SEMwith EDS techniques. UV-VIS measurements showed that the band gap energy, Eg, of the GO: Se thin film is 1.70 eV and this value isfirstly determined with this study in literature. XRD measurements revealed that GO: Se/p-Si structure has a particle nano sizepolycrystal structure. FE-SEM measurements have indicated that GO: Se thin film has a typically nano sheeted structure and distributionof the grains which are very homogeneous and uniform. Furthermore, Current-Voltage (I-V) measurements proved that GO: Se/p-Siheterostructure with rectifying contact of Ag and ohmic contact of Al exhibits a diode characteristic behavior.

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