Production and Characterization of Nanoparticle ZnO Thin Film by Using Black Tea (Camellia sinensis) Aqueous Extract

Yıl 2018, Cilt: 8 Sayı: 4, 163 - 170, 30.12.2018

HAKAN Çolak

https://doi.org/10.21597/jist.409028

Öz

Nanotechnology is an important field of research in materials science. In particular, the production

of nanostructured materials via environmentally friendly methods has become even more important for

nanotechnology. Zinc oxide (ZnO) is one of the few materials that stand out for nanotechnology. In this study, ZnO

nanoparticles were produced using black tea (Camellia sinensis) aqueous extract and coated on a glass substrate

by a spin coating system. X-ray diffraction (XRD) system was used to characterize the produced ZnO sample and

determine its crystal properties. The average crystal size of ZnO sample was calculated to be 44 nm from XRD

results. Morphological properties of produced ZnO sample was examined by field emission-scanning electron

microscopy (FE-SEM) and the average particle size was measured as about 100 nm. The optical properties of the

produced ZnO sample were investigated by ultraviolet-visible region (UV-VIS) spectrophotometer and optical

transparency was over 90 % in the range of 300 to 1000 nm. The electrical conductivity values of the produced

ZnO sample were measured by four probe dc system, and determined to be 1.65*10-8 and 1.26*10-6 Ω-1.cm-1 at the

measurement temperatures of 35 and 550 °C, respectively.

Anahtar Kelimeler

Nanomaterials, ZnO, black tea (Camellia sinensis), green synthesis metod

Siyah Çay (Camellia sinensis) Sulu Ekstraktı Kullanılarak Nanotanecikli ZnO İnce Filminin Üretilmesi ve Karakterize Edilmesi

Öz

Nanoteknoloji, malzeme biliminin önemli bir araştırma alanıdır. Özellikle, çevre dostu yöntemler

kullanılarak nanoyapılı malzemelerin üretilmesi nanoteknoloji için daha da önemli hale gelmiştir. Çinko oksit

(ZnO) nanoteknoloji için öne çıkan malzemeden bir tanesidir. Bu çalışmada, siyah çayın (Camellia sinensis) sulu

ekstraktı kullanılarak ZnO nanotanecikleri üretildi ve döndürerek kaplama sistemi ile bir cam altlık üzerine ince

film olarak kaplandı. Üretilen ZnO örneğinin tanımlanması ve kristal özelliklerinin belirlenmesi x-ışını difraksiyonu

(XRD) ile gerçekleştirildi. XRD verilerinden ZnO örneğinin ortalama kristal boyutu 44 nm olarak hesaplandı. ZnO

örneğinin morfolojik özellikleri alan emisyonlu-taramalı elektron mikroskobu (FE-SEM) ile incelendi ve ortalama

tanecik boyutu yaklaşık 100 nm olarak ölçüldü. Üretilen ZnO örneğinin optik özellikleri mor ötesi-görünür bölge

(UV-VIS) spektrofotometresi ile incelendi ve 350-1000 nm dalgaboyu aralığında % 90 üzerinde optik geçirgenlik

gözlendi. Üretilen ZnO örneğinin elektriksel iletkenlik değerleri dört nokta dc sistemi ile ölçüldü ve sırasıyla 35 ve

550 °C ölçüm sıcaklıklarında 1.65*10-8 ve 1.26*10-6 Ω-1.cm-1 olarak belirlendi.

Anahtar Kelimeler

Nanomalzemeler, ZnO, siyah çay (Camellia sinensis), yeşil sentez yöntemi, yeşil sentez yöntemi

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