Berlin 2015 – scientific programme
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DS: Fachverband Dünne Schichten
DS 36: Poster Session I
DS 36.104: Poster
Thursday, March 19, 2015, 09:30–12:00, Poster A
ZnO Nanostructured Thin Films: Synthesize for Electrochemical Sensor Application — •Ali Jasim Mohammed1 and Gerhard Wilde2 — 1Department of Physics, College of Science, Al-Mustansiriyah University, Baghdad, IRAQ — 2Institute of Material Physics, Westfalisch Wilhelm-University, Wilhelm-Klemm-Str.10, Muenster, GERMANY.
Nanostructured zinc oxide thin films has great interest, our presentation focuses on a simple technique of ZnO thin film synthesization by physical vapor deposition (PVD) and chemical vapor deposition (CVD) to form different types of nanostructures as wires, rods, needles, and discs. The morphologies of these films were investigated by scanning electron microscopy (SEM). The sensing response of the films towards gas and salt solutions detection was studied. Zinc oxide nanowires/nanobelts thin films were prepared by thermal evaporation deposition of Zn on both glass and silicon substrates, namely Cr-glass and Cr-<100> n-type Si. ZnO nanostructured based CO- gas sensing, furthermore the piezoelectrical characteristics employed for detection of sodium and magnesium solutions. As the gas sensing, the sensitivity increased with increasing operating temperature, particularly above 175 oC where it increased by three folds. Typically ZnO nanowires/nanobelts thin film sensor had fast rise times and good recovery times substrates. While, the salt solution sensor had a fast rise time especially for low pulse repetition rate (1 p/s).