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Title: Effect of humidity on electrical conductivity of zinc stearate nanofilms
Authors: Öztürk, Serdar
Balköse, Devrim
Okur, Salih
Umemura, Junzo
Öztürk, Serdar
Balköse, Devrim
Okur, Salih
Izmir Institute of Technology. Physics
Izmir Institute of Technology. Chemical Engineering
Keywords: Electrical conductivity
Humidity effect
Langmuir-Blodgett films
Zinc stearate
Nanostructured materials
Carboxylic acids
Issue Date: Jul-2007
Publisher: Elsevier Ltd.
Source: Öztürk, S., Balköse, D., Okur, S., and Umemura, J. (2007). Effect of humidity on electrical conductivity of zinc stearate nanofilms. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 302(1-3), 67-74. doi:10.1016/j.colsurfa.2007.01.039
Abstract: In this work, stearic acid (StAc) and zinc stearate (ZnSt2) nanofilms were deposited on glass and silver substrates using Langmuir-Blodgett (LB) film technique and their structural and electrical properties were investigated. X-ray diffraction and IR techniques revealed that more crystalline and better films were obtained from ZnSt2 compare to StAc. Electrical conductivity of ZnSt2 LB films with 13 layers having 28 nm thickness were measured in the range of humidity of 20-60% and it is seen that the conductivity was very sensitive to relative humidity (RH) above 40% at 25 °C and showed no hysteresis during adsorption and desorption of water vapor. Water vapor adsorption isotherm of ZnSt2 powders was determined and conductivity increase with humidity was attributed to water vapor adsorption. Constant electrical conductivity of the ZnSt2 films at low relative humidities and at low voltage values is an advantageous property which allows using them as organic nanofilms with insulating properties.
ISSN: 0927-7757
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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