Study of the Effect of Annealing Temperature on the Structural and Electrical Properties of Zinc Oxide Nanofilms Deposited by Pulsed Laser Technology for the Manufacture of Freon Gas Sensor R410a (CHF2 CH3/F2 CH2)
Keywords:
Zinc Oxide Nanofilms; pulsed LASER; sensors; higher technologyAbstract
Zinc oxide (ZnO) nanomembranes were prepared by pulsed laser deposition technique (PLD), the membrane deposition occurred through the interaction between the falling laser rays with the atoms of the target material, then the plasma state inside the sedimentation chamber is formed upwards towards the sedimentation bases installed higher than the disk (target) at a distance of 20 mm, and the vacuum pressure (10-3) mbar The membranes are deposited and grow on the surface of the quartz base so that the distance between the target material and the laser rays is (150 mm), with a annealing temperature of different values (550, 750, 950) °C and a time of two hours on quartz slices, the effect of annealing temperature change on structural properties, surface topography and electrical was studied using XRD, AFM, SIM, Hall effect testers, gas sensor devices, this is for the purpose of knowing the nature of the surface of the prepared membrane and observing the change in granular size with increasing annealing temperatures after sedimentation, it was found that the average grain size (42.16) nm, the scanning electron microscopy examination showed that the grain size increases with increasing annealing temperature, that the structures are all nano, and that the elements that make up the membrane are zinc and oxygen, which were illustrated by the X-ray energy dispersion spectroscopy (EDX). Tests of the Hall effect phenomenon of the samples showed that they are n-type and that conductivity, Hall modulus and electrical mobility increase with increasing annealing temperature, the continuous conductivity test (D.C) showed that the electrical conductivity increases with the temperature of annealing and that the activation energy increases in order with the temperature change within the range (90-180) °C more than within the range (30-90) °C, the results of the examination of the gas sensor with different operating temperature showed that the best value of sensing in plasticized samples with a temperature of 750 °C, which is typical samples, as a sensor layer was formed that appears to be active, where the conductivity changes when exposed to gas.
Downloads
References
A.Tribble, (2002) “Electrical Engineering
Materials and Devices” University of Lowa .
Hamida E. S., Hanaa A. A.,& Mayes -1
A.K.(2019). Adsorption Study Of the
Interaction Between Zinc Oxide
Nanoparticles with Albumin And
Creatinine. College of Education for pure
Science, University of Karbala.
Noor, H. A., Mohamed, H., & Nehad, A. A.
(2017). Preparation and Surface
Modification of Zinc Oxide Nanoparticles.
Journal of Babylon University, 25, 497503.
Chen, W. J., Liu, W.L., Hsieh, S. H., & Tsai,
T. K. (2007). Preparation of nanosized
ZnO using α brass. Applied Surface
Science, 253(16), 6749-6753.
H.Salah Saaba , (2005) "study of the electrical
and optical properties for GaSe4,
GeSe4Te thin films" M .ScThesis
university of Al-Mustansiriyah,
Te. Al.Aswad , (2010) "study the effect of
Doping by cobalt on the some physics ).
Properties of (cds) thin films" M.Sc
.Thesis university of Tikrit,.
R.Eason , (2007). "pulsed laser Deposition of
thin films Application-led growth of
function materials ",Johnwiley & sons,
C. Phipps(2007)." laser Ablation and its
Application " ,New Maxico Springer
R.Lynn Johnson, (2012). "characterization of
piezoelectric ZnO thin films an the Fabrication
of piezoelectric micro-cantilevers", M.Se,
thesis, Iowa state university of Tikret,
A. H.Omran Alkhayattl , I.A.Dishar Alhessians ,O.A. chichan Alrikaby (2014).
"Annealing Effect on the Structural and
Optical Properties of sol-gel Deposited
Nanocrystalline CdO Thin Films" Vol.34,
P.Sagar , M.Kumar ,R.M. Mehra (2005)
"Electrical and optical properties of solGel derived ZnO-Al thin films "Materials
science –poland , 23.3. 685-696.12
Ali ،H. M. ،& Hakeem ،A. M. A. (2015).
Characterization of n and p-type(SnO2) x
(ZnO) 1-x nanoparticles thin films. The
European Physical Journal Applied
Physics ،72(1) ، 10301.
Z. Bi-Ju, LIAN Jian-She, Zhao Lei, Jiang
Qing (2008) “Optical and Electrical
Properties of ZnO/CdO Composite Thin
Films Prepared by Pulse Laser
Deposition” Chin. Phys. Lett., 1, 016801.
Joishy ,Sumanth , et al. (2019) "Influence of
solution molarity on structure, surface
morphology , non-liner optical and
electric properties of CdO thin films
prepared by spray pyrolysis technique."
Materials Research Express 6.10: 106447.
A. J. Aljabiry , (2007). "studying the effect of
molarity on the physical and sensing
properties if ZnO thin films prepared by
spray pyrolysis technique, " M. Sc . Thesis,
University of Technology.
Sun ،Y. F. ،Liu ،S. B. ،Meng ،F. L. ،Liu ،J.
Y. ،Jin ،Z. ،Kong ،L. T. ،& Liu ،J. H.
(2012). Metal oxide nanostructures and
their gas sensing properties: a review.
Sensors ،12(3) ،2610-2631.
Downloads
Published
Issue
Section
License
You are free to:
- Share — copy and redistribute the material in any medium or format for any purpose, even commercially.
- Adapt — remix, transform, and build upon the material for any purpose, even commercially.
- The licensor cannot revoke these freedoms as long as you follow the license terms.
Under the following terms:
- Attribution — You must give appropriate credit , provide a link to the license, and indicate if changes were made . You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
Notices:
You do not have to comply with the license for elements of the material in the public domain or where your use is permitted by an applicable exception or limitation .
No warranties are given. The license may not give you all of the permissions necessary for your intended use. For example, other rights such as publicity, privacy, or moral rights may limit how you use the material.
