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Optical sensors based on the NiPc–CoPc composite films deposited by drop casting and under the action of centrifugal force |
| Noshin Fatima1, Muhammad M Ahmed1, Khasan S Karimov2,3, Zubair Ahmad4, Fahmi Fariq Muhammad5,6 |
1 Department of Electrical Engineering, Capital University of Science and Technology(CUST), Islamabad, 44000, Pakistan;
2 GIK Institute of Engineering Sciences and Technology, Topi, District Swabi, KPK 23640, Pakistan;
3 Center for Innovative Development of Science and New Technologies of Academy of Sciences, Aini 299/2, Dushanbe 734063, Tajikistan;
4 Center for Advanced Materials(CAM), Qatar University, P. O. Box 2713, Doha, Qatar;
5 Center for Composites, Institute for Vehicle Systems & Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia;
6 Soft Materials & Devices Laboratory, Department of Physics, Faculty of Science and Health, Koya University, Danielle Mitterrand Boulevard, Koya 45, Kurdistan Region, Iraq |
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Abstract In this study, solution processed composite films of nickel phthalocyanine (NiPc) and cobalt phthalocyanine (CoPc) are deposited by drop casting and under centrifugal force. The films are deposited on surface-type inter-digitated silver electrodes on ceramic alumina substrates. The effects of illumination on the impedance and capacitance of the NiPc-CoPc composite samples are investigated. The samples deposited under centrifugal force show better conductivity than the samples deposited by drop casting technique. In terms of impedance and capacitance sensitivities the samples fabricated under centrifugal force are more sensitive than the drop casting samples. The values of impedance sensitivity (Sz) are equal to (-1.83) MΩ·cm2/mW and (-5.365) MΩ·cm2/mW for the samples fabricated using drop casting and under centrifugal force, respectively. Similarly, the values of capacitance sensitivity (Sc) are equal to 0.083 pF·cm2/mW and 0.185 pF·cm2/mW for the samples fabricated by drop casting and under centrifugal force. The films deposited using the different procedures could potentially be viable for different operational modes (i.e., conductive or capacitive) of the optical sensors. Both experimental and simulated results are discussed.
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Received: 10 October 2016
Revised: 13 March 2017
Accepted manuscript online:
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PACS:
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07.07.Df
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(Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)
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07.10.Pz
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(Instruments for strain, force, and torque)
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81.05.Lg
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(Polymers and plastics; rubber; synthetic and natural fibers; organometallic and organic materials)
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81.05.U-
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(Carbon/carbon-based materials)
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| Fund: Project supported by the Center for Advanced Materials (CAM), Qatar University, Qatar. |
Corresponding Authors:
Zubair Ahmad
E-mail: zubairtarar@qu.edu.qa
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Cite this article:
Noshin Fatima, Muhammad M Ahmed, Khasan S Karimov, Zubair Ahmad, Fahmi Fariq Muhammad Optical sensors based on the NiPc–CoPc composite films deposited by drop casting and under the action of centrifugal force 2017 Chin. Phys. B 26 060704
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