Characteristics of the polyaniline films vacuum deposited at a high background pressure |
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| Affiliation: | 1. Department of Physics, School of Applied Science, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China;2. Material Research Center, Beijing Institute of Science and Technology, Beijing 100081, China;3. Department of Chemistry, School of Applied Science, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China;1. Division of Social and Behavioral Sciences, Yale School of Public Health, 60 College St., Laboratory for Epidemiology and Public Health, Suite 316, New Haven, CT 06520, United States;2. Department of Sociomedical Sciences, Mailman School of Public Health, Columbia University, United States;3. Department of Psychology, Pace University, United States;1. Mailman School of Public Health, Department of Epidemiology, Columbia University, USA;2. Mailman School of Public Health, Department of Sociomedical Sciences, Columbia University, USA;1. Department of Sociomedical Sciences, Mailman School of Public Health, Columbia University, 722 W. 168th Street, 16th floor, New York, NY 10032, USA;2. Department of Sociology, University of Maryland Energy Research Center (UMERC), College Park, MD 20742, USA;3. Stanford University, Sociology Department, MC 2047, Main Quad – 450 Serra Mall, Building 120, Room 160, Stanford, CA 94305-2047, USA;4. Department of Sociology, Ballantine Hall 744, 1020 Kirkwood Ave, Bloomington, IN 47405, USA;1. Physics Department, College of Science, Jouf University, P.O. Box:2014, Sakaka, Saudi Arabia;2. Physics Department, College of Science, Princess Nourah Bint Abdulrahman University, P.O. Box. 84428, Riyadh 11671, Saudi Arabia;3. Radiation Physics Department, National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority (AEA), Cairo, Egypt;1. I.S.P.R.A.–Istituto Superiore per la Protezione e la Ricerca Ambientale, Via V. Brancati, 48, 00144 Roma, Italy;2. I.N.G.V.–Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata, 605, 00143 Roma, Italy |
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| Abstract: | Polyaniline films with different thickness were deposited on unheated glass substrates by vacuum evaporating HCl-doped polyaniline pellets at a high background pressure. Micromorphological, compositional, structural and electrical properties of the films were studied by using field emission scanning electron microscopy, energy dispersive of X-ray spectroscopy, Fourier transform infrared spectroscope and sub-femtoamp source meter. The polyaniline films consist of a large number of flakes. Some flakes are perpendicular to the substrate and they are more in the thick film compared with the thin film. No chlorine is detected in the films. The aromatic structure of polyaniline is retained in all the polyaniline films. However, the polar structure of polyaniline is destroyed in the films. The polyaniline film is in a higher oxidation state compared with the HCl-doped polyaniline pellet. The conductivity of the polyaniline films ranges from 10−8 to 10−9 S/cm and is lower than that of the HCl-doped polyaniline pellet as the starting material. Besides, the conductivity decreases with increasing film thickness. |
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