• HOME
  • Search & Results
  • Full Text
  • Thesis Details
 
Page: 217
 
Full Screen

  • TITLE
  • QUOTATION
  • DEDICATION
  • CERTIFICATE
  • DECLARATION
  • ACKNOWLEDGEMENT
  • CONTENTS
  • PREFACE
  • I. INTRODUCTION
  • 1.1. Basic picture of polymers
  • 1.1.a. Polymerization
  • 1.2. Mechanism of polymerization
  • 1.3. Preparation of polymer thin films
  • 1.3.a. Preparation of thin films from polymer bulk material
  • 1.3.a.1. Solution casting method
  • 1.3.b.2. Evaporation
  • 1.3.c.3. Sputtering method
  • 1.3.b. Preparation of polymer thin films from the monomer
  • 1.3.b.1. Radiation induced polymerization
  • 1.3.b.2. Pyrolitic method
  • 1.3.c.3. Plasma polymerization
  • 1.3.b.3.a. Role of Ionization in Plasma Polymerization.
  • 1.3.b.3.b. Free radicals in plasma polymerization
  • 1.4. Different methods to produce plasma discharge
  • 1.5. A brief review on electronic properties of polymer thin films Modes of carrier transport in insulating polymer films
  • 1.5.a. Modes of carrier transport in insulating polymer films
  • 1.5.b. Switching phenomena in polymer thin films
  • 1.5.c. Semiconducting and conducting polymer thin films
  • 1.5.d. Dielectric behaviour of polymer thin films
  • 1.5.e. Piezo electric and pyro electric polymer thin films
  • 1.5.f. Photo conductivity and photovoltaic effect in polymer thin films
  • 1.6. Application of polymer thin films
  • 1.7. Aim and scope of present work
  • References
  • II. THEORETICAL ASPECTS
  • 2.1. Electronic states of polymers
  • 2.2. Nature of excited states in polymers
  • 2.3. Ionized states and conducting levels in molecular systems
  • 2.4. Electrical properties of polymers
  • 2.4.a. Electrical conduction in insulating polymers.
  • 2.4.b. Carrier generation and transport processes
  • 2.4.c. Conduction process in M -1- M structures
  • 2.4.c.1. Tunneling
  • 2.4.c.2. Schottky Type conduction process
  • 2.4.c.3. Poole - Frenkel conduction process
  • 2.4.c.4. Space charge limited conduction
  • 2.4.c.5. Hopping conduction
  • 2.5. Dielectric properties in general
  • 2.5.a. Introduction
  • 2.5.a.1. Dielectric relaxation and loss
  • 2.5.b. Various polarization mechanisms
  • 2.5.c. Polarization and dielectric losses in thin films.
  • 2.6. Optical absorption in polymers
  • 2.6.a. Absorption in the UV-Visible Range
  • References
  • III. EXPERIMENTAL TECHNIQUES
  • 3.1. Experimental techniques for the preparation of M -1-M sandwich structures
  • 3.1.a. The radio frequency plasma polymerization setup
  • 3.1.b. Electrode deposition system
  • 3.1.c. Deposition of metal electrodes
  • 3.1.d. Electrical feed throughs
  • 3.2. The procedure
  • 3.3. Fabrication of metal cell for electrical and dielectric measurements
  • 3.4. Methods of measurements
  • 3.4.a. d.c. electrical conductivity measurements
  • 3.4.b. Measurements of dielectric parameters
  • 3.4.c. Film thickness measurement
  • 3.4.c.1. multiple - berm interferometry: (fizeau fringe or equal thickness)
  • 3.4.c.2. Theory
  • 3.4.c.3. Measurement jig
  • 3.4.c.4. Fizeau fringes of equal thickness: measurement
  • 3.5. Experimental method to determine the refractive index n, extinction coefficient k and absorption coefficient α of thin films
  • 3.5.a. Theory of method
  • 3.5.b. Experimental method to determine the absorption coefficient
  • 3.5.c. Experimental method to determine band gap energy
  • 3.5.d. Mode of measurement
  • References
  • IV. PLASMA POLYMERIZED FURAN AND LEMONGRASS OIL THIN FILMS - OPTICAL STUDIES
  • 4.1. Experimental techniques
  • 4.2. Growth rate of polymer film formation
  • 4.3. Infrared absorption studies
  • 4.4. Absorption and transmission studies in the UV - VIS - NIR range
  • 4.5. Results and discussion
  • 4.5.a. Plasma polymerized Polyfurrtn
  • 4.5.a.1. Growth rate
  • 4.5.a.2. Polymerization mechanism and structural aspects
  • 4.5.a.3. Absorption in the UV-VIS range
  • 4.5.a.4. Transmission through the plasma polymer Furan films and determination of the optical constants n & k
  • 4.5.b. Plasma polymerized Lemongrass oil thin film.
  • 4.5.b.1. Growth rate of polymer film deposition.
  • 4.5.b.2. IR spectral Studies
  • 4.5.b.3. Absorption in the UV - VIS is range
  • 4.5.b.4 Transmission through the plasma polymer of Lemongrass oil films and determination of the optical constants n & k.
  • References
  • V. CONDUCTIVITY STUDIES ON PLASMA POLYMERIZED FURAN FILMS
  • 5.1. Experimental details
  • 5.2. Results and discussion
  • 5.2.a. Study of the effect of pyrolisis on plasma polymerized
  • 5.2.b. Mechanism of electrical conduction in plasma polymerized Furan thin films
  • 5.2.c. Temperature effects
  • 5.3. Conclusions
  • References
  • VI. DIELECTRIC PROPERTIES OF PLASMA POLYMERIZED FURAN
  • 6.1. Experimental details
  • 6.2. Results and discussion
  • 6.2.a. Dielectric parameter ε and tans δ: Their dependence on thickness at α fixed frequency 1 KHz
  • 6.2.b. Behaviour of dielectric constant and loss factor in the range of 1 KHz-30 KHz
  • 6.2.c. Bellaviour of ε and tans δ in the frequency range 10 KHz - 1 MHz
  • 6.3. Dielectric properties - Detailed discussion
  • 6.4. Conclusions
  • References
  • VII. CONDUCTION MECHANISM IN PLASMA POLYMERIZED LEMONGRASS OIL FILMS
  • 7.1. Experimental details
  • 7.2. Results and discussion
  • 7.2.a. Current -Voltage characteristics
  • 7.2.b. Temperature effect
  • 7.3. Conclusions
  • References
  • VIII. DIELECTRIC PROPERTIES OF POLYMERIZED LEMONGRASS OIL THIN FILMS
  • 8.1. Experimental details
  • 8.2. Results and discussion
  • 8.2.a. The dielectric parameters ε and tans δ: Their dependence on thickness at a fixed frequency 10 KHz
  • 8.2.b. Behaviour of dielectric constant and loss factor in the range of 3 KHz-30 KHz
  • 8.2.c. Behaviour of dielectric constant and loss factor in the range of 100 KHz-1 MHz
  • 8.2.d. Behaviour of dielectric constant and loss factor in very high frequency range 1 MHz - 10 MHz
  • 8.3. Dielectric properties - A detailed discussion
  • 8.4. Conclusions
  • References
  • IX. EFFECT OF IODINE DOPING IN PLASMA POLYMERIZED FURAN AND LEMONGRASS OIL FILMS
  • 9.1. Experimental details
  • 9.2. Results and discussion
  • 9.2.a. Iodine doped plasma and polymerized Furan films
  • 9.2.a.1. 1R absorption studies
  • 9.2.a.2. Absorption in the UV - VIS range
  • 9.2.a.3. Electrical conductivity study on Iodine doped plasma polymerized Furan film
  • 9.2.b. Iodine doped plasma polymerized Lemongrass oil films
  • 9.2.b.1. IR absorption studies
  • 9.2.b.2. Absorption in the UV - VIS range
  • 9.2.b.3. Electrical conductivity studies on Iodine doped plasma polymerized Lemongrass oil film
  • 9.3. Conclusions
  • References
  • X. CONCLUSIONS