for all the help they provided during my research work. I am very thankful to all my roommates, Dinesh, Vijay, Sachin, Susheel and Naveed who have been my family here and lent me their unconditional support. Last but not the least, I would like to acknowledge my lab mates and my friends at LSU who made my stay memorable and enjoyable. iv TABLE OF CONTENTS DEDICATION ............................................................................... ii ACKNOWLEDGEMENTS

more »

... ............................... iii LIST OF TABLES ...........................................................................vii LIST OF FIGURES ....................................................................... viii LIST OF SYMBOLS ..................................................................... xii ABSTRACT ................................................................................ xv CHAPTER 1. INTRODUCTION ........................................................ 1 1.1 Summary ......................................................................1 1.2 Need for Studying the Morphology of Particulates ......................2 1.3 Measurement Techniques and Methodology ............................ 5 1.4 Proposed Work ...............................................................6 CHAPTER 2. LITERATURE SURVEY ............................................... 8 v CHAPTER 4. EXPERIMENTAL PROCEDURES .................................. 38 4.1 Calibration .................................................................. 4.1.1 Calibration of Ironpentacarbonyl mass flowrate .............. 4.1.2 Calibration of pneumatic actuator system ...................... 4.2 Flames and Temperature Measurements ................................. 4.2.1 The flames ......................................................... 4.2.2 Temperature measurements ...................................... 4.3 Monitoring of Fe(CO) 5 Mass Flow Rate ................................ 4.4 Particle Sampling ........................................................... 4.4.1 Thermophoretic sampling ........................................ 4.5 Electromagnet ............................................................... CHAPTER 5. RESULTS AND DISCUSSION ......................................... 50 5.1 Samples from Thermophoretic Sampling ................................. 5.2 Effect of Magnetic field on Diffusion Flames .......................... 5.3 XPS Analysis ................................................................ 5.4 Analysis of Magnetic Properties of Iron Oxide Nanoparticles using SQUID ............................................................... CHAPTER 6. SUMMARY OF RESULTS .............................................