Study of particle dynamics and analysis using DDM microscopy

Abstract

In plasmonics and nanophotonics, there are many techniques to study particle dynamics in a heterogeneous sample on a multi-length scale. In this thesis, we work towards making an optothermoelectric trap, and with self-preprepared plasmonic gold and silver nanoparticles and nanorods, attempt to study system dynamics using a revolutionary upcoming technique named Differential Dynamic Microscopy, which not only helps us to investigate the dynamics in spatial dimension but in time as well. We then study their related graphs and Fourier transform images and try to classify and quantify the various diffusive processes occurring in the system and get a picture of the dominating forces under various circumstances and their effects.