SYNTHESIS AND CHARACTERIZATION OF ORGANIC NANOMATEREALS

Abstract

Organic semiconducting nanomaterial is in high demand owing to their great chemical structure variety and property tunability. In last two decades, small organic molecules based - nanomaterial have been used in wide range of applications such as-sensors and/or detector, surface wettability control, optical waveguide and laser, nanocircuits, bio-imaging and photovoltaic devices due to their great optical, hydrophobic and electronic properties. In order to this pyrene based small organic molecules and their nanostructures have been synthesized by "bottom up approach" (chemical method). Chemical route is easy and cost effective as compare to physical method. This dissertation deals with an easy route of synthesis and characterization of organic nanomaterial. In this pyrene based organic dyes are synthesized and characterized by IR, 'H NMR & '3C NMR. XRD & TGA tests are performed to investigate crystallinity and thermal stability. Solution process (template free method), and capping agent (Cetyl- trimethylammonium bromide) (CTAB) were used for synthesis of their nanostructure and they are characterized by FESEM & fluorescence microscopy. Absorption and emission spectra are recorded to investigate optical properties. Zeta potential is used to find out surface charge on particles & cyclic voltammetry is used to find out band gap of the dyes. Their characterization shows good optical and electronic properties that are useful for optoelectronic device application. Owing to these good properties, thin film of organic dye on glass substrate have been prepared and characterized by AFM and surface prolilometer to investigate surface roughness and film thickness.