Growth and Investigation of Group II VI Semiconductor Nanoparticles for Luminescence Based Applications

Abstract

The work presented in the thesis focused on zero-dimensional II-VI newlinesemiconductor-based luminescent materials, including zinc-based un-doped and newlinetransition metals doped/co-doped luminescent nanoparticles. The chapter mainly gives newlinea brief introduction to the nanomaterials and classifications based on the confinement newlineof the system. Also, it introduces 0-D II-VI semiconductor quantum dots, specifically newlinezinc selenide quantum dots (ZnSe QDs) and their properties, as well as focused on newlineimportant applications of these materials in various sensing areas purposes, like newlinehazardous toxic heavy metals, explosive compounds and temperature sensors. newline1.1 Nanomaterials newlinePhysics and chemistry have experienced significant development in the nanometer size newlinerange, leading to a new interdisciplinary field of nanoscience in the last decade. The newlineattention in nanoscale materials increases because many physical phenomena occur at newlinea length scale between 1 and 100 nm in both organic and inorganic materials. newlineNanoparticles are microscopic particles having a dimension below 100 nm at least in newlineone direction. A drastic change in the various properties of materials is observed as newlinenanoscale size is achieved and a significantly high number of loosely bonded atoms newlinepresent at the material surface. Numerous size-dependent properties are detected in newlinenano regime such as super paramagnetism in magnetic substances, quantum newlineconfinement in semiconductor particles and surface plasmon resonance in some metal newlineparticles [1]. newline newline