AAU-ETD AAU-ETD
 

Addis Ababa University Libraries Electronic Thesis and Dissertations: AAU-ETD! >
Faculty of Science >
Thesis - Physics >

Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/2744

Title: AN OVERVIEW OF SILICON NANOSYSTEMS: STRUCTURAL PROPERTIES AND TECHNOLOGICAL APPLICATIONS
Authors: ZELALEM, ALEMAYEHU
Advisors: Dr. S.K.GHOSHAL
Copyright: Mar-2010
Date Added: 7-May-2012
Abstract: Abstract Low dimensional nanosystems are known to have properties that can be markedly different from their bulk counterparts. For semiconductor crystals such as silicon when the carriers (excitons) are confined in dimensions less than their de Broglie wavelength (typically a few nanometers) quantum mechanical size effects emerge. Advances in the design, synthesis and characterization of nano-materials are expected to provide the unprecedented ability to manipulate matter at the most fundamental level. When the physical dimensions of a device are reduced to the nanometer scale, quantum phenomena become prevalent modifying the optical and electronic properties of the material. This may enable the design and manufacturing of materials with properties tailored for the particular application. This paper examines the unique properties of silicon-based nanocristals that are fundamentally different from those of the bulk crystalline material and make nanoscale silicon attractive for use in a variety of important technological applications such as light emitting devices for potonic application,optical communications, photovoltaic solar cells,for memory devices, optical and electrical properties of nanoscale silicon and several techniques towards developing siliconbased nanostructures using nanotechnology tools are explored. Moreover, the different synthesis methods of silicon nanostructures and the accompanying characterizations of silicon nanocrystals and porous silicon are illustrated briefly. Theoretical analysis of the electronic structures of silicon nanocrystals of small number of atoms using pseudo potential-DFT method is presented. In general, for the last fiften years so many researches and jornals are published on silicon nanosystems,in this work we try to give an overview of the applications properties and dimond cristal structure of elemental silicon.
URI: http://hdl.handle.net/123456789/2744
Appears in:Thesis - Physics

Files in This Item:

File Description SizeFormat
ZELALEM ALEMAYEHU.pdf1.83 MBAdobe PDFView/Open

Items in the AAUL Digital Library are protected by copyright, with all rights reserved, unless otherwise indicated.

 

  Last updated: May 2010. Copyright © Addis Ababa University Libraries - Feedback