Experimental Techniques For The Synthesis And...

CHAPTER 2 EXPERIMENTAL TECHNIQUES FOR THE SYNTHESIS AND CHARACTERIZATION OF NANOMATERIALS. In order to explore novel physical properties and phenomena and realize potential applications of nanostructures and nanomaterials, the ability to fabricate and process nanomaterials and nanostructures is the first corner stone in nanotechnology. There exist a number of methods to synthesize the nanomaterials, which are categorized in two techniques â€Å"top down and bottom up†. Solid state route, ball milling comes in the category of top down approach, while wet chemical routes like sol-gel, co-precipitation, etc. come in the category of bottom up approach. Secondly, characterization of nanomaterials is necessary to analyze their various properties. Therefore, this chapter describes the various methods of synthesis and characterization of nanomaterials. Characterization techniques include XRD, SEM, TEM, EDAX, UV-Visible spectroscopy, FTIR spectroscopy, etc. 2.2. Synthesis of Nanomaterials: Fabrication of nanomaterials with strict control over size, shape, and crystalline structure has become very important for the applications of nanotechnology in numerous fields including catalysis, medicine, and electronics. Synthesis methods for nanoparticles are typically grouped into two categories: â€Å"top-down† and â€Å"bottom-up† approach. The first involves the division of a massive solid into smaller and smaller portions, successively reaching to nanometer size. This approach may involve milling orShow MoreRelatedExperimental Investigation on Zirconium Oxide with Engine Oil 20W401534 Words   |  7 Pagesincreasing availability of methods, synthesis of nanomaterials as well as tools of characterization and manipulation. Nanotechnology makes us to believe that we would have the ability to create anything that we could precisely define. Synthesis of nanomaterials is another key issue. General approaches in synthesizing nanomaterials involve vapour, liquid or solid state routes or their intelligent combinations. Size effects are an essential aspect of nanomaterials. Size effects are of two types: oneRead MoreIs Nanotechnology A Field Of Applied Science?7916 Words   |  32 PagesChapter 1 Introduction 1.1 Background Nanotechnology is a field of applied science, focused on the design, synthesis, characterization and application of materials and devices at the nanoscale. This is an emerging field which plays a major role in the development of innovative methods to produce new products. Because of its greater role in enhancing the performance of several existing technologies, it is gaining high attention. Properties of materials often change dramatically when size reducesRead MorePreparation Of A Innovative Mixed Matrix Polyethersulfone Membranes By Inserting Graphene Oxide Nanosheets For Wastewater Purification Essay1505 Words   |  7 Pagesmembrane to be either hydrophobic or hydrophilic and also change the surface charge of membrane to be either electropositive or electronegative, changing operating conditions, and periodic cleaning . Generally, Ultrafiltration (UF) is a widely used technique in the treatment wastewater.. Asymmetric UF membranes can be prepared using a range of suitable polymers, including polysulfone (PSf), polyethersulfone (PES), poly(aryleneethersulfone) block copolymer, cellulose acetate (CA),polyetherimide(PEI),polyimide(PI)Read MoreThe Doping Of Semiconductor By Rare Earth Metal Nanoparticle1754 Words   |  8 Pagesgel-combustion method. It was found that La can greatly enhance the cytotoxicity and photocatalytic activity of ZnO nanoparticles towards various cell lines and paracetamol drug. These nanoparticles were characterized by various spectroscopic and other techniques which clearly revealed the presence of lanthanum ions. The absorption edge shifts towards the visible region after doping with La ions. This shift shows that the doping of La ions is favorable for absorbing the visible light. The comparative photocatalyticRead MoreTitanium Cerium Ferrite ( Tcf ) Was Prepared By A Simple Solvothermal Method5630 Words   |  23 Pagesfriendly, simple and effective method for uranium (VI) removal from wastewaters. However, the separation process of adsorbents from aqueous solution after saturated sorption is usually complex and time-consuming. To overcome this difficulty, nanomaterials have been concerned among the scientists and researchers because these materials possess high specific surface areas, plentiful functional groups and abundant sorption sites on their surfaces [magnetic graphene/iron oxides]. ManyRead MoreModeling Of Engineering And Biomedical Sciences9738 Words   |  39 Pagesmechanical properties, thermal conductivity and electrically insulating property, boron nitride nanotubes and nanosheets have promising applications in the field of engineering and biomedical sciences. Accurate modeling of failure or fracture in a nanomaterials inherently involves coupling of atomic domains of crack, voids as well as deformation mechanism ori ginating from grain boundaries. This review highlights the recent progress made in the atomistic modeling of boron nitride nanofillers. Continuous