characterization of multiphase materials

... Nanomaterials for Nanoscience and Nanotechnology Zhong Lin Wang 1.1 1.2 1.3 Why nanomaterials? Characterization of nanophase materials Scope of the book References 10 X-ray Characterization of ... projection of m onto the sample plane scattering angle temporal phase angle Bragg diffraction angle density of quartz density of states of sample local density of states of the sample density of states ... the impacts of nanomaterials in nanoscience and nanotechnology and answer the question of why nanomaterials is so special, this chapter reviews some of the unique properties of nanomaterials,...

Ngày tải lên: 04/06/2014, 14:52

... the impacts of nanomaterials in nanoscience and nanotechnology and answer the question of why nanomaterials is so special, this chapter reviews some of the unique properties of nanomaterials, ... limits of accuracy [2] X-ray Characterization of Nanoparticles 27 2.4.2.1 Special features of EXAFS in nanoparticle systems The wide use of EXAFS in materials research has led to the development of ... and movement of dislocations are important factors that determine the mechanical properties of the nanostructured materials One of the most important applications of nanostructured materials is...

Ngày tải lên: 27/06/2014, 06:20

... thesis of Daniel Thomas Welna was reviewed and approved* by the following: Harry R Allcock Evan Pugh Professor of Chemistry Thesis Advisor Chair of Committee Karl T Mueller Associate Professor of ... Lecturer in Chemistry James P Runt Professor of Polymer Science Associate Head for Graduate Studies Ayusman Sen Professor of Chemistry Head of the Department of Chemistry *Signatures are on file ... electrostatic spinning of a polymeric ceramic precursor to produce a nanofiberous mat, which upon pyrolysis yield boron carbide nanofibers Chapter describes the synthesis and characterization of novel single...

Ngày tải lên: 13/11/2014, 11:13

... enormous amount of credit belongs to a multitude of people for making this research successful First of all, I would like to thank my supervisor, Prof Chan Sze On Hardy of Department of Chemistry ... Formation of the colloidal dispersion of PANI-CS nanoparticles…… 39 2.3.2 Morphologies and formation mechanism of the PANI-CS nanoparticle41 2.3.3 Effect of reaction parameters on the size of PANI-CS ... Formation Mechanism of PPy-CS nanoparticles….67 3.3.3 Effect of Reaction Parameters on the Size of PPy-CS Nanoparticles….73 3.3.4 Effect of Reaction Parameters on the Colloidal Stability of PPy-CS Dispersion………………………………………………………………74...

Ngày tải lên: 15/09/2015, 17:10

... MACROSCOPIC CHARACTERIZATION OF COMPOSITE MATERIALS QIU CHENGWEI B ENG., UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA, 2003 A DISSERTATION SUBMITTED FOR THE JOINT DEGREE OF DOCTOR OF PHILOSOPHY ... intensity of the plasmonic rod of k0 a = 0.1 and r = −1 in the cases of first two terms 40 2.17 The energy intensity of the plasmonic rod of k0 a = 0.1 and r = −1 in the case of ... whose set of performance characteristics is greater than that of the components taken separately The properties of composite materials result from the properties of the constituent materials, ...

Ngày tải lên: 30/09/2015, 06:38

... subject of the thesis: “Study on synthesis and characterization of new materials based nanostructures of graphene applied in environmental treatment” Objectives of the thesis Synthesis and characterization ... purpose of saving energy, the results of XRD and FTIR give 600 oC as the best temperature for reduction The yield of this process is in the range of 50 - 60% 3.2 The characterization of synthesized ... and As(V) 15 3.6.1 The adsorption ability of GOVS, GOSA and rGO for RR195 3.6.1.1 The effect of pH The effect of pH on the adsoprtion capacity of these materials for RR195 is illustrated in picture...

Ngày tải lên: 28/04/2016, 17:48

... present the mesoscopic model of biological protein materials composed of protein crystals prescribed by Go potential for characterization of elastic behavior of protein materials Specifically, we ... better than that of Kevlar.6 This highlights that understanding of mechanical behavior of protein materials such as spider silk may provide the key concept for design of biomimetic materials, and ... materials, and that mechanical characterization of protein materials may allow for gaining insight into the biological functions of mechanical proteins Mechanical characterization of biological molecules...

Ngày tải lên: 22/02/2014, 08:20

... learned of the high T, materials, no chemist could possibly avoid searching for superconductivity in newly synthesized conducting materials But that is not so About 90% of the interesting materials ... structural and chemical characterization, and chemistry-structureproperty relations of these fascinating materials This book has in large part been written by members of that subspecies of inorganic chemistry ... several of the Physics journals The theoretical aspects of superconductivity will also be omitted, as well as the practical application and engineering aspects of these new materials 4 Chemistry of...

Ngày tải lên: 09/05/2014, 17:09

... Particle size of fly ash with milling time (in hours) Table Surface energy and work of adhesion of fresh as well as ball milled fly ash Fly ash sample Fig Variation of Specific surface area of fly ash ... free energy of a particle gives an estimate of its surface reactivity Fowkes [12] proposed a relation based on the surface energy of the material in its pure phase (ca), which is a sum of the contribution ... analysis the overall composition of fly ash obtained for this study consists of major proportion of SiO2, Al2O3 and Fe2O3, which seems up to 97.42% More over the percentage of calcium oxide, which is...

Ngày tải lên: 22/06/2014, 18:20

... and Characterization of BiTaO4 Log frequency (Hz) Figure 8: Imaginary part of impedance as a function of frequency for BiTaO4 at various temperatures Figure shows the plots of real part of complex ... dispersion of Z'' as a function of frequency is shown in Figure The maxima of the curves shift towards higher frequency region with the increase of measuring temperature; this indicates the presence of ... the bulk (grain) property of the material arising due to the parallel combination of bulk resistance (Rb) and bulk capacitance (Cb) of the material The capacitance of the sample is about 6.2794...

Ngày tải lên: 07/08/2014, 14:20

... manageable iii Table of Contents List of Tables x List of Figures xi List of publications xvii CHAPTER : Introduction 1.1 Overview of today’s solar ... properties of the c-Si wafer and of the a-Si and µc-Si thin-film layers, based on [127] as well as on the fitting of the lifetime samples of Figure 4.4 The activation energy (i.e position of the ... Schematic of a one-dimensional photonic crystal (‘distributed Bragg reflector’, DBR) The DBR consists of several DBR unit blocks Each DBR unit block consists of alternating layers of two materials...

Ngày tải lên: 09/09/2015, 11:15

... intrinsic anisotropy of CoFe2O4 materials As mentioned above, the large magnetocrystalline anisotropy of CoFe2O4 materials arises from the incomplete quenching of orbital momentum of Co2+ which results ... ions of CoFe2O4 materials, we have tried to elucidate the effects of the site occupations on the magnetocrystalline anisotropies and magnetic properties of well crystallized CoFe2O4 powdered materials ... magnetic properties of CoFe2O4 powdered materials; (Chapter 3) (iii) To explore the feasibility of the introduction of high-level strain and highdensity defects in CoFe2O4 powdered materials by mechanical...

Ngày tải lên: 11/09/2015, 09:10

... strain-decomposition 12 12 1-4 Schematic of D-N method 16 2-1 Schematic representation of MTS NANO Indenter XP 34 2-2 (a) Loading profile of the indentation creep test (b) Loading profile of the indentation relaxation ... Loading profile of the linear loading & unloading test without a holding segment (d) Loading profile of the linear loading & unloading test with a holding segment (e) Loading profile of the five-step ... deviatoric deformation of polymeric materials 42 3-2 Flowchart of the inverse analysis using GA 49 3-3 Fitting curves of PMMA 50 3-4 Fitting curves of PET 50 3-5 Fitting curves of epoxy 51 3-6 Comparison...

Ngày tải lên: 12/09/2015, 09:59

... supports and understanding over the years I TABLE OF CONTENTS Page ACKNOWLEDGEMENTS TABLE OF CONTENTS ABSTRACT LIST OF TABLES LIST OF FIGURES LIST OF SYMBOLS CHAPTER Introduction I II VI VIII IX ... characteristics of the pulse used for the tests 51 Figure 2.9: Stability of the Al/PF8Eu/ITO device in either ON- or OFF-state under a constant stress of V 52 Figure 2.10: Cyclic voltammetry (CyV) of a ... (n-doping) processes of the carbazole groups and Eu complex moieties in copolymer PKEu 73 Figure 3.8: Effect of read cycles on the ON state and OFF state 75 Figure 3.9: Ratio of the ON- to OFF-state current...

Ngày tải lên: 12/09/2015, 11:29

... bromination of hydroquinone was achieved using a standard procedure.3 In the case of C12PPPC11OH, monoalkylation of was done using 1.0 equiv of dibromohydroquinone and 0.9 equiv of alkyl bromide ... hydroquinone and 1.5 equivalents of 11-bromo undecanol in presence of a weak base, potassium carbonate The crude product was reprecipitated from a mixture of 1:4 chloroform and methanol The aliphatic ... middle of the trough Two barriers compress or expand symmetrically at the same rate from two sides of the trough Monolayers were obtained by spreading 100-150 μL of the polymer in chloroform with...

Ngày tải lên: 14/09/2015, 18:36

... to control the size, shape and function of inorganic materials with controlled dimensions The adoption and manipulation of the synthesis of inorganic materials using artificial or natural templates ... Synthesis and Characterization of Luminescent Conjugated Polymer-Silica Composite Spheres 5.1 Introduction The incorporation of conjugated polymers into an inorganic matrix and the development of organic-inorganic ... interesting nanostructured inorganic materials. 14-24 The elegant demonstration of silica condensation using silicatein 147 Synthesis and Characterization of Luminescent Conjugated Polymer-Silica...

Ngày tải lên: 14/09/2015, 18:37

... 10 15 20 25 Number of layers Figure 4.5 Absorption spectra of LB films of C6PPPC5Cb with different number of layers (A) and the dependence of the film absorption on the number of transferred layers ... 40 Δθ/deg (B) 10 15 20 Number of layers 25 Figure 4.6 SPR curves of the multilayers of C6PPPC5Cb (A) and plot of the shift of the resonance minimum for LBK films of C6PPPC5Cb obtained from the ... cross-linking of 20 layers (A) layers (B) of LB film and spin coated (C) of C6PPPC5Cb at scan rate of 100 mv/s (D), (E)and (F) are the corresponding precursor polymer free scan Cyclic voltagram of the...

Ngày tải lên: 14/09/2015, 18:37

... dependence of mobility The observed results showed negative field dependent values of the drift mobility for C12PPPOH by TOF measurements 104 Photophysical Properties of a New Class of Amphiphilic ... Properties of a New Class of Amphiphilic poly(p-phenylene)s groups The electrochemical studies revealed that oxidation potential of C6PPPOH was higher than that of C12PPPOH and C18PPPOH The band gap of ... from absorption onset of the 107 Photophysical Properties of a New Class of Amphiphilic poly(p-phenylene)s polymers The charge carrier mobility by the time of flight (TOF) technique showed negative...

Ngày tải lên: 14/09/2015, 18:37

... Formation of Planar Amphiphilic poly(p-phenylene)s Δθ/deg (C) Δθ/deg 10 15 Number of layers 1.4 1.2 0.8 0.6 0.4 0.2 20 (D) 10 15 20 Number of layers Figure 2.7 SPR curves of the multilayers of C6PPPOH ... Figure 2.1 Molecular structure of CnPPPOH polymers 2.2 Results and discussion 2.2.1 Synthesis and characterization of the polymer C6PPPOH, C12PPPOH and C18PPPOH A series of amphiphilic PPPs, C6PPPOH, ... spectra of the polymers CnPPPOH in chloroform solution 2.2.2 LS and LB film deposition and characterization In general, conjugated polymers with tunable emission wavelengths in a wide range of color...

Ngày tải lên: 14/09/2015, 18:38

... presence of flexible alkyl chains The length and the degree of branching of the alkyl chains plays a crucial role by strongly influencing the solubility of the molecule and the thermal transitions of ... consists of six chapters including the above discussed detailed summary of PPPs and its various aspects Chapter describes the investigation of an optimum chemical structure of a homologous series of ... poly(p-phenylene)s, CnPPPOH Some of the important features of this chapter are • Comparison of optical properties of the polymers in solution and thin film • Investigation of quantum yield for the polymers...

Ngày tải lên: 14/09/2015, 18:38