optical and physical properties of materials
PREDICTION OF CHEMICAL REACTIVITY PARAMETERS AND PHYSICAL PROPERTIES OF ORGANIC COMPOUNDS FROM MOLECULAR STRUCTURE USING SPARC pptx
... properties to Program Offices (e.g., Office of Water, Office of Solid Waste and Emergency Response, Office of Prevention, Pesticides and Toxic Substances) and Regional Offices Also, SPARC has been used ... databases The strength of the electrostatic interaction between S and C depends on the magnitude and relative orientation of the local fields of S and C and the dielectric properties and distances through ... Effect 3.4.3.3 Temperature Effect 3.4.4 Results and Discussions 3.4.5 Conclusion PHYSICAL PROPERTIES 4.1 Estimation of Physical Properties 4.2 Physical Properties Computational Approach 4.3 SPARC...
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Báo cáo hóa học: " Structural and physical properties of antibacterial Ag-doped nano-hydroxyapatite synthesized at 100°C" pptx
... image and EDAX (Figure 4) spectrum of Ca10-xAgx(PO4)6(OH)2, with x = and 0.2, are shown The morphology of the nanoparticles of HAp and Ag: HAp was investigated by SEM SEM images provide the Page of ... results of XRD and TEM, the FTIR and FT-Raman spectra of the HAp show the absorption bands characteristic of hydroxyapatite XPS results provide the additional evidence for the successful doping of ... and composition of the samples Figure shows the survey XPS narrow scan spectra of Ag:HAp (x = 0.2) nanopowder obtained at 100°C and XPS narrow scan spectra of Ag element In the XPS spectrum of...
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FINGERPRINTS IN THE OPTICAL AND TRANSPORT PROPERTIES OF QUANTUM DOTS ppt
... Section Optical Properties of Quantum Dot Systems Chapter InAs Quantum Dots of Engineered Height for Fabrication of Broadband Superluminescent Diodes S Haffouz and P.J Barrios Chapter Influence of Optical ... 77K of single layers of InAs QDs of different areal densities, capped with 100nm GaAs layers 14 Fingerprints in the Optical and Transport Properties of Quantum Dots 4.3 Height engineering of ... Variation of the emission spectra bandwidth and its corresponding peak wavelength as a function of the injection current The waveguide is 1mm long and with tilted () and tapered () angles of 8and...
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Synthesis and Physical Properties of Polyester Amides Derived from Lipid-Based Components
... effects of crystallinity on the physical properties of the PEAs Prepare a PEA with an ester to amide ratio of 4:1 in order to model the trend observed in the physical properties versus ester to ... al., Journal of Biomaterials Science-Polymer Edition, 2007 18(6): p 673-685 Guo, K and C.C Chu, Journal of Polymer Science Part a-Polymer Chemistry, 2005 43(17): p 3932-3944 Advantage of Lipid-based ... based materials References: Hojabri, L., X.H Kong, and S.S Narine, Biomacromolecules, 2009 10(4): p 884-891 Williams, C.K and M.A Hillmyer, Polymer Reviews, 2008 48(1): p 1-10 Previous Examples of...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 1 doc
... Conductivity of Metals? • Drude model: Sea of electrons – all electrons are bound to ion atom cores except valence electrons – ignore cores – electron gas Schematic model of a crystal of sodium ... R=V/I; σ=E/j=neµ) Ohms/square ⇒ Note, if L=W, then R= ρ /t independent of magnitude of L and W Useful for working with films of thickness, t R R R 3.225 © H.L Tuller-2001 17 How to Make Resistance ... from electric force on electron! 3.225 © E.A Fitzgerald-1999 Equation of Motion - Impact of Collisions Assume: • probability of collision in time dt = dt/τ • time varying field F(t) v(t+dt) = (1-...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 5 ppt
... Fermi level is approximately in the middle of the band gap • The law of mass action describes the electron and hole populations, since the total number of electron states is fixed in the system ... E F = m* * + kbT ln h me Eg Since me* and mh* are close and in the ln term, the Fermi level sits about in the center of the band gap ( ) − Eg k T 2 * * p or n = ni = 2 b me ... the barrier NCNV is the density of the reactants, and n and p are the products N C NV → e′ + h • Eg − Eg n np =ekT = i N C NV N C NV b • • • Thus, a method of changing the electron or hole...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 10 pps
... capable of sensing a change in environment and responding without need for a microprocessor A device has both gas sensing and actuating function by integration of semiconducting oxide and piezoelectric ... Electrode ∆f Resonator Electrode 3.225 © H.L Tuller-2001 23 Choice of Piezoelectric Materials • Temperature limitations of piezoelectric materials Material Max Operating Limitations o Temperature ( ... Micromachining - Application of microfabrication tools, e.g lithography, thin film deposition, etching (dry, wet), bonding 3.225 © H.L Tuller-2001 12 Gas Sensors and MEMS • Miniaturization •...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 9 pps
... (Najafi and Hetke, IEEE Trans Biomed Eng 37, 474 (1990).) 3.225 28 14 Measurement of Gas Sensor Performance • Gas sensing materials: Sputtered ZnO film (150 nm (Massachusetts Institute of Technology) ... stability … 3.225 23 Sensor Materials Chemical Environmental Stimulus Gas Sensor Electrical Signal compatible with Microprocessor System Requirements of Gas Sensor Materials • • • • • • • • 3.225 ... film (150 nm (Massachusetts Institute of Technology) Sputtered SnO2 film (60 nm) (Fraunhofer Institute of Physical Measurement Techniques) • Target gases: Electrical Measurement H2, CO, NH3, NO2...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 3 pot
... , z )ψ = − i ∂t 2m ψ and ∆ ψ must be finite, continuous and single valued ψψ * real with ψψ *dV = probability of finding particle in volume dV Average or expectation value of variable α = ∫ ψ ... *α op ψ dV v 3.225 © H.L Tuller-2001 19 Time and Spatial Dependence of ψ Assume ψ (x,y,z,t) separable into ψ(x,y,z) and φ(t) Applying separation of variables: − h ∇ 2ψ h ∂φ +V = − =ε 2m ψ i φ ... determined by the crystal structure and valence n determines the energy and velocity of the highest occupied electron state at T=0 3.225 © E Fitzgerald-1999 Representation of E,k for 2-D Material E= h...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 6 pps
... achieved where diffusive flux of the carriers is balanced by the drift flux 3.225 © E Fitzgerald-1999 12 Joining p and n p n Ec EF Ev Carriers flow under driving force of diffusion until EF is flat ... Qualitative Effect of Bias • • • Applying a potential to the ends of a diode does NOT increase current through drift The applied voltage upsets the steady-state balance between drift and diffusion, ... Means to Create Internal Potentials: Heterojunctions • Different semiconductor materials have different band gaps and electron affinity/work functions Internal fields from doping p-n must be superimposed...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 8 pdf
... of a chromium atom (A) and a trivalent chromium ion (B) 3.225 © H.L Tuller, 2001 10 Octahedral Environment of Transition Metal Ion Interaction of the d orbitals of a central ion with six ligands ... Fitzgerald-1999 Characteristics of Optical Fiber 3.225 Colors Produced by Chromium Above: alexandrite, emerald, and ruby Center: carbonate, chloride, oxide Below: potassium chromate and ammonium dichromate ... of positive and negative ions 3.225 © E Fitzgerald-1999 © H.L Tuller, 2001 Ferroelectrics Applications • Capacitors • Non-volatile memories • Photorefractive materials 3.225 Characteristics of...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 4 pps
... the valence band to the conduction band E Ec near band gap E=hν k Creates a ‘hole’ in the valence band Ev near band gap 3.225 © E Fitzgerald-1999 Holes and Electrons • • Instead of tracking electrons ... 1,000,000 Remember that: 3.225 µ= eτ m* and 1 ∂2E = m * h ∂k 2 Metals and Insulators • EF in mid-band area: free e-, metallic • EF near band edge – EF in or near kT of band edge: semimetal – EF in gap: ... Real Band Structures • GaAs: Very close to what we have derived in the nearly free electron model • Conduction band minimum at k=0: Direct Band Gap 3.225 © E Fitzgerald-1999 15 Review of H atom...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 11 potx
... since energy ~ LI and for loop L = ΦB I Φ B = ∫ ∫ H ⋅ dS ~ HA ∴ µH = Φ B I = HAI and ∴ µ = IA e ω A = πr c 2π e µ = − ωr 2c I =− 3.225 © E Fitzgerald-1999 Microscopic Source of Magnetization • ... induction, “softer” Magentic anisotropy hardness of loop dependent on crystal direction comes from spin interacting with bonding 3.225 © E Fitzgerald-1999 Domains in Ferromagnetic Materials B ... Fe, Ni, Co -> J positive! Other elements J is negative Rule of Thumb: interatomic distance r ≡ > 2ra 2(atomic radius) J is a function of distance! 3.225 © E Fitzgerald-1999 Ferromagnetism M M (T...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 2 pot
... metals look like free-electron Drude metals • Valence=2 and 3, magnitude and sign suggest problems 3.225 © E.A Fitzgerald-1999 25 13 Response of Free e- to AC Electric Fields • Microscopic picture ... 3.225 © E.A Fitzgerald-1999 Complex Representation of Waves sin(kx-ωt), cos(kx-ωt), and e-i(kx-ωt) are all waves e -i(kx-ωt) is the complex one and is the most general imaginary A θ Acosθ iAsinθ ... Response of e- to AC Electric Fields • Momentum represented in the complex plane imaginary p (ω>>1/τ) p p (ω
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 7 pptx
... c k optical → k n εr 3.225 So polarization slows down the velocity of the wave in the material © E Fitzgerald-1999 Compare Optical (index of refraction) and Electrical Measurements of ε ... susceptibility All detail of material response is in εr and therefore P 3.225 © E Fitzgerald-1999 Origin of Polarization • • • We are interested in the true dipoles creating polarization in materials (not ... E-M waves travel in insulating materials: What is the response of the material (εr) to these waves? 3.225 © E Fitzgerald-1999 Wave Eqn with Insulating Material and Polarization r r ∂B ∇xE = −...
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Magneto transport, magneto optical and dynamic properties of ferromagnetic nanostructures
... MAGNETO -OPTICAL AND DYNAMIC PROPERTIES OF FERROMAGNETIC NANOSTRUCTURES LIU XINMING (M.Eng, HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY ... reversal and MR behaviors of Co/Pd NWs and [Co/Pd]4/Au(tAu)/[Co/Pd]2 PSV NWs are systematically investigated as a function of tAu and temperature T In chapter 6, the static and dynamic properties of ... fundamental research and their potential in a wide range of emerging applications In this thesis, a systematic investigation of magneto-transport, magneto -optical and dynamic properties of Co/Pd multilayer...
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Optical and electronic properties of inkjet printed polymer organic semiconductor films
... NEXAFS study of the dichroism of the C1s→π* transition of the frontier polymer chains, and of the spectrum, for both the top and bottom interfaces of rrP3HT thin films deposited by sc, dc and ijp ... number of energy levels The energy gap determines the electronic and electrical properties of the conducting polymers Hence, control of the HOMO-LUMO gap and specifically the design of low band ... AFM topography micrographs of (d) top and (g) bottom surfaces of ijp rrP3HT film, (e) top and (h) bottom surface of dc rrP3HT film, (f) top and (j) bottom surface of sc rrP3HT film Root-meansquare...
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A comparative study of the biological and physical properties of viscosity enhanced root repair material (VERRM) AND MTA
... Portland Cement 2.2 Physical properties of MTA 2.3 Biological Properties of MTA 13 2.4 Comparison of White and Gray MTA 20 2.5 Comparison between MTA and ... STUDY OF THE BIOLOGICAL AND PHYSICAL PROPERTIES OF VISCOSITY ENHANCED ROOT REPAIR MATERIAL (VERRM) AND MTA PALLAVI UPPANGALA (BDS RGUHS, India) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF SCIENCE ... antimicrobial and antifungal properties similar to that of super-EBA and ZOE (Torabinejad et al 1995d, Al-Nazhan & Al-Judai 2003) The cytotoxic properties of MTA were lower than that of IRM and super-EBA...
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Optical and mechanical properties of cu al o thin films prepared by plasma enhance CVD
... (TCO) materials, especially on Cu-Al-O Sections 2.3 and 2.4 introduce the contemporary research on the optical and mechanical properties of TCO materials Since reports on both of the properties of ... possibility of large-scale industrial production of transparent devices 11 2.3 OPTICAL PROPERTIES OF TCOS 2.3 Optical Properties of TCOs For transparent conductive oxides, the most widely investigated optical ... Mechancial Behavior of Materials, McGraw-Hill, Chapter 1, 2000 [39] VanLandingham M R., Review of Instrumented Indentation, Journal of Research of the National Institute of Standards and Technology,...
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research on fabrication and the physical properties of the multi-component ceramics based on pzt and the relaxor ferroelectric materials
... fabrication and the physical properties of the multi-component ceramics based on PZT and the relaxor ferroelectric materials The objective of the thesis is: (i) Fabrication and research the effects of ... systematic research of the dielectric, piezoelectric and ferroelectric properties contribute further understanding of the physical properties of the multi-component ceramics based on PZT and the relaxor ... PZT content of 0.8 mol and then rapidly decrease The grain size and the density of ceramics have a strong effect on dielectric, piezoelectric and ferroelectric properties of ceramic materials The...
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- chemical and physical properties of beer
- 6 optical and mechanical properties of fibers
- chemical and physical properties of polyimides biomedical and engineering applications
- chemical biochemical and physical properties of foods
- physical properties of materials and fluids
- fabrication characterization and physical properties of nanostructured metal replicated membranes
- the chemical and physical properties of building materials
- biosynthesis structure and physical properties of some bacterial polysaccharides
- structure and physical properties of some bacterial polysaccharides
- structural and physical properties of alginates
- physical properties of materials
- biological and physical properties of human blood
- chemical and physical properties of the vitamins
- 1 structure and physical properties of metals
- thermo physical properties of materials
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