Open Access. Powered by Scholars. Published by Universities.^{®}
 Discipline
 Keyword

 DFT (3)
 FLOSIC (2)
 Charge Transfer (1)
 Elastic neutron diffraction of CoTa2O6 (1)
 Hyperthermia (1)

 Nanomagnetics (1)
 Maximum Likelihood (1)
 Magnetic exchange coupling (1)
 Molecular Dynamics (1)
 Copper acetate monohydrate (1)
 Blinking (1)
 Endohedral Metafullerene (1)
 Interface (1)
 Entropy (1)
 Broad features in magnetization (1)
 Laser (1)
 Excited State (1)
 DIPOLE MOMENT (1)
 Magnetocaloric (1)
 DIPOLE BOUND ANION (1)
 Biomaterials (1)
 Maxwell Construction (1)
 Fuel Cells (1)
 Estimation (1)
 Low dimensionality (1)
 Nanoparticles (1)
 FlowCytometer (1)
 Fullerenes (1)
 Magnetic (1)
 Isospin (1)
Articles 1  15 of 15
FullText Articles in Physics
Dimensionality Of Magnetism In Trirutile Cota2o6 And Its Derivatives, Raju Baral
Dimensionality Of Magnetism In Trirutile Cota2o6 And Its Derivatives, Raju Baral
Open Access Theses & Dissertations
In this thesis, we addressed the question of low dimensionality of trirutile compound CoTa2O6 and studied how the low dimensionality evolved with doping of Mg on Cosite. In order to study low dimensionality in CoTa2O6 and its derivative compounds Co1xMgxTa2O6 (x = 0.1, 0.3, 0.5, 0.7, and 1), we used different techniques: Xray diffraction, magnetic susceptibility, magnetization, specific heat and elastic neutron diffraction. We have addressed the question of low dimensional magnetism of CoTa2O6 by preparing phasepure samples of the compound. In CoTa2O6 a broad feature is observed in magnetic susceptibility at 10 K and an antiferromagnetic ...
Study Of Blinking Statistics In Silver Coated Cobalt Ferrite Single Nanoprticle Using TwoPhoton Fluorescence Microscopy, Rajen Kumar Goutam
Study Of Blinking Statistics In Silver Coated Cobalt Ferrite Single Nanoprticle Using TwoPhoton Fluorescence Microscopy, Rajen Kumar Goutam
Open Access Theses & Dissertations
Twophoton fluorescence microscopy is a powerful tool to study the molecular and cellular interactions. This technology is a noninvasive approach with the advantage of threedimensional imaging up to submicron resolution. Twophoton excitation process is the result of simultaneous absorption of two photons that has special features of reduced photodamaged and elongated penetration depth on samples. In this work, blinking statistics of silvercoated Cobalt ferrite (CoFe2O4) single nanocrystal is studied using twophoton fluorescence microscopy. By defining the intensity threshold, the observed fluorescence is divided into two distinct stages: OFF and ON states. Both of these states followed the inverse power law ...
Novel Maximum Entrophy Method For The Average Survival Time Differences Between Two Groups, Joscelyne Guzman  Gonzalez
Novel Maximum Entrophy Method For The Average Survival Time Differences Between Two Groups, Joscelyne Guzman  Gonzalez
Open Access Theses & Dissertations
We suggest a Maximum Likelihood estimator for the Average Survival Time Difference between two groups, based on the extra time in which should be added to one group to produce the maximum entropy of the result. The estimator is calculated only from time to event data, does not assume hazard proportionality and provides directly the magnitude of the clinical differences between the groups. Our Monte Carlo simulations show that, even at low sample numbers the estimator is a reliable predictor for the clinical differences between the groups, and therefore can be used to estimate from preliminary data whether or not ...
Using TwoPhoton Microscopy To Analyze Arabidopsis Thaliana Leaves Under Autophagy Conditions And Second Harmonic Generation In Collagen, Andres Martin Reyes
Using TwoPhoton Microscopy To Analyze Arabidopsis Thaliana Leaves Under Autophagy Conditions And Second Harmonic Generation In Collagen, Andres Martin Reyes
Open Access Theses & Dissertations
Twophoton microscopy has emerged as a highly efficient and effective imaging tool for biological samples. This can be utilized in studying recently emerging technologies and conditions such as the autophagy process in arabidopsis thaliana leaves and second harmonic generation in collagen. Both of these areas of study utilize the twophoton microscopy practice effectively in uncovering more information of the biological nature of examined samples.
QuasiHarmonic And Anharmonic Entropies In Transition Metals, Bimal K C
QuasiHarmonic And Anharmonic Entropies In Transition Metals, Bimal K C
Open Access Theses & Dissertations
Density functional theory (DFT) employing the quasiharmonic approximation (QHA) is a robust method for evaluating thermal properties of solids. In the case of transition metals however, the method yields high values of the thermal pressure when compared to experimental data or with more direct methods like quantummolecular dynamics (QMD) simulations. Surprisingly, there has not been to date, a systematic study aimed at understanding the reasons for these large discrepancies, particularly at low temperature, i.e. below the Debye temperature of the solid. Using Tantalum as a test model for which a lot of experimental data exist, thermal properties were evaluated ...
Magnetic Nanoparticles For Hyperthermia For Cancer Treatment, Bianca Paola Meneses Brassea
Magnetic Nanoparticles For Hyperthermia For Cancer Treatment, Bianca Paola Meneses Brassea
Open Access Theses & Dissertations
Fe3O4 and NixCu4x magnetic nanoparticles were synthesized using supercritical conditions of liquids and wet chemistry, respectively. Characterization methods (VSM, SEM, TEM, and magnetic hyperthermia) yielded results that prove feasibility for magnetic hyperthermia for cancer treatment.
Spectroscopic Analysis Of Calcium Oxalate Kidney Stone Inhibition By Nordihydroguaiaretic Acid (Ndga), Mahendra Subedi
Spectroscopic Analysis Of Calcium Oxalate Kidney Stone Inhibition By Nordihydroguaiaretic Acid (Ndga), Mahendra Subedi
Open Access Theses & Dissertations
This current study provides information regarding the inhibition of calcium oxalate type of kidney stones by the use of nordihydroguaiaretic acid (NDGA). Around 80% of kidney stones found in patients are principally made of calcium oxalate and calcium phosphate. NDGA is an antioxidant compound that is chemically extracted from the desert bush Larrea tridentata. This work is a logical continuation of a previous research, where different concentrations of Larrea tridentata extract were used for such inhibition. Size and morphological changes from a calcium oxalate monohydrate (COM) structure to a calcium oxalate dihydrate (COD) structure were previously reported.
In the current ...
A Study Of Solvent Effects On The Ground And Excited States Of Endohedral TriScandium Nitride C80 Fullerene Coupled With Zinc Phthalocyanine And MetalFree Phthalocyanine Using DftPcm Method, Timilsina Prasad Timlsina
A Study Of Solvent Effects On The Ground And Excited States Of Endohedral TriScandium Nitride C80 Fullerene Coupled With Zinc Phthalocyanine And MetalFree Phthalocyanine Using DftPcm Method, Timilsina Prasad Timlsina
Open Access Theses & Dissertations
The photovoltaic active materials composed of endohedral metafullerene and phthalocyanine derivatives are known as excellent electron donoracceptor pairs. The trimetallic nitride endohedral C80 fullerene exhibits high absorption coefficients in the visible region of the spectrum and has similar electronaccepting abilities as that of C60 fullerene, which can allow for higher efficiencies in OPV devices. In this study, we examine the effect of solvent on the charge transfer excitation energies of Sc3N@C80ZnPc and Sc3N@C80H2Pc donoracceptor molecular complexes. Three different solvents with different polarity  water, toluene, and acetone are used. The solvent is modeled as a polarizable continuum as implemented ...
Computational Studies On PerovskiteMetallofullerene Interface And Magnetic Properties Of MnBased Mixed Olivines, Bethuel Omutiti Khamala
Computational Studies On PerovskiteMetallofullerene Interface And Magnetic Properties Of MnBased Mixed Olivines, Bethuel Omutiti Khamala
Open Access Theses & Dissertations
Methyl ammonium lead halide (MAPbX3) perovskite based solar cells have recently emerged as promising class of materials for photovoltaic applications with efficiencies reaching over 22%. Designing interfaces with strong binding is vital to developing efficient, highperforming solar cells. Fullerenebased materials are widely employed as efficient electron acceptors and can serve as electron transporting layer in perovskite based solar cells. We have studied interfaces of methyl ammonium lead iodide MAPbI3 with Sc3N@C80 fullerene and Sc3N@C80PCBM fullerene derivate within the density functional formalism. Different surface terminations and orientations of the methyl ammonium are examined for binding of the fullerene layer ...
Non Linear Optics For Materials Fabrication And Medical Instrumentation, Aurelio Paez
Non Linear Optics For Materials Fabrication And Medical Instrumentation, Aurelio Paez
Open Access Theses & Dissertations
Twophoton absorption is a nonlinear optical process where two photons are absorbed by a molecule simultaneously. The probability of this quantum phenomenon is proportional to the quadratic excitation of light intensity. It has many applications in biomedical and materials research, such as twophoton fluorescence microcopy. The first project is to apply twophoton absorption induced bond cleavage in photoreactive materials for engineering 3D tissue scaffolds. The major challenge for growing thick 3D tissues is the lack of vasculature, where nutrients and oxygen can be delivered to the growing cells. Our collaborators have synthesized a novel polypeptide that is composed of 34mer ...
Electron Binding Energy Of Polar Molecules Using Fermi Löwdin Orbital Self Interaction Corrected Density Functional Scheme, Peter Obinna Ufondu
Electron Binding Energy Of Polar Molecules Using Fermi Löwdin Orbital Self Interaction Corrected Density Functional Scheme, Peter Obinna Ufondu
Open Access Theses & Dissertations
Density functional theory (DFT) has become a standard method for electronic structure calculations in physics. The standard approximate density functional usually do not bind this class of anions, due to selfinteraction error (SIE). We apply the recently developed Fermi Löwdin orbitals based selfinteraction correction method (FLOSIC) with longrange diffuse Gaussian functions to study dipole bound anions and negatively charged water clusters. These calculations are carried out using PerdewWang (1992) local spin density PW91LDA, PerdewBurkeErnzerhof PBEGGA, and the recently developed Strongly Constrained and Appropriately Normed SCANmetaGGA functional which satisfies all the known constraints for exchangecorrelation functional. Plot from FLOSIC density difference ...
Nonlinear Optics For Nanoparticle Tracking And Materials Characterization, Angela Christina Aguilar
Nonlinear Optics For Nanoparticle Tracking And Materials Characterization, Angela Christina Aguilar
Open Access Theses & Dissertations
A highspeed 3D imaging method is developed by integrating ultrafast laser pulse shaping, temporal focusing microscopy and defocused imaging. This system does not require mechanical movement of either the stage or laser beam. Axial scanning is achieved by manipulation of group velocity dispersions on the femtosecond laser spectrum via pulse shaping method by applying modulation functions on an acoustic optical modulator which diffracts the laser spectrum. The scanning depth becomes only dependent on electronic signals which can be tuned to kHz speeds. The volumetric highspeed scanning capability was demonstrated on fluorescent microspheres suspended in a volume of 100 x100 x ...
Study Of DElectron Systems With FermiLowdin Orbital SelfInteraction Correction, Prakash Mishra
Study Of DElectron Systems With FermiLowdin Orbital SelfInteraction Correction, Prakash Mishra
Open Access Theses & Dissertations
Density Functional Theory (DFT) is one of the very popular and versatile methods for calculations to study electronic structure, and the accuracy of DFT depends on the approximation used in the exchangecorrelation functional. One of the known problems with the approximation is that the widely used density functional approximations (DFA) suffer selfinteraction errors. Systems with delectrons such as transition metal oxides often show deviation of DFT predicted behavior from experimental result. SIE tends to unphysically lower the energies of fractionally occupied state which leads to deviation from piecewise linear behavior of total energy between two integer occupations. This leads to ...
Near Room Temperature Magnetocaloric Materials For Magnetic Refrigeration, Eduardo Martinez Teran
Near Room Temperature Magnetocaloric Materials For Magnetic Refrigeration, Eduardo Martinez Teran
Open Access Theses & Dissertations
Magnetic refrigeration (MR) is a cooling process based on the magnetocaloric effect (MCE) that is present to some extent in all magnetic materials, and the ones in which this effect is more appreciable are called magnetocaloric materials (MCM). The implementation of new designs and materials for the construction of cooling systems is a must do, being essential that these improved designs will reduce the environmental impact and increase the efficiency of their predecessors. In this thesis, the magnetocaloric effect theory is presented from a thermodynamic point of view and also the synthesis and study to a new Heusler alloy (MnFe2Ga ...
Phase Diagram Of Nuclear Matter, Adrian Gaytan Terrazas
Phase Diagram Of Nuclear Matter, Adrian Gaytan Terrazas
Open Access Theses & Dissertations
Nowadays it is well known that nuclear matter has a liquid and a gas phase, as well as a coexistence of phases region. Symmetric nuclear matter (same number of protons and neutrons) exhibit phase transitions from the gas phase to a liquidgas mixture. A useful tool to represent such phases and transitions is through diagrams that show the necessary conditions of density and temperature to be in either of the phases.
Now the question is, what if we extend the traditional phase diagram for symmetric matter to the asymmetric
cases (different number of protons and neutrons)?
This study uses classical ...