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Articles 1 - 13 of 13
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A Study Of Manganese And Cobalt Incorporated Nickel Oxide Based Core-Shell Magnetic Nanoparticles, Samiul Hasan
A Study Of Manganese And Cobalt Incorporated Nickel Oxide Based Core-Shell Magnetic Nanoparticles, Samiul Hasan
MSU Graduate Theses
The synthesis along with the structural and magnetic properties of manganese (Mn) and cobalt (Co) -incorporated nickel oxide (NiO) inverted core-shell nanoparticles (CSNs) were investigated. The primary objective of this study was to determine the effect of substitution of nickel (Ni) by transition metal ions (Mn2+/Co2+) in affecting the magnetic properties of the resultant CSNs. The core of the CSNs is comprised of NiO and the shell constitutes a Nix(Mn/Co)1-xO phase. The synthesis of the CSNs was accomplished in two steps: first, NiO nanoparticles were synthesized using a thermal decomposition method. In …
Block Copolymer Nanostructures For Inorganic Oxide Nanopatterning, Krishna Pandey
Block Copolymer Nanostructures For Inorganic Oxide Nanopatterning, Krishna Pandey
MSU Graduate Theses
Self-assembled nature of block copolymer (BCP) makes them ideal for emerging technologies in nanometer scale. The micro phase separation between two or more dissimilar polymer blocks of BCP leads to uniform periodic nanostructures of different domains of dimension in the range of 5-100 nm, good for the development of emerging microelectronic and optoelectronics devices. Molecular weight and chain architecture of each blocks govern the morphology evolution; gives different structure like spherical, micelles, lamellae, cylindrical, gyroid etc. The morphology evolution of BCP nanostructure also depends on different external factors as well. In the first work of this thesis, three external factors …
Study Of Iron Ion Transit Through Three-Fold Channel Of Ferritin Cage, Shah Alam Limon
Study Of Iron Ion Transit Through Three-Fold Channel Of Ferritin Cage, Shah Alam Limon
MSU Graduate Theses
Ferritin is an iron-storage globular protein with an ability to uptake, mineralize and release iron ions in a controllable manner. The globular hollow shell allows storage of mineralized iron, with several channels responsible for the transit of ions into the shell and out of it. Understanding of the detailed molecular functioning of ferritin is required for rational design of biomimetic conjugate nano-biosystems containing ferritin-like constituents. In this work, ferritin was investigated both numerically by all-atom molecular dynamics (MD) simulations, and experimentally by Raman spectroscopy. Molecular dynamic simulations of a model system comprising iron ions (Fe2+) and a ferritin trimer expressing …
Application Of Raman Spectroscopy To Study Of Biological Systems, Neva Agarwala
Application Of Raman Spectroscopy To Study Of Biological Systems, Neva Agarwala
MSU Graduate Theses
Raman spectroscopy is an important tool of molecular characterization based on inelastic scattering of monochromatic light by molecules. Since Raman spectra reflect unique vibrational properties of materials, the method offers a potential of selective molecular identification. Furthermore, surface-enhanced Raman spectroscopy (SERS) also is capable of a high sensitivity, since inelastic scattering of light from the molecules is strongly enhanced when Raman-active molecules are located close to roughened noble metal surfaces. In this thesis, Raman characterization protocols of liquid biological samples are optimized. Raman spectra of two different cell cultures, yeast cells and HeLa cells, were collected and interpreted. The potentiality …
Experimental And Theoretical Study Of Vapor Phase Species Above Hot Rocky Exoplanet Analogues, Michal Bulak
Experimental And Theoretical Study Of Vapor Phase Species Above Hot Rocky Exoplanet Analogues, Michal Bulak
MSU Graduate Theses
With the James Webb Space Telescope and other space-based missions launching in the next few years, the astrophysics community awaits an exciting time. This work is an answer to a call for the laboratory contributions necessary to analyze the data of unprecedented accuracy. I performed a laboratory analysis of an analogue of a hot super earth atmosphere. This type of an extra solar planet has a rocky composition and has extremely high temperature (from 1500˚C – 5000˚C). I performed infrared spectroscopy on the gas phase vapor above a mixture of two binary systems: SiO2 with Al2O3 and CaO with SiO2. …
Development Of Many-Body Potential For Deformation Study In Al-Tin Nanolayered Composites, Paul Yaohan Simanjuntak
Development Of Many-Body Potential For Deformation Study In Al-Tin Nanolayered Composites, Paul Yaohan Simanjuntak
MSU Graduate Theses
A novel interatomic potential of ternary Al-Ti-N has been developed to study the deformation behavior of Al-TiN nanolaminates. The ternary nanolayered Al-TiN composite has attracted a lot of interest due to its combination of strength and ductility. The current analysis on the system has been primarily concentrated on continuum models which are inadequate to explain the key deformation events such as nucleation and interaction of dislocations. Progress in the preferred atomistic approach has been hampered however by the lack of available interatomic potential optimized for the ternary system. I developed a many-body potential based on embedded atomic model (EAM) by …
Investigations Of Pld Grown Tungsten Oxide Thin Films, Anthony Thomas Pelton
Investigations Of Pld Grown Tungsten Oxide Thin Films, Anthony Thomas Pelton
MSU Graduate Theses
Pulsed laser deposition (PLD) is a promising technique for creating inexpensive,nanostructured thin films which may lead to structures suitable for photocatalysis. During this study, multiple tungsten oxide thin films were prepared using two types of PLD techniques. The first method was conducted at US Photonics, Springfield, MO, using a femtosecond laser while the second method relied on use of an excimer (nanosecond) laser located at Missouri State University. Films were first deposited on glass using both methods at room temperature. Further study was conducted on thin films deposited on sapphire and silicon deposited at room temperatures and at elevated temperatures. …
Multifunctional Transition Metal Oxide Core Shell Magnetic Nanoparticles, Mahmud Reaz
Multifunctional Transition Metal Oxide Core Shell Magnetic Nanoparticles, Mahmud Reaz
MSU Graduate Theses
Oxide core-shell nanoparticles (CSNPs) have attracted considerable interest for their multifunctional properties. Luminescent ZnO, ferroelectric BaTiO3, and inverse spinel iron oxide can be exploited to develop magneto-luminescent and multiferroic nanomaterials. The novel sonochemical method has been used to synthesize the nanomaterials. Atomic-scale spectroscopy establishes the core-shell nature and multifunctional properties of the nanomaterials. Magnetic hysteresis (coercivity, remnant, and saturation magnetization) and temperature dependent data indicate the key structural difference between the oxidized and reduced ZnO/iron oxide CSNPs. Variation in the coercive field and remnant and saturation magnetization further confirms the presence of different iron oxides in the shell region. Temperature …
Ftir Spectroscopy Of Hot Exoplanets: A First Step In Experimental Procedure And Analysis, Heath Emmanuel Gemar
Ftir Spectroscopy Of Hot Exoplanets: A First Step In Experimental Procedure And Analysis, Heath Emmanuel Gemar
MSU Graduate Theses
In this thesis, I demonstrate how I constructed a complete experimental package to view FTIR Spectroscopy of constituents that make up hot, rocky exoplanets. I examine in detail the engineering and construction of such a system. Also, I developed a full computational package to analyze spectra in association and relate the analysis to that of real world application. The new system produces reproducible IR spectra on exoplanet analogs and can be used to probe complex chemistry composition at high temperatures.
Study Of Multiferroic Properties Of Ferroelectric- Ferromagnetic Heterostructures Bzt-Bct/Lsmo, Md Abdullah-Al Mamun
Study Of Multiferroic Properties Of Ferroelectric- Ferromagnetic Heterostructures Bzt-Bct/Lsmo, Md Abdullah-Al Mamun
MSU Graduate Theses
Currently, there has been a flurry of research focused on multiferroic materials due to their potential applications. Lead (Pb)-based ferroelectric and multiferroic materials (PZT, PMN-PT, PZN-PT etc.) have been widely used for sensors, actuators, and electro-mechanical applications due to their excellent dielectric and piezoelectric properties. However, these materials are facing global restriction due to the toxicity of Pb. In this thesis, multiferroic properties of ferroelectric-ferromagnetic heterostructures consist of Pb-free perovskite oxides 0.5Ba(Zr0.2Ti0.8)O3-0.5 (Ba0.7 Ca0.3)TiO3 (BZT-BCT) and La0.7Sr0.3MnO3 (LSMO) have been studied. The heterostructures BZT-BCT/LSMO were …
Dft Study On The Li Mobility In Li-Ion-Based Solid-State Electrolytes, Shafiqul Islam
Dft Study On The Li Mobility In Li-Ion-Based Solid-State Electrolytes, Shafiqul Islam
MSU Graduate Theses
I have investigated the diffusion mechanisms of Li-ion in amorphous lithium phosphite (LiPO3) with addition of sulphur. By applying the nudge elastic band (NEB) method in crystal LiPO3 and Li3PO4, I confirmed the easing of diffusion pathways for Li ion in LiPO3 which is consistent with the previous theoretical finding[1]. From the diffusion study in 0.5 Li2O- 0.5 P2O5 and 0.4 Li2SO4 – 0.6 (Li2O-P2O5) melts above 3000K performed with ab-initio molecular dynamics (AIMD), produces identical outcome as …
Study Of Nano-Bio Interfaces In Nano-Bio Conjugates: Nanoparticles Of Zinc Oxide (Zno) And Biomolecules Of Glucose, Cytosine, And Thymine, Bithi Paul
MSU Graduate Theses
Nano conjugates, composites of inorganic nanomaterials and bio molecules such as DNA, RNA and proteins, establish a sequence of wide varieties of nano-bio boundaries. The formation of these boundaries strongly depends on bio physicochemical reaction of biomolecules coated on the surface of nanomaterials. I am investigating various nano-bio conjugates consisting of zinc oxide (ZnO) nanoparticles with simple biomolecules including glucose and the nitrogenous bases of DNA such as cytosine and thymine. All nano-bio conjugates were fabricated using a standard bio-chemical synthesis process. Structural, physical, bio-chemical interface properties of nano-bio composites were probed using X-ray diffraction (XRD), Raman spectroscopy, and photoluminescence …
A Study Of Copper And Aluminum Incorporated Chromium Oxide Core-Shell Magnetic Nanoparticles, Tamzid Ibn Minhaj
A Study Of Copper And Aluminum Incorporated Chromium Oxide Core-Shell Magnetic Nanoparticles, Tamzid Ibn Minhaj
MSU Graduate Theses
The structural and magnetic properties of copper (Cu) and aluminum (Al) -incorporated chromium oxide (α-Cr2O3, i.e., chromia) inverted core-shell nanoparticles (CSNs) were investigated. The objectives of this study were to determine the role of the substituting (for chromium, Cr) element and of Cu concentration on governing the magnetic properties of the CSNs. For synthesis of the CSNs, α-Cr2O3 nanoparticles were first grown using microwave assisted synthesis whereupon a hydrothermal nanophase epitaxy (HNE) method was used to incorporate Cu or Al in the chromia-based shell of the nanoparticles. The morphology, structure and size characteristics …