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Showing 1 to 20 of 54 for “"Transmission Electron Microscope (TEM)"”.
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Synthesis and Characterization of Magnetic II-VI Nanoparticles
… colloidal II-VI magnetic nanoparticles at room temperature with easily handled, relatively non-toxic source materials. CoSe and CrSe nanocrystals were synthesized in an aqueous solution where gelatin is used to retard the reaction. Characterization of the nanocrystals was done through …
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Novel Synthetic Routes to Formation of Magnetic Nanocomposites
… properties of nanocomposites were analyzed by transmission electron microscope (TEM), energy dispersive spectra (EDS), superconducting quantum interference device (SQUID) and inductively coupled plasma (ICP). The nanocomposite materials were magnetic and exhibited optical properties similar to …
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Controlled multi-step purification of single-walled carbon nanotubes
… by multiple step oxidation at increasing temperatures. To avoid catalytic oxidation by iron oxide of carbon nanotubes, the exposed and oxidized iron oxide is deactivated by reaction with C2H2F4 or SF6. The iron fluorides are removed by a soxhlet extraction with a 6M HCl solution. The …
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Heavy-ion damage in copper, nickel and dilute nickel alloys
… of material, alloying element, irradiation temperature and ion dose on the probability of collapse of a displacement cascade, Cu, Ni, and dilute Ni alloys (Ni-Si and Ni-Al) have been irradiated with 50 and 100 keV heavy-ions (Kr$\sp+$ and Ni$\sp+$) at both 30 and 300K, and to doses ranging …
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Development of a nanostructure thermal property measurement platform compatible with a transmission electron microscope
… was designed for compatibility with a customized transmission electron microscope (TEM) specimen holder. An in-situ scanning electron microscope pick-and- place technique was developed to select and place an individual nanostructure onto the measurement platform. A through-hole for sample …
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Crystal engineering, Bio Pharmaceutics and Cell biology of active pharmaceutical ingredient (drug) nanoparticles. Formation and cell interaction of hydrocortisone and prednisolone nanoparticles.
… values. Dynamic light scattering (DLS) and transmission electron microscope (TEM) techniques were used to characterize the prepared nanoparticles. Powder X-ray diffraction (PXRD) and differential scanning calorimetry (DSC) were also used to characterize hydrocortisone nanoparticles. In the …
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Green Synthesis and Evaluation of Catalytic Activity of Sugar Capped Gold Nanoparticles
… methods, in our present study, we made an attempt to design a method for the green synthesis of monodispersed and stable gold nanoparticles by sugars which act as reducing and stabilizing agent. Characterization of synthesized nanoparticles was done by using various analytical techniques such …
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Deposition and Characterization of Ceramic Thin Films and a New Experimental Approach to Evaluate the Mechanical Integrity of Film/Substrate Interfacial Layers
Due to their corrosion resistance, high temperature stability, high strength, and high hardness, refractory ceramic thin films and coatings have been utilized for surface engineering of mechanical components and mechanical fabrication tools. Adhesion between ceramic thin films and coatings and the …
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Crystal engineering, Bio Pharmaceutics and Cell biology of active pharmaceutical ingredient (drug) nanoparticles. Formation and cell interaction of hydrocortisone and prednisolone nanoparticles.
… values. Dynamic light scattering (DLS) and transmission electron microscope (TEM) techniques were used to characterize the prepared nanoparticles. Powder X-ray diffraction (PXRD) and differential scanning calorimetry (DSC) were also used to characterize hydrocortisone nanoparticles. In the …
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Binary diamondoid molecular gels
… gel’s elastic modulus increases as ϕx with x~4. Transmission Electron Microscope (TEM) images indicate that the gels are formed from a network of interwoven and branched fibers. In combination, the flow properties and TEM images indicate that the fibers can be broken down under shear and reform …
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In situ transmission electron microscopy ion irradiations of model iron-chromium alloys
… of a nuclear reactor. We examine the effects of temperature and chromium concentration on the defect evolution and segregation behavior in the early stages of damage. In situ irradiations are conducted in a transmission electron microscope (TEM) at 300°C and 450°C with 150keV iron ions in single …
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Fabrication of Fluorescent Nanoprobes and Their Applications in Nanophotonics
… We have custom designed an optical system for this nanoprobe fabrication. We have characterized the nanoprobes using transmission electron microscope (TEM) and scanning electron microscope (SEM) and performed preliminary experiments on near field scanning. Our current …
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Experimental and Numerical Analysis of Convective Heat Transfer Enhancement With Nanofluids Flowing Over A Heated Flat Plate
… The particle size was measured by using both a transmission electron microscope (TEM) and a dynamic light scattering system (DLS). Nanofluid viscosity was measured and equations for the viscosity of the nanofluids were developed as a function of temperature. The significance of correct effective …
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Investigation on Light-driven Photocatalyst-based Materials for Wastewater Cleaning and Environmental Remediation
… has been synthesized by self-assembly at room temperature. The properties of the catalyst are investigated by scanning electron microscope (SEM), X-ray diffraction (XRD), transmission electron microscope (TEM) and N2 adsorption-desorption. The photocatalytic activities of the tube-like Ag3PO4 …
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Effects of Thickness and Indenter Tip Geometry in Nanoindentation of Nickel Films
… and conical). X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscopy (SEM), and atomic force microscopy (AFM) analysis were performed on these materials to determine the crystal orientation, grain size of the material, and also to measure any …
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Channeling studies of the location of zinc in GaAs
… by CHanneling Enhanced Microanalysis) in a Transmission Electron Microscope (TEM). This required substantial enhancements to the x-ray microanalytic abilities of the TEM along with an improved understand of the nature of the illumination in the immersion lens of a TEM, all of which are …
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The mechanism of thin film Si nanomachining using femtosecond laser pulses
… The pulse time ('width') is shorter than the electronic relaxation time, resulting in a decoupling of the period of laser illumination and the melting of the substrate. Since the laser does not directly heat the substrate, and there has been no directly observed heat affected zone (HAZ) nor …
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Study of Si1-xGex Junction Formation for SOI Based CMOS Technology
… is studied using Raman spectroscopy and transmission electron microscope (TEM). For epitaxially grown SiGe film on SOI, there is lower degree of strain development in the SOI layer due to the rigid interface between the SOI and the burried oxide as compared to bulk. However, for silicon …
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Microstructural evolution of zirconium carbide (ZrCₓ) ceramics under irradiation conditions
… dissertation focusses on elucidating the ion and electron irradiation response of ZrC<sub>2</sub> ceramics. In the first part of the research, the microstructural evolution was characterized for ZrC<sub>2</sub> ceramics irradiated with 10 MeV Au<sup>3+</sup> ions up to doses of 30 displacement per …
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Characterization of mechanical properties of copper covetic wires
… in a Dual-Beam Focus Ion Beam for analysis in a Transmission Electron Microscope (TEM). The diffraction and images generated by the TEM show the possibility of carbon being incorporated into the copper sample. The results show promise for covetics for various industrial applications.
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