Spelling suggestions: "subject:"microprobe analysis"" "subject:"microprobes analysis""
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Polycrystalline CVD diamond probes for use in in vivo and in vitro neural studiesChan, Ho-yin. January 2008 (has links)
Thesis (Ph. D.)--Michigan State University. Electrical Engineering, 2008. / Title from PDF t.p. (Proquest, viewed on Aug. 17, 2009) Includes bibliographical references (p. 120-135). Also issued in print.
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The application of nuclear microprobe analysis in materials scienceMars, Johan Andre January 2003 (has links)
Thesis (DTech (Science))--Peninsula Technikon, Cape Town, 2003. / The impetus for the refinement and renewal of daily-used products has spurred international
interest in investigating the small in homogeneities that might exist in these products. This interest
has become an important part in the design philosophy, which is based on structural information
gained by the analysis of these products.
It is this drive that initiated the study to investigate the simultaneous use of novel nuclear analytical
techniques such as micro proton induced X-ray emission( u-PlXE), micro proton induced
gamma-ray emission (u-PlGE) and micro proton backscattering (u-RBS) to achieved a
broader and yet deeper insight into the fine structure of products. The fundamental underlying
physical principles of these techniques are discussed to gain in-depth knowledge on how to
them to obtain the desired information. Also determined was the degree of accuracy that could
be attained in the application of this knowledge. These principles were evaluated in conjunction
with the instrumentation with which the applicability of these techniques could then be
further extended. More so is the use of sophisticated software that facilitated the use of both
physical and instrumental parameters. After describing the necessary implements to achieve
this further know-how, products of industrial origin were investigated to determine in homogeneities
that existed in those products and compared those theoretical values.
The first application was made to ceramic-based sorption electrodes to be used in the purification
of wastewater.
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Design, Construction, and Application of an Electrostatic Quadrupole Doublet for Heavy Ion Nuclear Microprobe ResearchManuel, Jack Elliot 12 1900 (has links)
A nuclear microprobe, typically consisting of 2 - 4 quadrupole magnetic lenses and apertures serving as objective and a collimating divergence slits, focuses MeV ions to approximately 1 x 1 μm for modification and analysis of materials. Although far less utilized, electrostatic quadrupole fields similarly afford strong focusing of ions and have the added benefit of doing so independent of ion mass. Instead, electrostatic quadrupole focusing exhibits energy dependence on focusing ions. A heavy ion microprobe could extend the spatial resolution of conventional microprobe techniques to masses untenable by quadrupole magnetic fields. An electrostatic quadrupole doublet focusing system has been designed and constructed using several non-conventional methods and materials for a wide range of microprobe applications. The system was modeled using the software package "Propagate Rays and Aberrations by Matrices" which quantifies system specific parameters such as demagnification and intrinsic aberrations. Direct experimental verification was obtained for several of the parameters associated with the system. Details of the project and with specific applications of the system are presented.
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An ion microprobe study of trace element partitioning between clinopyroxene and liquid in the diopside (CaMgSi2O6) - albite (NaAlSi3O8) - anorthite (CaAl2Si2O8) systemRay, Glenn Lamar January 1981 (has links)
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1981. / Microfiche copy available in Archives and Science. / Includes bibliographies. / by Glenn Lamar Ray. / Ph.D.
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Scanning desorption of small molecules from model biological surfaces.Silver, Bruce (Bruce Richard) January 1977 (has links)
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 1977 / Includes bibliographical references. / Ph. D. / Ph. D. Massachusetts Institute of Technology, Department of Physics
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A SIMS based bevel-image technique for the analysis of semiconductor materialsFearn, Sarah January 2000 (has links)
No description available.
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Electron microscopy studies of magnetic tunnel junctionsYu, Chak Chung Andrew January 1999 (has links)
No description available.
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A study of small molecule ingress into planar and cylindrical materials using ion beam analysisSmith, Richard W. January 2001 (has links)
No description available.
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New data on hemihedrite from ArizonaLafuente, B., Downs, R. T., Origlieri, M. J., Domanik, K. J., Gibbs, R. B., Rumsey, M. S. 01 August 2017 (has links)
Hemihedrite from the Florence Lead-Silver mine in Pinal County, Arizona, USA was first described and assigned the ideal chemical formula Pb10Zn(CrO4)(6)(SiO4)(2)F-2, based upon a variety of chemical and crystal-structure analyses. The primary methods used to determine the fluorine content for hemihedrite were colorimetry, which resulted in values of F that were too high and inconsistent with the structural data, and infrared (IR) spectroscopic analysis that failed to detect OH or H2O. Our reinvestigation using electron microprobe analysis of the type material, and additional samples from the type locality, the Rat Tail claim, Arizona, and Nevada, reveals the absence of fluorine, while the presence of OH is confirmed by Raman spectroscopy. These findings suggest that the colorimetric determination of fluorine in the original description of hemihedrite probably misidentified F due to the interferences from PO4 and SO4, both found in our chemical analyses. As a consequence of these results, the study presented here proposes a redefinition of the chemical composition of hemihedrite to the ideal chemical formula Pb10Zn(CrO4)(6)(SiO4)(2)(OH)(2). Hemihedrite is isotypic with iranite with substitution of Zn for Cu, and raygrantite with substitution of Cr for S. Structural data from a sample from the Rat Tail claim, Arizona, indicate that hemihedrite is triclinic in space group P (1) over bar, a = 9.4891(7), b = 11.4242(8), c = 10.8155(7) angstrom, alpha = 120.368(2)degrees, ss = 92.017(3)degrees, gamma = 55.857(2)degrees, V = 784.88(9) angstrom(3), Z = 1, consistent with previous investigations. The structure was refined from single-crystal X-ray diffraction data to R-1 = 0.022 for 5705 unique observed reflections, and the ideal chemical formula Pb10Zn(CrO4)(6)(SiO4)(2)(OH)(2) was assumed during the refinement. Electron microprobe analyses of this sample yielded the empirical chemical formula Pb-10.05(Zn0.91Mg0.02)(Sigma) (= 0.93) (Cr5.98S0.01P0.01)(Sigma = 6.00) Si1.97O34 H-2.16 based on 34 O atoms and six (Cr + S + P) per unit cell.
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The design, implementation and applications of a beam rocking system for a nuclear microprobeKerckhove, Diane G. de January 1999 (has links)
No description available.
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