Discrete single-domain and pseudo-single-domain titanomagnetite particles in silicic glass of an ash-flow tuff

1983 ◽  
Vol 20 (2) ◽  
pp. 334-338 ◽  
Author(s):  
John Wm. Geissman ◽  
Nancy G. Newberry ◽  
Donald R. Peacor
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Analytical Electron Microscopy ◽  
Single Domain ◽  
Conventional Transmission Electron Microscopy ◽  
Thermoremanent Magnetization ◽  
Transmission Electron ◽  
Analytical Electron ◽  
Silicic Glass

Single-domain and pseudo-single-domain titanium-poor magnetite grains are present in silicic vitrophyre glass of an ash-flow tuff from western Nevada. Conventional transmission electron microscopy and analytical electron microscopy corroborate inferences, made solely from rock magnetic and remanence data, that the thermoremanent magnetization in the vitrophyre is carried by such grains. The magnetite grains vary in size, shape, and distribution throughout the glass. They probably crystal lized during violent eruption and welding of the ash flow, at temperatures well in excess of 600 °C.

scholarly journals Analytical High-resolution Electron Microscopy Reveals Organ-specific Nanoceria Bioprocessing

2017 ◽  
Vol 46 (1) ◽  
pp. 47-61 ◽  
Author(s):  
Uschi M. Graham ◽  
Robert A. Yokel ◽  
Alan K. Dozier ◽  
Lawrence Drummy ◽  
Krishnamurthy Mahalingam ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Analytical Electron Microscopy ◽  
High Resolution Electron Microscopy ◽  
Dark Field ◽  
Transmission Electron ◽  
Analytical Electron ◽  
Organ Specific

This is the first utilization of advanced analytical electron microscopy methods, including high-resolution transmission electron microscopy, high-angle annular dark field scanning transmission electron microscopy, electron energy loss spectroscopy, and energy-dispersive X-ray spectroscopy mapping to characterize the organ-specific bioprocessing of a relatively inert nanomaterial (nanoceria). Liver and spleen samples from rats given a single intravenous infusion of nanoceria were obtained after prolonged (90 days) in vivo exposure. These advanced analytical electron microscopy methods were applied to elucidate the organ-specific cellular and subcellular fate of nanoceria after its uptake. Nanoceria is bioprocessed differently in the spleen than in the liver.

High Resolution Tem Studies of β-Alumina Type Structures

1983 ◽  
Vol 31 ◽  
Author(s):  
K. J. Morrissey ◽  
Z. Elgat ◽  
Y. Kouh ◽  
C. B. Carter
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Analytical Electron Microscopy ◽  
Image Simulation ◽  
Commercial Alumina ◽  
Transmission Electron ◽  
Analytical Electron ◽  
High Resolution Tem ◽  
High Resolution Images

ABSTRACTHigh resolution transmission electron microscopy (HRTEM) has been used to study structures found in secondphase particles in commercial alumina compacts. Analytical electron microscopy has been used to identify elements present in the particles. Computer image simulation has been used for both the structural interpretation of high resolution images and predicting the effect which the presence of other elements would have on the observed structures.

Structure and Composition of Bismuth Nanowire Arrays

1999 ◽  
Vol 581 ◽  
Author(s):  
M. S. Sander ◽  
Y-M. Lin ◽  
M. S. Dresselhaus ◽  
R. Gronsky
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Porous Alumina ◽  
Analytical Electron Microscopy ◽  
Nanowire Arrays ◽  
Bismuth Nanowire ◽  
Liquid Bismuth ◽  
Transmission Electron ◽  
Analytical Electron ◽  
Recent Attention

ABSTRACTArrays of nanowires have attracted considerable recent attention due to their unique electronic and optical properties. While much effort has been directed at fabricating arrays and measuring their properties, much less has been done to characterize these materials. Understanding the structure and composition of the constituents in these arrays is crucial in order to control their properties. In this work, arrays with wire diameters from 35-90nm were fabricated by pressure injecting liquid bismuth into porous alumina templates. Transmission electron microscopy (TEM) and analytical electron microscopy (AEM) were used to characterize the arrays.

Advances in Imaging and Electron Physics, Volume 101, Edited by P.W. Hawkes 1998. Academic Press, San Diego. 244 pages. (hardback, $130)

1999 ◽  
Vol 5 (5) ◽  
pp. 374-376
Author(s):  
William F. Tivol
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
San Diego ◽  
Analytical Electron Microscopy ◽  
Academic Press ◽  
Transmission Electron ◽  
Analytical Electron

This volume comprises four articles on widely divergent topics and of equally divergent practicality. The first article, by P.E. Champness, is on the application of transmission electron microscopy to mineralogy; analytical electron microscopy and high-resolution transmission electron microscopy are discussed. If you are a mineralogist who is interested in the kinds of results these techniques can provide, or if you are an expert in transmission electron microscopy who wants to drum up business from the geology department in your institution, you will find useful information here.

The effect of small additions of Cu on precipitation in Al-Mg-Si alloys

1990 ◽  
Vol 48 (2) ◽  
pp. 442-443
Author(s):  
M. Tamizifar ◽  
G. Cliff ◽  
R.W. Devenish ◽  
G.W. Lorimer
Keyword(s):  
Electron Microscopy ◽  
Analytical Electron Microscopy ◽  
Scanning Transmission Electron Microscope ◽  
Argon Atmosphere ◽  
Age Hardening ◽  
X Ray ◽  
Transmission Electron ◽  
Heat Treated ◽  
Analytical Electron ◽  
Scanning Transmission

Small additions of copper, <1 wt%, have a pronounced effect on the ageing response of Al-Mg-Si alloys. The object of the present investigation was to study the effect of additions of copper up to 0.5 wt% on the ageing response of a series of Al-Mg-Si alloys and to use high resolution analytical electron microscopy to determine the composition of the age hardening precipitates.The composition of the alloys investigated is given in Table 1. The alloys were heat treated in an argon atmosphere for 30m, water quenched and immediately aged either at 180°C for 15 h or given a duplex treatment of 180°C for 15 h followed by 350°C for 2 h2. The double-ageing treatment was similar to that carried out by Dumolt et al. Analyses of the precipitation were carried out with a HB 501 Scanning Transmission Electron Microscope. X-ray peak integrals were converted into weight fractions using the ratio technique of Cliff and Lorimer.

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