Showing papers in "Ultramicroscopy in 1986"

TL;DR: In this article, the strength of the very weak high-resolution Fourier components of the image of a two-dimensional crystal was determined using real space correlation analysis, and the amplitude and phase information was extracted from the distortion-corrected image of the crystal.

TL;DR: In this article, an electron biprism was used to record the image plane off-axis holograms at atomic resolution by means of an electron-biprocessor, and numerical and light-optical reconstruction schemes were compared.

TL;DR: Using the high resolution transmission electron microscopy techniques of weak-multibeam dark-field and direct lattice imaging, platinum particles ranging in size from 0.8 to 50 nm were imaged and their surface structure characterized as discussed by the authors.

TL;DR: An algorithm for straightening the images of flexible filamentous structures based upon an assumption of a normal mode of bending is presented.

TL;DR: High resolution images of thin paraffin crystals and of purple membrane recorded with illumination spots substantiate the idea that beam-induced movement of radiation-sensitive organic specimens has been a major factor which has caused low dose images to be greatly inferior in their quality compared to electron diffraction patterns of the same type of specimens.

TL;DR: In this paper, the interference fringes, or electron Ronchigrams, appearing in the shadow images of thin periodic objects were used for calibration of the operating parameters of a scanning transmission electron microscopy (STEM) instrument.

TL;DR: In this article, structural rearrangements in small Pt crystals were studied in real time with a 400 kV high-resolution electron microscope equipped with TV image viewing and videorecording facilities.

TL;DR: Energy-filtered transmission electron microscopy was used to image the distributions of uranium and carbon in uranyl acetate stained catalase crystals, and the effects of plural inelastic and elastic-inelastic scattering were sufficiently large to show crystalline structure in unprocessed pre-edge inel elastic images.

TL;DR: Four possible structural models of the defect core are proposed to explain these experimental features, and computer-simulated lattice images of the models are compared with the experimental images.

TL;DR: In this paper, the authors reconstructed in-line electron holograms recorded in an HB-5 STEM instrument by computer processing in place of optical reconstruction, and the important parameters of the holograms, namely the spherical aberration and defocus, were obtained from the electron Ronchigrams.

TL;DR: A new electropolishing solution for thinning metal TEM specimens has been developed as discussed by the authors, which consists of lithium chloride, magnesium perchlorate, butyl cellosolve, and methanol.

TL;DR: In this article, the projection structure of the surface protein (HPI) of the Bacterium Deinococcus radiodurans to a resolution of 0.83 nm was determined using a thin layer of frozen-hydrated aurothioglucose.

TL;DR: The electron diffraction patterns of tilted thin crystals were used to determine the unit cell size in the direction normal to the supporting film and revealed a considerable dose-dependent thinning or shrinkage which could be attributable to two causes.

TL;DR: In this paper, the mechanism involved in the formation of the very small metallic Cu particles normally observed in reduced supported CuO was observed and the first successful synthesis of the rare Cu 4 O 3 phase was reported.

TL;DR: In this article, the authors investigated the energy of structural fluctuations in small particles and found that the primary cause of the structural fluctuations is the reduction of the surface energy anisotropy as the temperature is raised, either the thermal or electronic temperature.

TL;DR: In this paper, the excitation of bulk and surface plasmons in small metallic spheres is studied by means of electron loss spectroscopy in a scanning transmission electron microscope, and the results are compared with theoretical calculations.

TL;DR: In this paper, a new interpretation of results obtained by means of a technique developed recently by the Fraissard group and based on 129 Xe NMR NMR was presented.

TL;DR: AEM analysis revealed that there is significant loss of Na in the beam-damaged paragonite and that the fissures may be caused by collapse of the pyrophyllite-like structure due to loss of interlayer Na.

TL;DR: An algorithm is presented which provides an objective quantitative method for the identification and elimination of anomalous members of a set of pre-aligned images based on a statistical criterion of mutual consistency and an ordered list in which the individual images are ranked from most to least reliable.

TL;DR: In this article, a 500 kV high-resolution study of halogenated phthalocyanines was performed and the effect of electron beam damage was a degradation of crystallinity which varied considerably according to local morphology and depended on the ease with which the displaced halogen could diffuse away from the parent molecule and avoid recombination.

TL;DR: In this article, the TEM image contrast transfer mechanism is briefly reviewed with emphasis on practical conclusions, and it is recommended for routine imaging of very small particles on amorphous substrates.

TL;DR: In this article, small colloidal particles of platinum have been produced with and without a protective agent (polyvinylpyrrolidone), and have been studied by high resolution electron microscopy.

TL;DR: In this paper, a method for the determination of the depth of a macroscopical lattice defect, e.g., a dislocation, in a semiconductor diode using EBIC and CL contrast measurements from the same defect was proposed.

TL;DR: In this paper, surface imaging in a transmission electron microscope by diffraction contrast is compared with imaging by focus-dependent phase contrast, and the advantages and disadvantages of both methods are discussed.

TL;DR: In this paper, it has been shown that the lack of parallelism is outside the control of the operator and is proportional to the diameter of the illuminated area, and that the effect is large and should be taken into account when using techniques where parallel illumination is desired.

TL;DR: In this paper, an image reconstruction procedure was described that utilizes electron microdiffraction patterns from overlapping regions, and the autocorrelation function was calculated for an array of beam positions surrounding the sample area of interest.

TL;DR: In this paper, surface-diffusion-induced aging processes have been observed in epitaxial Au films on Ag(111) which were prepared by vapour deposition at 30°C and subsequently annealed at temperatures between 100 and 210°C.

TL;DR: In this paper, the authors observed void-like objects (voidites) with diameters of up to 7 nm in some type Ia diamonds, and the voidites appear to be associated with the decomposition of platelets.

TL;DR: In this paper, three-dimensional reconstructions were performed from tilt series of a rotary-shadowed regular bacterial surface layer and two series, representing the two surfaces of the HPI layer, were processed.

TL;DR: In this paper, the relative values of the anisotropic surface free energy of several metallic powders have been obtained by examining the crystallography of ultrafine particles (i.e.