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75th annual meeting of the Japanese Society of Microscopy, June 17–19, 2019, Nagoya, Japan

75th annual meeting of the Japanese Society of Microscopy, June 17–19, 2019, Nagoya, Japan

Microscopical Society of Canada 2019 Annual Meeting, May 22 – 24, 2019, Vancouver, British Columbia, Canada

Electronic poster. ID #101, IMC 2018, 19th International Microscopy Congress, September 9 – 14, 2018, Sydney, Australia

Electronic poster. ID #523, IMC 2018, 19th International Microscopy Congress, September 9 – 14, 2018, Sydney, Australia

2nd e-Asia Symposium on Biological use of Nanotechnology, Sept 17 – 22, 2018, Osaka University

Meeting of the Korean Society of Microscopy, June 20 – 22, 2018, Jeju, Korea

74th Annual Meeting of the Japanese Society of Microscopy, May 29–31, 2018, Kurume, Japan

International Conference on Electron Beam Shaping in Space and Time (Q-SORT), May 27-30, 2018, Julich, Germany

73rd meeting of the Japanese Society of Microscopy, May 30 – June 1, 2017, Sapporo, Japan

RIKEN Electron Holography Workshop, February 15 – 17, 2017, Hatoyama, Japan

620th WE Heraeus Seminar, June 19 – 23, 2016, Physikzentrum Bad Honnef, Germany

43rd Annual Meeting of the Microscopical Society of Canada, June 7 – 10, 2016, Edmonton, Alberta, Canada

43rd Annual Meeting of the Microscopical Society of Canada, June 7 – 10, 2016, Edmonton, Alberta, Canada

43rd Annual Meeting of the Microscopical Society of Canada, June 7 – 10, 2016, Edmonton, Alberta, Canada

3rd Japan-UK Chromosome Workshop, Feb 11 – 12, 2016, Osaka, Japan

42nd Annual Meeting of the Microscopical Society of Canada, May 26 – 29, 2015, Hamilton, Ontario, Canada

Microscopy for Global Challenges, Touching Atoms, Molecules, Nanostructures and Cells by Multidimensional Microscopy (18th International Microscopy Congress), Sept. 7-12, 2014, Prague, Czech Republic

Microscopy for Global Challenges, Touching Atoms, Molecules, Nanostructures and Cells by Multidimensional Microscopy (18th International Microscopy Congress), Sept. 7-12, 2014, Prague, Czech Republic

Microscopy for Global Challenges, Touching Atoms, Molecules, Nanostructures and Cells by Multidimensional Microscopy (18th International Microscopy Congress), Sept. 7-12, 2014, Prague, Czech Republic

Microscopy for Global Challenges, Touching Atoms, Molecules, Nanostructures and Cells by Multidimensional Microscopy (18th International Microscopy Congress), Sept. 7-12, 2014, Prague, Czech Republic

Nondipole effects in electron energy-loss spectroscopy are evaluated in terms of deviation of the inelastic scattering from a Lorentzian angular distribution, which is assumed in established procedures for plural-scattering deconvolution, thickness measurement, and Kramers-Kronig analysis. The deviation appears to be small and may be outweighed by the effect of plural (elastic+inelastic) scattering, which is not removed by conventional deconvolution methods. In the core-loss region of the spectrum, non-Lorentzian behaviour stems from a reduction of the generalized oscillator strength from its optical value and (for energies far above an ionization threshold) formation of a Bethe-ridge angular distribution. At incident energies above 200 keV, retardation effects further distort the angular dependence, even for core losses just above threshold. With an on-axis collection aperture, non-dipole effects are masked by the rapid falloff of intensity with scattering angle, but they may become important for off-axis measurements. Near-edge fine structure is sensitive to nondipole effects but these can be minimized by use of an angle-limiting collection aperture. © 2014 Wiley Periodicals, Inc.

Amongst the various ideas that have been brought forward during the latest revival of electron phase plate imaging [1,2], we have proposed the "hole-free phase plate" (HFPP) concept [3]. In this design, the phase shift between the low- and high-frequency parts of the object spectrum is achieved by the localized charging induced by the transmitted beam impinging on a continuous thin film placed in the back focal plane. The proposed design offers several advantages over conventional phase plates (PPs): i) the charged area, comparable in size with the central spot, is automatically centred; ii) charging, the primary obstacle preventing large scale implementation of PPs so far, is turned into an advantage; iii) any microscope can accommodate a HFPP; iv) replacing an exhausted HFPP is accomplished by moving the same film by a few microns. Similarly to most other PP designs, HFPP imaging provides in-focus phase contrast resulting in imaging dose reduction at constant resolution and SNR. Drawbacks of the HFPP are the difficulty in keeping the charge under control, resulting in lack of tunability, and the peculiar image intensity that appears to combine the clean Zernike phase contrast with fringes reminiscent of Fresnel imaging. The aim of this paper is to study more in detail image formation with a HFPP, and compare it with other imaging methods to illustrate the benefits and drawbacks just mentioned., European Microscopy Congress (EMC 2012), Sept. 16-21, 2012, Manchester, U. K.

Microscopical Society of Canada Annual Meeting (2012), June 5–8, 2012, Halifax, Nova Scotia, Canada

High performance organic nanopigments are an increasingly important class of functional nanomaterials that possess physical properties ranging between molecular and bulk materials. These nanomaterials have been utilized in a variety of important commercial applications including coatings, printing, information storage, and display technologies [1]. We will discuss our recent work in developing a bottom-up approach for preparation of 3 different classes of high-performance organic nanopigments: 1) azo-laked Pigment Red 57:1 (LAK), 2) quinacridone Pigment Red 122 (QUIN), and 3) azobenzimidazolone (BZI) Pigments Yellow 151 and Red 175. The physical characteristics of the nanopigments were characterized by electron microscopy, dynamic light scattering (DLS), and powder X-ray diffraction (XRD), while their coloristic spectral properties, and dispersion thermal stability were investigated in various matrices. We identified relationships between pigment particle size and their coloristic as well as thermal stability properties for these nanopigments. High resolution transmission electron microscopy (HR-TEM) provided clear images of lattice fringes, and enabled us to determine the crystal orientation of the molecules packed within the QUIN and BZI pigment nanoparticles., 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011, 13-16 June 2011, Boston, Massachusetts, USA, Series: TechConnect Briefs

17th International Microscopy Congress, September 2010, Rio de Janeiro, Brazil

10th Inter-American Congress of Electron Microscopy 2009, CIASEM 2009, October 25-28 2009, Rosario City, Argentina

Microscopy and Microanalysis 2009, 26-30 July 2009, Richmond, Virginia, USA

36th Annual Meeting of Microscopical Society of Canada, June 17–19, 2009, Winnipeg, Manitoba, Canada

We have investigated the interaction between Pd and Ce in a (0.47 wt %) CeOₓ–Pd(1 wt %)/ α-Al₂O₃ catalyst that is used in the reforming reaction of CH₄ with CO₂. The freshly reduced catalyst was characterized by various electron microscopy techniques, such as elemental mapping, Z-contrast imaging, and electron energy-loss spectroscopy tounderstand the role of Ce on a microscopic scale. The high spatial resolution elemental mapping indicates that CeOₓ is located in close proximity of the palladium nanoparticles. High-resolution lattice images and energy-loss spectra obtained in the vicinity of the Pd particles show an anisotropic distribution of CeOₓ crystallites limited to the interface region between Pd and the substrate but not covering the surface of the Pd nanoparticles. Energy-loss near edge fine structure of Pd M edges reveals that the Pd nanoparticles are not oxidized.