J
John M. Cowley
Researcher at Arizona State University
Publications - 226
Citations - 5869
John M. Cowley is an academic researcher from Arizona State University. The author has contributed to research in topics: Scanning transmission electron microscopy & Diffraction. The author has an hindex of 41, co-authored 226 publications receiving 5672 citations. Previous affiliations of John M. Cowley include University of Utah & Northwest University (United States).
Papers
More filters
Journal ArticleDOI
Transmission electron microscopy of synthetic 2- and 6-line ferrihydrite
TL;DR: In this article, high-resolution transmission electron microscopy (HRTEM), selected-area electron diffraction (SAED), annular dark-field scanning transmission electron microscope (STEM) images, and electron nano-diffraction were used to examine structures of synthetic 2- and 6-line ferrihydrite specimens.
Journal ArticleDOI
Crystalline Boron Nanowires
Carolyn Jones Otten,Oleg R. Lourie,Min-Feng Yu,John M. Cowley,Mark J. Dyer,Rodney S. Ruoff,William E. Buhro +6 more
TL;DR: CVD growth of elemental boron nanowires are described, which are found to be dense nanowhiskers rather than nanotubes, and conductivity measurements establish that they are semiconducting, with electrical properties consistent with those of elementalboron.
Journal ArticleDOI
Nomenclature of Polytype Structures Report of the International Union of Crystallography Ad-Hoc Committee on the Nomenclature of Disordered, Modulated and Polytype Structures*
A. Guinier,G. B. Bokij,K. Boll-Dornberger,John M. Cowley,S. Ďurovič,H. Jagodzinski,P. S. R. Krishna,P. M. de Wolff,B. B. Zvyagin,D. E. Cox,P. Goodman,Th. Hahn,K. Kuchitsu,S. C. Abrahams +13 more
TL;DR: In this article, two kinds of symbolism are recommended for use with either simple or complicated polytypic structures: symbolic symbols in a modified Gard notation and descriptive symbols based on earlier proposals by Dornberger-Schiff, I)urovi~ and Zvyagin.
Journal ArticleDOI
Structure of synthetic 2-line ferrihydrite by electron nanodiffraction
TL;DR: In this article, a comparison of experimental single-crystal electron diffraction patterns of synthetic two-line ferrihydrite (2LFh) with simulated single crystal electron-diffraction patterns indicates that both nanocrystalline structures represent local extremes of three-dimensional ordering.
Journal ArticleDOI
Twenty forms of electron holography
TL;DR: In this paper, a simplified, one-dimensional, theoretical description of the holograms and possible methods for reconstruction is given to allow ready comparison of the various modes of electron holography, distinctly different in either their theoretical basis or their experimental requirements.