scholarly journals In-line three-dimensional holography of nanocrystalline objects at atomic resolution

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
F.-R. Chen ◽  
D. Van Dyck ◽  
C. Kisielowski
Keyword(s):  
Three Dimensional ◽  
Atomic Resolution

Electron crystallographic determination of the 3-D structure of staurolite at atomic resolution

1991 ◽  
Vol 49 ◽  
pp. 540-541
Author(s):  
Kenneth H. Downing ◽  
Hu Meisheng ◽  
Hans-Rudolf Went ◽  
Michael A. O'Keefe
Keyword(s):  
High Resolution ◽  
Three Dimensional ◽  
High Resolution Electron Microscopy ◽  
Atomic Resolution ◽  
Dimensional Structure ◽  
Structure Information ◽  
Resolution Electron ◽  
Scattering Effects ◽  
High Resolution Images ◽  
Effects Of Radiation

With current advances in electron microscope design, high resolution electron microscopy has become routine, and point resolutions of better than 2Å have been obtained in images of many inorganic crystals. Although this resolution is sufficient to resolve interatomic spacings, interpretation generally requires comparison of experimental images with calculations. Since the images are two-dimensional representations of projections of the full three-dimensional structure, information is invariably lost in the overlapping images of atoms at various heights. The technique of electron crystallography, in which information from several views of a crystal is combined, has been developed to obtain three-dimensional information on proteins. The resolution in images of proteins is severely limited by effects of radiation damage. In principle, atomic-resolution, 3D reconstructions should be obtainable from specimens that are resistant to damage. The most serious problem would appear to be in obtaining high-resolution images from areas that are thin enough that dynamical scattering effects can be ignored.

High-yield fabrication of suspended two-dimensional materials for atomic resolution imaging

RSC Advances ◽  
2016 ◽  
Vol 6 (80) ◽  
pp. 76273-76279 ◽  
Author(s):  
Jaehyun Han ◽  
Jun-Young Lee ◽  
Jeongun Choe ◽  
Jong-Souk Yeo
Keyword(s):  
Three Dimensional ◽  
Atomic Resolution ◽  
High Yield ◽  
Two Dimensional ◽  
Two Dimensional Materials ◽  
Resolution Imaging

Two-dimensional (2D) atomic crystals are very interesting materials due to their unique properties, which are significantly different than those observed in conventional three-dimensional (3D) materials.

scholarly journals Visualising the Three-dimensional Morphology and Surface Structure of Metallic Nanoparticles at Atomic Resolution by Automated HAADF STEM Atom Counting

2014 ◽  
Vol 20 (S3) ◽  
pp. 60-61
Author(s):  
Lewys Jones ◽  
Vidar T. Fauske ◽  
Katherine E. MacArthur ◽  
Antonius T. J. van Helvoort ◽  
Peter D. Nellist
Keyword(s):  
Surface Structure ◽  
Metallic Nanoparticles ◽  
Three Dimensional ◽  
Atomic Resolution ◽  
Atom Counting

Towards three-dimensional structural determination of amorphous materials at atomic resolution

2013 ◽  
Vol 88 (10) ◽  
Author(s):  
Chun Zhu ◽  
Chien-Chun Chen ◽  
Jincheng Du ◽  
Michael R. Sawaya ◽  
M. C. Scott ◽  
...  
Keyword(s):  
Amorphous Materials ◽  
Three Dimensional ◽  
Atomic Resolution ◽  
Structural Determination

Three-dimensional imaging of dislocations in a nanoparticle at atomic resolution

Nature ◽  
2013 ◽  
Vol 496 (7443) ◽  
pp. 74-77 ◽  
Author(s):  
Chien-Chun Chen ◽  
Chun Zhu ◽  
Edward R. White ◽  
Chin-Yi Chiu ◽  
M. C. Scott ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Atomic Resolution ◽  
Three Dimensional Imaging

scholarly journals Probing three-dimensional surface force fields with atomic resolution: Measurement strategies, limitations, and artifact reduction

2012 ◽  
Vol 3 ◽  
pp. 637-650 ◽  
Author(s):  
Mehmet Z Baykara ◽  
Omur E Dagdeviren ◽  
Todd C Schwendemann ◽  
Harry Mönig ◽  
Eric I Altman ◽  
...  
Keyword(s):  
Force Fields ◽  
Image Interpretation ◽  
Three Dimensional ◽  
Surface Force ◽  
Interaction Force ◽  
Atomic Scale ◽  
Atomic Resolution ◽  
Spatial Dimensions ◽  
Scale Properties ◽  
Measurement Strategies

Noncontact atomic force microscopy (NC-AFM) is being increasingly used to measure the interaction force between an atomically sharp probe tip and surfaces of interest, as a function of the three spatial dimensions, with picometer and piconewton accuracy. Since the results of such measurements may be affected by piezo nonlinearities, thermal and electronic drift, tip asymmetries, and elastic deformation of the tip apex, these effects need to be considered during image interpretation. In this paper, we analyze their impact on the acquired data, compare different methods to record atomic-resolution surface force fields, and determine the approaches that suffer the least from the associated artifacts. The related discussion underscores the idea that since force fields recorded by using NC-AFM always reflect the properties of both the sample and the probe tip, efforts to reduce unwanted effects of the tip on recorded data are indispensable for the extraction of detailed information about the atomic-scale properties of the surface.

scholarly journals Structure of the Macrobrachium rosenbergii Nodavirus: A new genus within the Nodaviridae?

2018 ◽  
Author(s):  
Kok Lian Ho ◽  
Mads Gabrielsen ◽  
Poay Ling Beh ◽  
Chare Li Kueh ◽  
Qiu Xian Thong ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Macrobrachium Rosenbergii ◽  
Atomic Resolution ◽  
Freshwater Prawn ◽  
Economic Losses ◽  
Capsid Shell ◽  
Long Range Interactions ◽  
Virion Structure ◽  
Resolution Model ◽  
Resolution Structure

AbstractMacrobrachium rosenbergii nodavirus (MrNV) is a pathogen of freshwater prawns that poses a threat to food-security and causes significant economic losses in the aquaculture industries of many developing nations. A detailed understanding of the MrNV virion structure will inform the development of strategies to control outbreaks. The MrNV capsid has also been engineered to display heterologous antigens, thus knowledge of its atomic resolution structure will benefit efforts to develop tools based on this platform. Here we present an atomic-resolution model of the MrNV capsid protein, calculated by cryogenic electron microscopy (cryoEM) of MrNV virus-like particles (VLPs) produced in insect cells, and three-dimensional image reconstruction at 3.3 Å resolution. CryoEM of MrNV virions purified from infected freshwater prawn post-larvae yielded a 6.6 Å resolution structure confirming the biological relevance of the VLP structure.Our data revealed that unlike other known nodaviruses structures, which have been shown to assemble capsids having trimeric spikes, MrNV assembles a T=3 capsid with dimeric spikes. We also found a number of surprising similarities between the MrNV capsid structure and that of the Tombusviridae. 1. An extensive network of N-terminal arms lines the capsid interior forming long-range interactions to lace together asymmetric units. 2. The capsid shell is stabilised by three pairs of Ca2+ ions in each asymmetric unit. 3. The protruding spike domain exhibits a very similar fold to that seen in the spikes of the tombusviruses. These structural similarities raise questions concerning the correct taxonomic classification of MrNV.

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