The Electrochemically Formed Palladium-Deuterium System. I. Surface Composition and Morphology

1993 ◽  
Vol 46 (5) ◽  
pp. 663 ◽  
Author(s):  
CT Dillon ◽  
BJ Kennedy
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Analysis ◽  
Surface Composition ◽  
Surface Topology ◽  
Platinum Anode ◽  
Single Feature ◽  
Scanning Electron

Surface analysis of palladium cathodes after prolonged electrolysis in D2O electrolytes shows evidence for the electrodeposition of Pt, Zn and Cu. The platinum comes from the platinum anode used in the work, whilst zinc and copper are present in the D2O. Scanning electron microscopy studies of cast palladium cathodes revealed a diverse surface topology with no single feature present. The effect of electrode pretreatment on the appearance of the microcrystallites is discussed, and evidence for a palladized overlay is presented.

Polarization of Ti6Al4V alloy in NaBr electrolyte and surface fractal analysis

2016 ◽  
Vol 232 (7) ◽  
pp. 602-609
Author(s):  
Yafeng He ◽  
Wenzhuang Lu ◽  
Weiming Gan ◽  
Jianshe Zhao ◽  
Dunwen Zuo
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Titanium Alloy ◽  
Electrochemical Machining ◽  
Test System ◽  
Surface Topology ◽  
Electrochemical Test ◽  
Polarization Characteristics ◽  
The Relationship ◽  
Scanning Electron

Electrochemical machining is a promising method for titanium alloy processing. The polarization characteristics of Ti6Al4V were studied in detail in order to provide a deeper understanding of this method. The polarization curve of the alloy, which shows the relationship between current density and potential under an external electric field, was obtained in NaBr electrolyte at three different concentrations in a three-electrode electrochemical test system. The surface topography of the polarization zone and pits was examined by scanning electron microscopy, and their fractal features were calculated by the picture point cover method. The results show that Ti6Al4V in the more concentrated electrolyte has higher dissolution rate, lower decomposition potential, and more uniform surface topology in the polarization areas.

scholarly journals New insights into sperm ultrastructure through enhanced scanning electron microscopy

2020 ◽  
Author(s):  
Denis Korneev ◽  
D. Jo Merriner ◽  
Gediminas Gervinskas ◽  
Alex de Marco ◽  
Moira K O’Bryan
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Surface Topology ◽  
Sperm Ultrastructure ◽  
Fibrous Sheath ◽  
Domain Specific ◽  
Coated Surfaces ◽  
Scanning Electron

AbstractThe analysis of spermatozoa morphology is fundamental to understand male fertility and the aetiology of infertility. Traditionally scanning electron microscopy (SEM) has been used to define surface topology. Recently, however, it has become a critical tool for three-dimensionally analyse of internal cellular ultrastructure. Modern SEM provides nanometer-scale resolution, but the meaningfulness of such information is proportional to the quality of the sample preservation. In this study, we demonstrate that sperm quickly and robustly adhere to gold-coated surfaces. Leveraging this property, we developed three step-by-step protocols fulfilling different needs for sperm imaging: chemically fixed monolayers for SEM examination of the external morphology, and two high-pressure freezing-based protocols for fast SEM examination of full cell internal morphology and focused ion-beam SEM (FIB-SEM) tomography. These analyses allow previously unappreciated insights into mouse sperm ultrastructure, including the identification of novel structures within the fibrous sheath and domain-specific interactions between the plasma membrane and exosome-like structures.

scholarly journals New Insights Into Sperm Ultrastructure Through Enhanced Scanning Electron Microscopy

2021 ◽  
Vol 9 ◽  
Author(s):  
Denis Korneev ◽  
D. Jo Merriner ◽  
Gediminas Gervinskas ◽  
Alex de Marco ◽  
Moira K. O’Bryan
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Three Dimensional ◽  
Surface Topology ◽  
Sperm Ultrastructure ◽  
Fibrous Sheath ◽  
Coated Surfaces ◽  
Scanning Electron

The analysis of spermatozoa morphology is fundamental to understand male fertility and the etiology of infertility. Traditionally scanning electron microscopy (SEM) has been used to define surface topology. Recently, however, it has become a critical tool for three-dimensional analysis of internal cellular ultrastructure. Modern SEM provides nanometer-scale resolution, but the meaningfulness of such information is proportional to the quality of the sample preservation. In this study, we demonstrate that sperm quickly and robustly adhere to gold-coated surfaces. Leveraging this property, we developed three step-by-step protocols fulfilling different needs for sperm imaging: chemically fixed monolayers for SEM examination of the external morphology, and two high-pressure freezing-based protocols for fast SEM examination of full cell internal morphology and focused ion-beam SEM tomography. These analyses allow previously unappreciated insights into mouse sperm ultrastructure, including the identification of novel structures within the fibrous sheath and domain-specific interactions between the plasma membrane and exosome-like structures.

Processability of Composite Materials Containing Chitosan

1990 ◽  
Vol 218 ◽  
Author(s):  
G. Graham Allan ◽  
Mutombo Muvundamina
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Composite Materials ◽  
Electron Spectroscopy ◽  
Surface Composition ◽  
Polypropylene Fibers ◽  
Acidic Solutions ◽  
Foreign Materials ◽  
Wetting Force ◽  
Scanning Electron

AbstractThe processability of polypropylene fibers into composite materials was characterized by dynamic wettability measurements. Single fibers were immersed in a series of aqueous acidic solutions of chitosan. Variations in the wetting force, observed for progressive and successive immersions of the fibers in the liquid, indicated adsorption of species out of the solution or the presence of foreign materials on the surface of the solid. The value of the advancing wetting force was used to assess the coating of the fibers by the liquid. Data on the surface composition of the fibers were obtained by electron spectroscopy for chemical analysis. The conditions of preparation of the composite materials containing chitosan were determined from the correlation of the observations on wettability, surface composition and scanning electron microscopy.

scholarly journals Surface Analysis of MF–Aluminas and Related Supported Reagents by Scanning Electron Microscopy

1986 ◽  
Vol 59 (10) ◽  
pp. 3281-3282 ◽  
Author(s):  
Takashi Ando ◽  
James H. Clark ◽  
David G. Cork ◽  
Takahide Kimura
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Analysis ◽  
Scanning Electron

Back-scattered and secondary electron images of scanning electron microscopy in dentistry: a new method for surface analysis

2012 ◽  
Vol 70 (6) ◽  
pp. 603-609 ◽  
Author(s):  
Mohammad Ali Saghiri ◽  
Kamal Asgar ◽  
Mehrdad Lotfi ◽  
Kasra Karamifar ◽  
Ali Mohammad Saghiri ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Analysis ◽  
Secondary Electron ◽  
New Method ◽  
Scanning Electron
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