Backscattered Electron Imaging
Backscattered Electron Imaging - Related Videos
03:25
Imaging of Neuronal Mitochondria Using a Serial Block-Face Scanning Electron Microscope
0 Views •
2025
Source: Mukherjee, K., et. al. Analysis of Brain Mitochondria Using Serial Block-Face Scanning Electron Microscopy. J. Vis. Exp. (2016)This video demonstrates the preparation, imaging, and analysis of mouse brain tissue using a serial block-face scanning electron microscope (SBFSEM) to visualize mitochondrial ultrastructure, enabling precise mapping of their morphology and spatial distribution in axonal and dendritic neuronal compartments.
11:41
Scanning Electron Microscopy (SEM)
0 Views •
2023
Source: Laboratory of Dr. Andrew J. Steckl — University of Cincinnati A scanning electron microscope, or SEM, is a powerful microscope that uses electrons to form an image. It allows for imaging of conductive samples at magnifications that cannot be achieved using traditional microscopes. Modern light microscopes can achieve a magnification of ~1,000X, while typical SEM can reach magnifications of more than 30,000X. Because the SEM doesn’t use light to create images, the resulting pictures it...
11:14
Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
0 Views •
Cited by 4 •
2016
The optical, electrical, and structural properties of dislocations and of grain boundaries in semiconductor materials can be determined by experiments performed in a scanning electron microscope. Electron microscopy has been used to investigate cathodoluminescence, electron beam induced current, and diffraction of backscattered electrons.
07:50
Electron Channeling Contrast Imaging for Rapid III-V Heteroepitaxial Characterization
0 Views •
Cited by 22 •
2015
The use of electron channeling contrast imaging in a scanning electron microscope to characterize defects in III-V/Si heteroexpitaxial thin films is described. This method yields similar results to plan-view transmission electron microscopy, but in significantly less time due to lack of required sample preparation.
01:25
Electron Microscopic Analysis of Myelin Damage in a Rat Model of Optic Nerve Injury
0 Views •
2025
The control section exhibits axons with tightly packed myelin sheaths containing concentric plasma membrane layers. The injured section exhibits decompacted myelin with large gaps.
FAQs
Image brightness primarily reflects the specimen’s atomic-number distribution. Regions containing elements with higher atomic numbers generally scatter more electrons back toward the detector, producing stronger signals and brighter areas. This contrast allows researchers to distinguish compositional domains, inclusions, particles, and phases within a solid even when those regions may not be readily differentiated by appearance alone.
Elastic interactions allow incident electrons to return from the specimen while retaining high energy. Detecting these returning electrons produces a signal linked to how atoms in different regions scatter the beam. Because the detector records this backscattered population, variations in signal intensity can reveal compositional differences across the examined solid and help map chemically distinct domains.
Backscattered Electron Imaging primarily supplies spatial contrast associated with differences in atomic number, whereas energy-dispersive X-ray spectroscopy is an elemental technique used alongside it. The image can show where distinct phases or inclusions occur, while elemental analysis can help evaluate their composition. Using both approaches gives chemistry and materials researchers complementary structural and compositional information.
A focused electron beam is directed onto the specimen inside a scanning electron microscope. As the beam interacts elastically with atoms, some high-energy electrons return from the material. A detector measures these electrons and converts differences in their signal into image contrast, allowing researchers to examine the distribution of compositionally distinct regions in a solid.
The technique is useful for examining catalysts, minerals, alloys, ceramics, and geological samples. In these materials, researchers may need to locate phases, inclusions, particles, or compositional domains rather than view the sample as chemically uniform. Atomic-number contrast helps separate such regions and supports interpretation of heterogeneous solids in chemistry and materials analysis.
A brighter region generally indicates a stronger backscattered-electron signal and may contain elements with higher atomic numbers than a darker neighboring region. Brightness alone does not identify a specific element, so interpretation is comparative and compositional. Researchers can combine the image with energy-dispersive X-ray spectroscopy to relate visible domains to elemental information.