Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Preparation of Samples for Electron Microscopy01:20

Preparation of Samples for Electron Microscopy

7.3K
To be visualized by an electron microscope, either transmission or scanning, biological samples need to be fixed (stabilized) so the electron beam does not destroy them and dried thoroughly (desiccated/dehydrated) so the vacuum does not affect them. Fixation needs to be done as quickly as possible because the sample properties will start changing as soon as it is removed from its natural environment. For example, in a tissue sample, the oxygen levels begin decreasing, causing an altered...
7.3K
Photoluminescence: Applications01:14

Photoluminescence: Applications

1.1K
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
1.1K
Carbon-dioxide Fixation01:28

Carbon-dioxide Fixation

753
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
753

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Molecular characteristics and antimicrobial susceptibility profiling of carbapenem-resistant Pseudomonas aeruginosa clinical isolates in Korea: Implications for novel β-lactam therapy.

Journal of global antimicrobial resistance·2026
Same author

Cross-shore heterogeneity in organic carbon storage and source composition in bare tidal flats of South Korea.

Marine pollution bulletin·2026
Same author

Cell type-dependent induction of type I interferon and PARP1 activation in astrocytes and neurons during chikungunya virus infection.

Microbiology spectrum·2026
Same author

Interphase-Engineering of Fe-Doped α-Mo<b><sub>15</sub></b>Se<b><sub>19</sub></b>/CoSeO<b><sub>3</sub></b> Nanosheet Arrays via In Situ Oxidation-Selenization on Conductive Carbon Fabric for Efficient Bifunctional Water Splitting.

ACS applied materials & interfaces·2026
Same author

Longitudinal profiling reveals immune dynamics and distinct plasma cell signatures during B-cell depletion in IgG4-related disease.

Annals of the rheumatic diseases·2026
Same author

Integrating habitat suitability, socioeconomics, and infrastructure to assess global biological invasion risk under climate change: A case study of the rice stem borer, Chilo suppressalis.

Pest management science·2026

Related Experiment Video

Updated: Feb 17, 2026

Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization
06:58

Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization

Published on: July 12, 2016

10.0K

High-Performance Field Emission from a Carbonized Cork.

Jeong Seok Lee1, Hak Jun Lee1, Jae Man Yoo1

  • 1School of Mechanical and Aerospace Engineering, Seoul National University , Seoul 151-742, South Korea.

ACS Applied Materials & Interfaces
|November 30, 2017
PubMed
Summary
This summary is machine-generated.

Carbonized cork offers a novel, lightweight material for field emitters, enabling broader electron beam applications. This natural material provides high current density and stability with a low turn-on field.

Keywords:
carbonizationcorkelectron beam generatorfield emissionfield emittergraphitic sheetlow turn-on field

More Related Videos

Preparing a Celadonite Electron Source and Estimating Its Brightness
09:14

Preparing a Celadonite Electron Source and Estimating Its Brightness

Published on: November 5, 2019

4.9K
Performing In Situ Closed-Cell Gas Reactions in the Transmission Electron Microscope
14:21

Performing In Situ Closed-Cell Gas Reactions in the Transmission Electron Microscope

Published on: July 24, 2021

4.5K

Related Experiment Videos

Last Updated: Feb 17, 2026

Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization
06:58

Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization

Published on: July 12, 2016

10.0K
Preparing a Celadonite Electron Source and Estimating Its Brightness
09:14

Preparing a Celadonite Electron Source and Estimating Its Brightness

Published on: November 5, 2019

4.9K
Performing In Situ Closed-Cell Gas Reactions in the Transmission Electron Microscope
14:21

Performing In Situ Closed-Cell Gas Reactions in the Transmission Electron Microscope

Published on: July 24, 2021

4.5K

Area of Science:

  • Materials Science
  • Physics
  • Nanotechnology

Background:

  • Electron beam applications require miniature, lightweight, low-power field emitters.
  • Existing nanocarbon emitters have limitations in performance and fabrication.

Purpose of the Study:

  • To introduce carbonized cork as a novel material for field electron emitters.
  • To evaluate the performance and fabrication advantages of cork-based field emitters.

Main Methods:

  • Natural cork was carbonized to create a graphitic honeycomb structure.
  • The structural properties (wall thickness, aspect ratio) were analyzed.
  • Field electron emission performance (current density, stability, turn-on field) was measured and compared to nanocarbon emitters.

Main Results:

  • Carbonized cork forms a graphitic honeycomb with cell walls 100-200 nm thick and aspect ratio >100.
  • Cork emitters demonstrated high current density and long-term stability.
  • A low turn-on field was achieved, outperforming nanocarbon emitters.
  • Fabrication is simple, allowing for customizable emitter shapes (point, line, planar).

Conclusions:

  • Carbonized cork is a promising, easily fabricated material for high-performance field electron emitters.
  • Its unique structure offers advantages over traditional nanocarbon materials.
  • The material's versatility supports diverse electron beam applications.