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

Absolute and Local Extreme Values01:22

Absolute and Local Extreme Values

86
The highest and lowest values of a function, relative to a reference axis, are known as extreme values. These include absolute maximum and absolute minimum values, which represent the highest and lowest points the function reaches across its entire domain. Within a restricted portion of the function, the highest and lowest values are referred to as local maximum and local minimum values, respectively.Periodic functions, such as sine and cosine, show extreme values at infinitely many points due...
86
Autoxidation of Ethers to Peroxides and Hydroperoxides02:23

Autoxidation of Ethers to Peroxides and Hydroperoxides

9.7K
Ethers represent a class of chemical compounds that become more dangerous with prolonged storage because they tend to form explosive peroxides when standing in the air. Autoxidation is the spontaneous oxidation of a compound in air. In the presence of oxygen, ethers slowly oxidize to form hydroperoxides and dialkyl peroxides.
9.7K
Regioselectivity of Electrophilic Additions-Peroxide Effect02:35

Regioselectivity of Electrophilic Additions-Peroxide Effect

10.9K
In the presence of organic peroxides, the addition of hydrogen bromide to an alkene yields the isomer that is not predicted by Markovnikov’s rule. For example, the addition of hydrogen bromide to 2-methylpropene in the presence of peroxides gives 1-bromo-2-methylpropane. This addition reaction proceeds via a free radical mechanism, which reverses the regioselectivity. The free radical reaction mechanism involves three stages: initiation, propagation, and termination.
10.9K
Leveling Effect01:29

Leveling Effect

1.4K
In acid-base chemistry, the leveling effect refers to the limitation imposed by the solvent on the strength of acids and bases in solution. When a base stronger than the solvent's conjugate base is used, it deprotonates the solvent until the base is entirely consumed, making it ineffective against weaker acids. Conversely, an acid stronger than the solvent's conjugate acid protonates the solvent until the acid is depleted, rendering it ineffective against weaker bases. Essentially, the...
1.4K
High-Level and Low-Level Awareness01:19

High-Level and Low-Level Awareness

786
Controlled processes in human consciousness represent high-alert mental states where individuals deliberately focus their attention on achieving specific goals. Controlled processes can be seen in situations like mastering new technology, where a person might become so absorbed that they ignore surrounding distractions. Such processes involve selective attention, requiring one to concentrate on particular elements of experience while disregarding others. These are governed by executive...
786
Levels of Organization01:09

Levels of Organization

141.7K
Biological organization is the classification of biological structures, ranging from atoms at the bottom of the hierarchy to the Earth's biosphere. Each level of the hierarchy represents an increase in complexity that builds upon the previous level.
Molecules Are Composed of Atoms, and Biomolecules Are Assembled from Molecules:
The most basic levels include atoms, molecules, and biomolecules. Atoms, the smallest unit of ordinary matter, are composed of a nucleus and electrons. Molecules...
141.7K

You might also read

Related Articles

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

Sort by
Same author

Surface-potential threshold gating selective Co(IV)O formation over Co-O<sub>5</sub> sites in monolithic MOF aerogels for fast water decontamination.

Chemical communications (Cambridge, England)·2026
Same author

Active ROP2 triggers leaf senescence and orchestrates the growth-senescence trade-off under nitrogen starvation.

Plant signaling & behavior·2026
Same author

Rejuvenated Amorphous Alloys: Processing Methods, Microstructures and Mechanical Properties.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Dynamic variations of metal-O bonding in electro- and thermo-catalytic activation processes.

Nature communications·2026
Same author

Superlattice Architectures for Advancing Photothermal Catalysis: Mechanisms and Applications.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Light-driven reforming of methane through photothermal catalysis.

Nature reviews. Chemistry·2026

Related Experiment Video

Updated: Feb 12, 2026

Cell-free Biochemical Fluorometric Enzymatic Assay for High-throughput Measurement of Lipid Peroxidation in High Density Lipoprotein
07:29

Cell-free Biochemical Fluorometric Enzymatic Assay for High-throughput Measurement of Lipid Peroxidation in High Density Lipoprotein

Published on: October 12, 2017

9.8K

Pt-Free microengines at extremely low peroxide levels.

Heng Ye1, Guofeng Ma2, Jian Kang1

  • 1Department of Chemical Engineering, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia. shaobin.wang@curtin.edu.au.

Chemical Communications (Cambridge, England)
|April 7, 2018
PubMed
Summary
This summary is machine-generated.

Iron oxide-modified manganese dioxide (FeOx-MnO2) micromotors achieve high performance using extremely low hydrogen peroxide (H2O2) fuel concentrations. These advanced micromotors demonstrate superior speed and efficiency compared to traditional platinum-based designs.

More Related Videos

Simultaneous Measurement of Superoxide/Hydrogen Peroxide and NADH Production by Flavin-containing Mitochondrial Dehydrogenases
08:57

Simultaneous Measurement of Superoxide/Hydrogen Peroxide and NADH Production by Flavin-containing Mitochondrial Dehydrogenases

Published on: February 24, 2018

10.5K
Microengineering 3D Collagen Hydrogels with Long-Range Fiber Alignment
07:12

Microengineering 3D Collagen Hydrogels with Long-Range Fiber Alignment

Published on: September 7, 2022

2.8K

Related Experiment Videos

Last Updated: Feb 12, 2026

Cell-free Biochemical Fluorometric Enzymatic Assay for High-throughput Measurement of Lipid Peroxidation in High Density Lipoprotein
07:29

Cell-free Biochemical Fluorometric Enzymatic Assay for High-throughput Measurement of Lipid Peroxidation in High Density Lipoprotein

Published on: October 12, 2017

9.8K
Simultaneous Measurement of Superoxide/Hydrogen Peroxide and NADH Production by Flavin-containing Mitochondrial Dehydrogenases
08:57

Simultaneous Measurement of Superoxide/Hydrogen Peroxide and NADH Production by Flavin-containing Mitochondrial Dehydrogenases

Published on: February 24, 2018

10.5K
Microengineering 3D Collagen Hydrogels with Long-Range Fiber Alignment
07:12

Microengineering 3D Collagen Hydrogels with Long-Range Fiber Alignment

Published on: September 7, 2022

2.8K

Area of Science:

  • Nanotechnology
  • Materials Science
  • Catalysis

Background:

  • Micro/nanomotors (MNMs) are engineered particles capable of autonomous movement.
  • Catalytic MNMs rely on chemical reactions for propulsion, often requiring specific fuel concentrations.
  • Platinum-based catalysts are commonly used but can be expensive and require higher fuel loads.

Purpose of the Study:

  • To develop novel micromotors with enhanced catalytic activity and efficiency.
  • To investigate the performance of iron oxide-modified MnO2 (FeOx-MnO2) catalysts in micromotors.
  • To evaluate micromotor performance at extremely low hydrogen peroxide (H2O2) fuel concentrations.

Main Methods:

  • Fabrication of FeOx-MnO2 catalyzed micromotors using electrochemical co-reduction.
  • Graphene/FeOx-MnO2 microtubes were synthesized for motion studies.
  • Performance evaluation was conducted at varying, low H2O2 concentrations.

Main Results:

  • Graphene/FeOx-MnO2 microtubes exhibited motion at H2O2 concentrations as low as 0.03%.
  • This performance is nearly an order of magnitude lower than typical Pt-based micromotors (0.2% H2O2).
  • The FeOx-MnO2 micromotors achieved higher speeds than previously reported catalytic MNMs at low fuel levels.

Conclusions:

  • FeOx-MnO2 systems represent superior catalytic MNMs due to excellent activity and robustness.
  • The fabrication is straightforward, and the materials are low-cost, biocompatible, and abundant.
  • These findings highlight significant potential for FeOx-MnO2 micromotors in various applications.