Related Experiment Video
Updated: Apr 1, 2026
11:54
Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles
Published on: June 25, 2018
10.9K
Bubble nucleation and migration in a lead-iron hydr(oxide) core-shell nanoparticle
Kaiyang Niu1, Timofey Frolov2, Huolin L Xin1
1Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720;
Summary
Researchers observed gas bubble formation and movement within iron hydroxide nanoparticles during transformation to iron oxide. This provides new insights into gas transport mechanisms in crystal lattices, crucial for understanding materials science and corrosion processes.
Area of Science:
- Materials Science
- Nanotechnology
- Solid-State Chemistry
Background:
- Iron hydroxide transformations are relevant to biominerals and steel corrosion.
- Gas transport through crystal lattices during these transformations remains poorly understood.
Purpose of the Study:
- To investigate the nucleation and migration of gas bubbles in iron (hydr)oxide.
- To elucidate the mechanisms of gas transport during the transformation of iron hydroxide to iron oxide.
Main Methods:
- In situ observation using transmission electron microscopy (TEM).
- Utilizing Pb-FeOOH model core-shell nanoparticles in a liquid cell.
- Employing geometric phase analysis (GPA) for lattice strain analysis.
Main Results:
- Electron irradiation induced the transformation of iron hydroxide to iron oxide, generating gas bubbles.
- Observed nucleation and migration of gas bubbles through the nanoparticle shell.
- Identified inhomogeneous strain fields around bubbles using GPA.
Conclusions:
- Elastic interactions between the core and gas bubbles drive bubble migration.
- Provides a fundamental understanding of gas transport in crystalline materials.
- Offers insights into processes like corrosion and material degradation.
Related Concept Videos
01:16Precipitate Formation and Particle Size Control
7.2K
In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
7.2K
01:09Colloidal precipitates
6.8K
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
6.8K