In-depth fine structure of carbon micropores with positron annihilation lifetime spectroscopy
Abstract
The detailed pore structure analysis of nanoporous carbons is essential for designing high-performance materials for clean-energy technologies. We used activated carbon fibres (ACFs) with average pore sizes of 0.8 and 1.3 nm. Using an ACF-polytetrafluoroethylene sample, the carbon-specific positron annihilation lifetime (CS-PAL) of the ACF was determined based on the lifetime versus ACF content relationship. Pore sizes determined by CS-PAL spectroscopy were smaller than those reported by Ar adsorption: ACFs of 0.8 and 1.3 nm were 0.4 and 0.2 nm, respectively, suggesting that the 0.8 nm-ACF exhibited single-layered graphitic islands within the pore and the 1.3 nm-ACF had plain pore walls.
Fields of Study & Subjects
Muon and positron interactions and applications
Fullerene Chemistry and Applications
Atomic and Molecular Physics
Publication details
- Journal / source
- Chemical Physics Letters
- Publisher
- Elsevier BV
- Volume
- 890
- Pages
- 142741–142741
- Publication date
- 4 March 2026
- Language
- EN