EFFECT OF INTERCALATION AND EXFOLIATION ON POSITRON-ANNIHILATION LIFETIMES IN GRAPHITES

Authors
ADONKIN VT GORELOV BM DYAKIN VV KARPOV II PRIKHODKO GP
Citation
Vt. Adonkin et al., EFFECT OF INTERCALATION AND EXFOLIATION ON POSITRON-ANNIHILATION LIFETIMES IN GRAPHITES, Journal of physics and chemistry of solids, 55(5), 1994, pp. 443-446
Citations number
11
Categorie Soggetti
Physics, Condensed Matter",Chemistry
Journal title
Journal of physics and chemistry of solids → ACNP
ISSN journal
00223697
Volume
55
Issue
5
Year of publication
1994
Pages
443 - 446
Database
ISI
SICI code
0022-3697(1994)55:5<443:EOIAEO>2.0.ZU;2-S
Abstract
The influence of intercalation and exfoliation on the electron density of graphene layers and the defect subsystem of natural graphites was investigated by positron lifetime spectroscopy. In natural graphites. two positron annihilation channels with tau1 = 154-228 ps and tau2 = 3 78-615 ps were observed. Intercalation and exfoliation generate a thir d channel with tau3 = 1.87-2.18 ns caused by positronium annihilation of defects. The effect of pressing on the annihilation parameters was studied, and an analysis of experimental results carried out.