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Titolo:
Local structural order in electron-irradiated graphite studied by high-resolution high-voltage electron microscopy
Autore:
Muto, SE; Horiuchi, S; Tanabe, T;
Indirizzi:
Nagoya Univ, CIRSE, Chikusa Ku, Nagoya, Aichi 4648603, Japan Nagoya Univ Nagoya Aichi Japan 4648603 a Ku, Nagoya, Aichi 4648603, Japan NIRIM, Tsukuba, Ibaraki 3050044, Japan NIRIM Tsukuba Ibaraki Japan 3050044 IRIM, Tsukuba, Ibaraki 3050044, Japan
Titolo Testata:
JOURNAL OF ELECTRON MICROSCOPY
fascicolo: 6, volume: 48, anno: 1999,
pagine: 767 - 776
SICI:
0022-0744(1999)48:6<767:LSOIEG>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
DAMAGE PROCESS;
Keywords:
graphite; electron irradiation; high-resolution transmission electron microscopy; local structural order; auto-correlation analysis; image simulation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Muto, SE Nagoya Univ, CIRSE, Chikusa Ku, Nagoya, Aichi 4648603, Japan Nagoya Univ Nagoya Aichi Japan 4648603 oya, Aichi 4648603, Japan
Citazione:
S.E. Muto et al., "Local structural order in electron-irradiated graphite studied by high-resolution high-voltage electron microscopy", J ELEC MICR, 48(6), 1999, pp. 767-776

Abstract

Structural disordering in graphite under high-energy electron irradiation was directly observed by ultra high-resolution high-voltage electron microscopy (UHR-HVEM). The early stage of disordering could be characterized by the fragmentation into nano-crystallites and their cooperative rotation about the c-axis, maintaining the stacking correlation over several layers of the basal plane, where the average and scatter of the rotation angles increased with the irradiation time. Image processing revealed that the original honeycomb structure was maintained even in highly disordered regions apparently exhibiting random-like granular contrasts, but the local correlation extended no farther than 1.0 nm. Each fragmented and curled nanocrystallite contained dislocations, suggesting the formation of pentagonal and/or heptagonal atomic rings was also coordinated over a few layers.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 22:59:11