Structures of Se chains encapsulated in single-walled carbon nanotubes

Hiroyuki Ikemoto*, Toshihiko Fujimori, Takafumi Miyanaga, Reo Kawaguchi, Koki Urita, Masao Tabuchi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

In this study, the structures of two Se chains confined inside single-walled carbon nanotubes (SWCNTs), which were denoted as Se@SWCNT, were investigated by extended X-ray absorption fine structure analysis and transmission electron microscopy. The Se chains were linear and parallel to each other in the SWCNTs. The covalent bond length of Se@SWCNT was shorter than that of trigonal Se (t-Se), whereas the force constant was larger, thereby suggesting that the covalent bond was stronger for Se@SWCNT than that for t-Se. The interchain interaction originated from the overlap of lone-pair and antibonding orbitals on adjacent chains, so the disappearance of the overlap in the encapsulated Se chains strengthened the covalent bonds.

Original languageEnglish
Article number111737
JournalJournal of Physics and Chemistry of Solids
Volume185
DOIs
StatePublished - 2024/02

Keywords

  • EXAFS
  • Selenium
  • Single-walled carbon nanotube

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics

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