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Volumn 60, Issue 4, 1999, Pages R2208-R2211

Energetics of the oxidation and opening of a carbon nanotube

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EID: 0001306821     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.60.R2208     Document Type: Article
Times cited : (81)

References (28)
  • 14
    • 85037913397 scopus 로고    scopus 로고
    • The SIESTA program is described in Ref. 16. It builds the DFT self-consistent Hamiltonian in order-(Formula presented) operations. The Hamiltonian problem can be solved either with diagonalization (order-(Formula presented) or with order-(Formula presented) algorithms according to convenience. In this study both options were used.
    • The SIESTA program is described in Ref. 16. It builds the DFT self-consistent Hamiltonian in order-(Formula presented) operations. The Hamiltonian problem can be solved either with diagonalization (order-(Formula presented) or with order-(Formula presented) algorithms according to convenience. In this study both options were used.
  • 22
    • 85037876823 scopus 로고    scopus 로고
    • The range of the orbitals is defined in a balanced way by a common orbital-confinement energy of 0.14 eV (Ref. 24). The resulting radii are 4.52 and 5.52 for the s and p orbitals of C, respectively, 5.20 for the s orbital of H, and 3.56 and 4.35 for s and p orbitals of O, all of them in atomic units.
    • The range of the orbitals is defined in a balanced way by a common orbital-confinement energy of 0.14 eV (Ref. 24). The resulting radii are 4.52 and 5.52 for the s and p orbitals of C, respectively, 5.20 for the s orbital of H, and 3.56 and 4.35 for s and p orbitals of O, all of them in atomic units.
  • 23
    • 85037902123 scopus 로고    scopus 로고
    • The split-off function reproduces the tail of the original orbital beyond some radius, matching to a smooth (Formula presented) towards the nucleus. The matching radius is chosen so that the split orbital carries 15% of the norm of the original one (Ref. 24
    • The split-off function reproduces the tail of the original orbital beyond some radius, matching to a smooth (Formula presented) towards the nucleus. The matching radius is chosen so that the split orbital carries 15% of the norm of the original one (Ref. 24).
  • 26
    • 85037909894 scopus 로고    scopus 로고
    • Note that the numbers in Fig. 22(a) depend on the proposed oxidation process, and that other possibilities, like involving C and O interstitials are plausible, and would affect the results. The origin of the ambiguity is the presence of three references (bulk C, (Formula presented), and (Formula presented) for defining the chemical potential of just two species, C and O. The process proposed involves no extra C atoms. However, the energy differences shown in Fig. 22(b) are independent of these assumptions. There is no ambiguity in the case of the closing process, since, in the absence of (Formula presented), both chemical potentials are well defined.
    • Note that the numbers in Fig. 22(a) depend on the proposed oxidation process, and that other possibilities, like involving C and O interstitials are plausible, and would affect the results. The origin of the ambiguity is the presence of three references (bulk C, (Formula presented), and (Formula presented) for defining the chemical potential of just two species, C and O. The process proposed involves no extra C atoms. However, the energy differences shown in Fig. 22(b) are independent of these assumptions. There is no ambiguity in the case of the closing process, since, in the absence of (Formula presented), both chemical potentials are well defined.
  • 27
    • 85037884572 scopus 로고    scopus 로고
    • At growth temperatures (Formula presented) K), molecular dynamics simulations have shown that narrow SWNT’s close spontaneously (Ref. 12
    • At growth temperatures (Formula presented) K), molecular dynamics simulations have shown that narrow SWNT’s close spontaneously (Ref. 12).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.