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Volumn 108, Issue 10, 2004, Pages 3114-3122

Adsorption and Charge-Transfer Study of Bi-isonicotinic Acid on In Situ-Grown Anatase TiO2 Nanoparticles

Author keywords

[No Author keywords available]

Indexed keywords

ADSORPTION; BISMUTH; CHARGE TRANSFER; ELECTRIC EXCITATION; NANOSTRUCTURED MATERIALS; ORGANOMETALLICS; PARTICLE BEAM INJECTION; RESONANCE; SPECTROSCOPY; TITANIUM OXIDES; VACUUM; X RAY ANALYSIS;

EID: 1842532310     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp0344491     Document Type: Article
Times cited : (35)

References (55)
  • 28
    • 1842526329 scopus 로고    scopus 로고
    • note
    • In photoemission spectroscopy, shake-up structures appear as features at higher binding energies (and, hence, lower kinetic energies) than the main peaks, typically with a separation of a few tenths of an electron volt to several or some tens of electron volts from the main peak. They are a result of multielectron processes in which electrons are excited from the occupied valence orbitals to the unoccupied ones, thereby reducing the kinetic energy of the outgoing (and measured) photoelectron (cf. panel c in Figure 5 in this paper). An analysis of their energies and intensities can provide useful information, in particular, about the electronic structure and the screening properties of the probed system (see, for example, refs 29-31).
  • 33
    • 1842421683 scopus 로고    scopus 로고
    • note
    • 38 Although the present knowledge is not sufficient for a quantitative evaluation of the substrate screening responses, it can be noted that the intramolecular charge-transfer character of the shakeup will lead to different responses for the shake-up final state and the main line, and that these, generally, are different for the different substrates. The explanation is also consistent with the XAS result that the Orbitals are quite similar for the two cases.
  • 39
    • 1842474168 scopus 로고    scopus 로고
    • note
    • C = 6 fs, which is the mean value of the numbers given previously.
  • 41
    • 1842526334 scopus 로고    scopus 로고
    • note
    • For an isolated excited state, the RPES signal disperses linearly on the binding energy scale, by virtue of energy conservation, if the experiment is conducted using narrow-band excitation, i.e., using a photon resolution below the lifetime broadening of the excited state (see, for example, ref 14). The experiment is said to be conducted under Auger resonant Raman (ARR) conditions. Even then, the overall dispersion across the entire spectral range is zero for two or more energetically well-separated excited (electronic) states (not coupled to any continuum), whereas it is linear within each resonance. Finally, for excited states with overlapping tails (commonly vibrational states), interference effects that destroy the linear dispersion might be present (see, for example, ref 42). In principle, the present experiment could be conducted using both narrow-band or broad-band excitation, and, in both cases, the overall zero dispersion can be used to distinguish RPES and RAES features, because several well-separated electronic resonances are part of the experiment's spectral range.
  • 43
    • 1842578843 scopus 로고    scopus 로고
    • note
    • A normalization using a gas-phase measurement truly representing the isolated molecule would be ideal but, however, is not easily conducted, because of the low vapor pressure of BINA.
  • 47
    • 1842421688 scopus 로고    scopus 로고
    • See, e.g., ref 50
    • See, e.g., ref 50.
  • 51
    • 1842421686 scopus 로고    scopus 로고
    • note
    • 40 The present curve has been extracted from these data.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.