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Volumn 66, Issue 12, 2002, Pages 1254011-1254015

Temperature-dependent work functions of free alkali-metal nanoparticles

Author keywords

[No Author keywords available]

Indexed keywords

ALKALI METAL; LITHIUM; POTASSIUM; SODIUM;

EID: 0013284366     PISSN: 01631829     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevB.66.125401     Document Type: Article
Times cited : (30)

References (42)
  • 2
    • 0003752338 scopus 로고
    • Cambridge University Press, Cambridge, England
    • A. Zangwill, Physics at Surfaces (Cambridge University Press, Cambridge, England, 1988).
    • (1988) Physics at Surfaces
    • Zangwill, A.1
  • 6
    • 0004188486 scopus 로고
    • edited by M. Cardona and L. Ley (Springer, Berlin)
    • M. Cardona and L. Ley, in Photoemission in Solids, edited by M. Cardona and L. Ley (Springer, Berlin, 1978).
    • (1978) Photoemission in Solids
    • Cardona, M.1    Ley, L.2
  • 12
    • 0003447168 scopus 로고
    • edited by H. Haberland (Springer, Berlin), and references therein
    • H. Burtscher and H. C. Siegmann, in Clusters of Atoms and Molecules, edited by H. Haberland (Springer, Berlin, 1994), Vol. II, and references therein.
    • (1994) Clusters of Atoms and Molecules , vol.2
    • Burtscher, H.1    Siegmann, H.C.2
  • 18
    • 84988766656 scopus 로고    scopus 로고
    • note
    • Pulsed laser ionization of large metal clusters generates a significant amount of fragmentation (Refs. 19 and 20). Accordingly, our measured TOF spectra are dominated by fragment peaks, as verified by varying the laser fluence: with decreasing laser pulse power the lower part of the size distribution was found to decrease, while the upper part remained unaffected apart from the overall decrease of the counting rate.
  • 24
    • 84988766849 scopus 로고    scopus 로고
    • note
    • As a manifestation of both particle size and absorption efficiency, a significant ion counting rate (ca. 1 kHz) could be observed upon illumination of the beam by a simple pocket flashlightnot a common occurrence in molecular beam studies.
  • 34
    • 84988754952 scopus 로고    scopus 로고
    • note
    • Our extrapolated zero-temperature work functions show a systematic shift on the order of 0.01 eV above the literature values. According to Eq. (3), a cluster with a radius of 5 nm should have an ionization potential ∼0.1 eV higher than the work function for a bulk surface. Note, however, that our beam contains a broad distribution of particle sizes, and therefore the yield threshold is dominated by the largest clusters in the distribution, as discussed in Sec. III. Particle sizes from the high end of the TOF mass spectrum bring the size correction term within the overall error bars (∼±0.05 eV) of the extrapolation.
  • 36
    • 84988766605 scopus 로고    scopus 로고
    • note
    • To be more precise, Ref. 8 calculates the work function as a quadratic, rather than linear, function of temperature. However, within the range and accuracy of our data a linear fit is adequate.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.