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Volumn 300, Issue 5624, 2003, Pages 1416-1419

Real-time monitoring of growing nanoparticles

Author keywords

[No Author keywords available]

Indexed keywords

CATALYSTS; INTERFACES (MATERIALS); PARTICLE SIZE ANALYSIS; ULTRAHIGH VACUUM; X RAY SCATTERING;

EID: 0037849902     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1082146     Document Type: Article
Times cited : (341)

References (29)
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    • Hansen, P.L.1
  • 5
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    • A. Zunger, Ed.
    • Semiconductor Quantum Dots, A. Zunger, Ed. Mater. Res. Soc. Bull. 23 (no. 2) (1998).
    • (1998) Mater. Res. Soc. Bull. , vol.23 , Issue.2
  • 11
    • 0037844532 scopus 로고    scopus 로고
    • note
    • Materials and methods are available as supporting material on Science Online.
  • 14
    • 0037506953 scopus 로고    scopus 로고
    • note
    • We determined the island-size distribution and the pair correlation function by analyzing several transmission electron microscope (TEM) images. In all cases, the lateral size distribution was well fitted by a tog-normat function, the usual one encountered in this kind of growth regime. S(q) (Fig. 3B) was computed from the pair correlation function and fitted with an appropriate function that had two parameters to describe the inter-island separation D and the height and width of the first peak.
  • 15
    • 0038520951 scopus 로고    scopus 로고
    • note
    • A marked result was the very narrow distribution of particle height with respect to that of lateral size, which is evidenced by the second and third orders of scattering perpendicular to the surface (Figs. 2 and 3A) and confirmed by quantitative analyses. This behavior, which seemed to be independent of the deposited metal [Pd, Ag, or Pt on MgO(001)], temperature, and film thickness, is believed to originate from growth mechanisms. First, the denser (111) faces grow faster than the (001) facets. Second, although the (111) side facets grow from both the vapor phase and atom diffusion, the (001) top facets grow mostly from the vapor phase, as if they were isolated, because of the high-energy barrier an atom has to overcome to jump from a (111) to a (001) facet.
  • 16
    • 0038520950 scopus 로고    scopus 로고
    • note
    • For all samples, the thickness measured with the quartz microbalance was recalibrated ex situ on the final deposit by Rutherford backscattering spectroscopy and by x-ray microprobe.
  • 17
    • 0037844534 scopus 로고    scopus 로고
    • note
    • The small differences between experimental (Fig. 3A) and simulated (Fig. 3D) images could have arisen from a small amount of already coalesced particles. However, the first islands to coalesce were the smallest, which contributed only negligibly to the GISAXS pattern because the intensity was proportional to the volume squared of the particles.
  • 19
    • 0037844533 scopus 로고
    • thesis, Arbeitstagung Festköper Physik Dresden
    • R. Kaishew, thesis, Arbeitstagung Festköper Physik Dresden (1952), p. 81.
    • (1952) , pp. 81
    • Kaishew, R.1
  • 22
    • 0004700688 scopus 로고    scopus 로고
    • G. Haas et al., Phys. Rev. B 61, 11105 (2000).
    • (2000) Phys. Rev. B , vol.61 , pp. 11105
    • Haas, G.1
  • 29
    • 0037844531 scopus 로고    scopus 로고
    • note
    • We thank all the staff of the ESRF ID32 beamline for their invaluable help during the mounting of the GISAXS setup and the measurements.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.