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Volumn 104, Issue 35, 2000, Pages 8507-8511

Scanning tunneling microscopy study of AIanes/Al(lll): Contrasting neat and molecularly-terminated W tips

Author keywords

[No Author keywords available]

Indexed keywords

CHEMICAL MODIFICATION; CRYSTALS; ELECTRIC CONDUCTIVITY OF SOLIDS; FERMI LEVEL; MOLECULES; MORPHOLOGY; OLIGOMERS; SCANNING TUNNELING MICROSCOPY; STRUCTURE (COMPOSITION); SURFACE TOPOGRAPHY; TUNNEL JUNCTIONS; VACUUM APPLICATIONS;

EID: 0034274868     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp001212l     Document Type: Article
Times cited : (6)

References (33)
  • 24
    • 33645918476 scopus 로고    scopus 로고
    • note
    • We estimate the absolute tip-sample separation by considering the turning point of helium atoms scattering off of a metal surface. To the 4 A turning point (Ellis, J.; Hermann, K.; Hofmann, F.; Toennies, J. P. Phys. Rev. Lett. 1995, 75, 886), we add 1 A (to account for the size difference between He and tip (W) atoms) and 2 A (to move the tip from repulsive contact with the surface to a region of weaker attraction.) Under close scanning conditions (Ω = 0.7 MΩ), we thus estimate the tip-sample separation to be ∼6 Å.
  • 25
    • 33645948459 scopus 로고    scopus 로고
    • note
    • 1.025φ(cV)W is the tip-sample separation and φ is the work function, as per Introduction to Scanning Tunneling Microscopy by C. Julian Chen (Oxford University Press: New York, 1993). We experimentally set the gap resistance R and estimate the corresponding separation IV with φ = 4.7 eV (the average work function for Al and W) and the reference value W ∼ 6 A at Q = 0.7 MQ.
  • 26
    • 0001456432 scopus 로고
    • While the geometries of chemisorbed alanes have not been determined precisely, a height of 2.8 a is consistent with the calculated geometries of free alanes reported
    • Duke, B. J.; Liang, C.; Schaeffer, H. F., III.
    • While the geometries of chemisorbed alanes have not been determined precisely, a height of 2.8 A is consistent with the calculated geometries of free alanes reported in: Duke, B. J.; Liang, C.; Schaeffer, H. F., III. J. Am. Chem. Soc. 1991, 113, 2884.
    • (1991) J. Am. Chem. Soc. , vol.113 , pp. 2884
  • 33
    • 33645928455 scopus 로고    scopus 로고
    • Calculations were carried out in GAUSSIAN95 using the 6-316 OVGF basis set
    • Calculations were carried out in GAUSSIAN95 using the 6-316 OVGF basis set.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.