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Volumn 107, Issue 26, 2003, Pages 6360-6376

Molecule-metal polarization at rectifying GaAs interfaces

Author keywords

[No Author keywords available]

Indexed keywords

CURRENT VOLTAGE CHARACTERISTICS; MONOLAYERS; SEMICONDUCTING FILMS; SEMICONDUCTOR JUNCTIONS;

EID: 0038441896     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp026779b     Document Type: Article
Times cited : (81)

References (101)
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    • Langmuir-Blodgett films
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    • Richardson, T. Langmuir-Blodgett films. In An Introduction to Molecular Electronics, 1st ed.; Petty, M. C., Bryce, M. R., Bloor, D., Eds.; Edward Arnold: London, 1995; Chapter 10, p 220.
    • (1995) An Introduction to Molecular Electronics, 1st Ed. , pp. 220
    • Richardson, T.1
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    • Selzer, Y.; Salomon, A.; Cahen, D. J. Am. Chem. Soc. 2002, 124, 2886. J. Phys. Chem. B 2002, 106, 10432.
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  • 17
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    • Resonant tunneling and molecular rectification in Langmuir-Blodgett films
    • Jortner, J., Ratner, M., Eds.; Blackwell Science: Oxford, U.K.
    • Roth, S.; Burghard, M.; Fischer, C. M. Resonant tunneling and molecular rectification in Langmuir-Blodgett films. In Molecular electronics; Jortner, J., Ratner, M., Eds.; Blackwell Science: Oxford, U.K., 1997; p 255.
    • (1997) Molecular Electronics , pp. 255
    • Roth, S.1    Burghard, M.2    Fischer, C.M.3
  • 23
    • 0038164081 scopus 로고    scopus 로고
    • note
    • We use the term molecular layer (MoL) instead of monolayer (ML), to stress the difference between these layers, on the one hand, and nearperfectly ordered monolayers with both local and long-range order, on the other hand. In our case, there is average order, perpendicular to the binding surface, because we use ligands with a well-defined binding site. We followed adsorption procedures to avoid multilayers on the surface. Total coverage can vary from 0.75 to 1 monolayer, depending on the binding groups, substituents, and substrate.
  • 57
    • 0037488775 scopus 로고    scopus 로고
    • note
    • 2O to the acetonitrile solution will precipitate the nonsubstituted (H) dC ligands as a thick layer on the surface.
  • 68
    • 85087594747 scopus 로고    scopus 로고
    • note
    • -30 C·m, which is the MKS unit for the dipole moment.
  • 69
    • 0037488774 scopus 로고    scopus 로고
    • note
    • XPS confirmed the presence and the stoichiometry of the adsorbed molecules with their substituent elements (e.g., N, F) at their outside, on top of an oxide layer composed of Ga and As in lower (than III) oxidation state. The thickness extracted based on different elements varies slightly and was 10 ± 4 Å for both the MoL and the oxide, in agreement with our ellipsometry data (cf. supplementary information).
  • 71
    • 0038502688 scopus 로고    scopus 로고
    • note
    • Supply and other technical problems prevented us from collecting the complete series of data, including the OMe derivative, for vacuum evaporation without Ar.
  • 80
    • 0038164076 scopus 로고    scopus 로고
    • note
    • Estimates of the contact area, independent of the barrier height can be gotten by measuring the I-V characteristics as a function of temperature, or use of additional methods such as capacitance-voltage and internal photoemission measurements. We have experimented with both temperature-dependent I-V and capacitance-voltage measurements and find their interpretation to be even less straightforward than that of the current-voltage ones. Thus, though definitely worthwhile, they will require a major further effort to bear fruit.
  • 89
    • 0037826324 scopus 로고    scopus 로고
    • note
    • The slope values were extracted by us from the experimental data of Myburg et al.
  • 90
    • 0038164065 scopus 로고    scopus 로고
    • note
    • This procedure was found to give cleaner and smoother surfaces under nonclean room conditions.
  • 91
    • 0037488766 scopus 로고    scopus 로고
    • note
    • We take the energy difference between the neutral molecule and the radical anion, formed by adding an electron to it, as the electron affinity of a molecule, in calculations relaxation effects are neglected and the calculations are for the geometry of the neutral species; cf. also Vondrak et al.
  • 94
    • 85087596393 scopus 로고    scopus 로고
    • note
    • 94).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.