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Volumn 72, Issue 14, 1998, Pages 1781-1783

Alkanethiol self-assembled monolayers as the dielectric of capacitors with nanoscale thickness

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[No Author keywords available]

Indexed keywords


EID: 0001065766     PISSN: 00036951     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.121183     Document Type: Article
Times cited : (275)

References (37)
  • 20
    • 21544441834 scopus 로고    scopus 로고
    • note
    • A microsyringe body (2.5 mm inner diameter) was used to maintain the area of the two facing Hg surfaces constant. A thiol solution was transferred to the syringe to form the first Hg-SAM interface. A calibrated drop of mercury (5 μL), previously stored in the thiol solution, was then rolled along the reclined syringe wall, bringing the second Hg-SAM surface gently into contact with the first one. Electrodes (50 μm diameter tungsten wire) were inserted into the drops. Solutions of thiols (1 mM) were prepared in ethanol, heptane, octane and hexadecane.
  • 21
    • 21544461317 scopus 로고    scopus 로고
    • note
    • All the electric measurements were performed in a shielded box with a micromanipulator probe station.
  • 22
    • 21544432515 scopus 로고    scopus 로고
    • note
    • Shorter chain thiols cause the Hg surfaces to merge.
  • 23
    • 21544482914 scopus 로고    scopus 로고
    • note
    • The capacitance was measured at 120, 400, 1000 Hz with a LEADER LCR-745 meter.
  • 24
    • 21544478916 scopus 로고    scopus 로고
    • note
    • solv is determining the value of the capacitance.
  • 26
    • 0003407246 scopus 로고
    • The permittivity of solvents at or near the surface is reduced as a consequence of the high molecular organization at the surface: Plenum New York
    • The permittivity of solvents at or near the surface is reduced as a consequence of the high molecular organization at the surface: J. O'M. Bockris and A. K. N. Reddy, Modern Electrochemistry (Plenum New York, 1977).
    • (1977) Modern Electrochemistry
    • Bockris, J.O'M.1    Reddy, A.K.N.2
  • 28
    • 21544483574 scopus 로고    scopus 로고
    • note
    • An Axopatch 1-D with a sensitivity of 0.1 pA from Axon Instruments Inc. was used for the measurements of leakage currents. Small voltages (from -150 to +150mV) were applied through the junction. Higher electric fields deform the mercury surfaces and damage the SAMs.
  • 29
    • 21544461594 scopus 로고    scopus 로고
    • note
    • Over a voltage range from +400 to -400mV, cyclic voltammetry does not show any redox reaction occurring at the Hg surfaces.
  • 30
    • 21544432779 scopus 로고    scopus 로고
    • note
    • When octane is used as solvent, stationary current values are reached instantaneously after applying the voltage. When alcohol is used as solvent, even after deoxygenation, the current reaches a constant value after a slow decay (Ixt=10-20pC). We attribute this small current to traces of impurities (traces of metal cations) present in the distilled ethanol.
  • 31
    • 9144258943 scopus 로고
    • In the limit of low electric field, electron tunneling theory predicts a linear I-V dependence, and allows for the determination of conductivity (σ=dI/dV); the conductivity is expected to decrease exponentially with the film thickness
    • In the limit of low electric field, electron tunneling theory predicts a linear I-V dependence, and allows for the determination of conductivity (σ=dI/dV); the conductivity is expected to decrease exponentially with the film thickness [J. G. Simmons, J. Appl. Phys. 34, 1793 (1963)].
    • (1963) J. Appl. Phys. , vol.34 , pp. 1793
    • Simmons, J.G.1
  • 32
    • 0015144078 scopus 로고
    • Since the minimum thickness of the SAM/SAM dielectric is 2.9 nm, the tunneling contribution to the total current is expected to be negligible
    • Since the minimum thickness of the SAM/SAM dielectric is 2.9 nm, the tunneling contribution to the total current is expected to be negligible [B. Mann and H. Khun, J. Appl. Phys. 42, 4398 (1971)].
    • (1971) J. Appl. Phys. , vol.42 , pp. 4398
    • Mann, B.1    Khun, H.2
  • 35
    • 21544476783 scopus 로고    scopus 로고
    • note
    • The measurements were performed with a electrochemical interface Solartron EI 1287 and a frequency response analyzer Solartron FRA 1256.
  • 36
    • 21544434703 scopus 로고    scopus 로고
    • note
    • 2=25.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.