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Volumn 122, Issue 5, 2000, Pages 988-989

Dynamic monolayer gradients: Active spatiotemporal control of alkanethiol coatings on thin gold films [20]

Author keywords

[No Author keywords available]

Indexed keywords

3 MERCAPTOPROPIONIC ACID; ALKANE; GOLD; THIOL;

EID: 0034624426     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja993442n     Document Type: Letter
Times cited : (112)

References (42)
  • 20
    • 12944336331 scopus 로고    scopus 로고
    • note
    • 0 + δ(x) + κΓ(x), where δ(x) represents a position-dependent stochastic fluctuation in the local resistivty, Γ(x) is the surface number density, and κ is a constant that depends on the chemical identity of the adsorbate. However, the stochastic and adsorption terms comprise typically an effect ≤ 5%, so they are neglected in this treatment.
  • 31
    • 12944320092 scopus 로고    scopus 로고
    • note
    • In these experiments, 3 mm × 75 mm Au films were deposited onto glass microscope slides and configured with four contacts sealed under epoxy to facilitate immersion of the narrow Au WE's.
  • 32
    • 12944320093 scopus 로고    scopus 로고
    • note
    • The spread of the surface energy gradient over nearly 400 mV in in-plane potential is most likely due to surface roughness of the Au films on glass, as anticipated by Porter and co-workers in ref 41.
  • 33
    • 12944299047 scopus 로고    scopus 로고
    • note
    • The small volume of the SPR flow-cell required the use of a Ag/ AgCl quasi-reference electrode prepared by contacting the working solution to a 0.5 M KOH/MeOH solution containing the Ag/AgCl electrode reference with a Au wire.
  • 34
    • 12944319597 scopus 로고    scopus 로고
    • note
    • +-pumped Ti-Sapphire laser. Imaging was performed with a 512 512 pixel CCD camera.
  • 39
    • 12944325567 scopus 로고    scopus 로고
    • note
    • The series of images in Figure 2 are numerically subtracted from an original exposure of the biased Au film to cancel a small (relative to the SAM) electroreflectance contribution. The reflection angle was set such that dark regions correspond to OT-covered Au and light regions to bare Au.
  • 40
    • 12944280011 scopus 로고    scopus 로고
    • note
    • The difference in half-widths of the desorption waves in Figures 1 and 2 can be attributed to differences in surface preparation. Figure 2 data were obtained on a carefully annealed evaporated Au film, producing Nernstian width waves with minimal separation. Figure 1 data were acquired on unannealed Au, because the magnitude of the gradient, i.e., Δ cos θ, is larger on unannealed Au than on annealed Au.
  • 42
    • 12944313803 scopus 로고    scopus 로고
    • note
    • -1. An in-plane potential gradient of this magnitude would necessitate an electrode length of the order of 10's of μm to avoid difficulties with solvent electrolysis and gas evolution.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.