Electrochemical stability of self-assembled monolayers on gold

Langmuir

Volumn 14, Issue 26, 1998, Pages 7463-7467

  Beulen, Marcel W J ^a   Kastenberg, Miryam I ^a   Van Veggel, Frank C J M ^a   Reinhoudt, David N ^a  

^a UNIVERSITY OF TWENTE   (Netherlands)

Author keywords

[No Author keywords available]

Indexed keywords

CHARGE TRANSFER; ELECTROCHEMISTRY; GOLD; SUBSTITUTION REACTIONS; SULFUR COMPOUNDS;

ALKYL SULFIDES; ELECTROCHEMICAL STABILITY; SELF-ASSEMBLED MONOLAYERS; THIOLS;

MONOLAYERS;

EID: 0032293216     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la981031z     Document Type: Article

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34. 9a Only electrochemistry is apparently sensitive enough to detect differences.
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36. It is well-known that monolayers can be deliberately desorbed in the presence of a base or acid in one voltammetric scan at reductive or oxidative potentials; see, for example: (a) Walczak, M. M.; Popenoe, D. D.; Deinhammer, R. S.; Lamp, B. D.; Chung, C.; Porter, M. D. Langmuir 1991, 7, 2687-2693. (b) Widrig, C. A.; Chung, C.; Porter, M. D. J. Electroanal. Chem. 1991, 310, 335-359. (c) Weisshaar, D. E.; Lamp, B. D.; Porter, M. D. J. Am. Chem. Soc. 1992, 114, 5860-5862.
37. It is well-known that monolayers can be deliberately desorbed in the presence of a base or acid in one voltammetric scan at reductive or oxidative potentials; see, for example: (a) Walczak, M. M.; Popenoe, D. D.; Deinhammer, R. S.; Lamp, B. D.; Chung, C.; Porter, M. D. Langmuir 1991, 7, 2687-2693. (b) Widrig, C. A.; Chung, C.; Porter, M. D. J. Electroanal. Chem. 1991, 310, 335-359. (c) Weisshaar, D. E.; Lamp, B. D.; Porter, M. D. J. Am. Chem. Soc. 1992, 114, 5860-5862.
38. MSE in the heterogeneous electron-transfer measurements has a capacitive and a faradaic component. For curve a, this current (0.18 μA) consists of>80% capacitance current and <20% heterogeneous electron-transfer current of the ferro/ferri redox couple in solution. For curve b, the current (30.0 μA) consists of <2% capacitance current and >98% faradaic current.
39. The stability of the self-assembled monolayers can also be monitored by heterogeneous electron transfer, leading to the same stability windows.
40. MSE (anodic scan).
41. Sondag-Huethorst, J. A. M.; Fokkink, L. G. J. Langmuir 1992, 8, 2560-2566.