Self-assembled monolayer formation from decaneselenol on polycrystalline gold as characterized by electrochemical measurements, quartz-crystal microbalance, XPS, and IR spectroscopy

Koji Nakano, Takeshi Sato, Masato Tazaki, Makoto Takagi

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

Self-assembled monolayer (SAM) formation from decaneselenol on gold substrate surfaces was studied using electrochemical measurements, reflection-absorption Fourier transform infrared spectroscopy (FT-IRRAS), X-ray photoelectron spectroscopy (XPS), and quartz-crystal microbalance (QCM). The Au substrate modified with the SAMs showed clear IR absorption bands corresponding to the CH stretches while distinct photoemission peaks were observed at C 1s, Se 3d, and Se 3p core levels in its XPS spectrum. Using a quartz-crystal microbalance, the surface coverage by the SAM-forming molecule was determined to be 0.88 nmol cm-2. Electrochemical impedance measurements revealed frequency-dependent capacitive behavior of the SAM, and the equivalent parameter was determined to be 6.1×10-6 sφ Ω-1 cm-1 (φ = 0.94). It also showed that the surface coverage of 99.8% can be attained, resulting in the suppression of a heterogeneous electron-transfer rate constant for a redox species dissolved in solution phase. The dielectric constant for the monolayer film was calculated to be 5.0, which was closer to that of alkanethiols than that reported for diphenyl diselenide. Decaneselenol was concluded to adsorb on Au surfaces to form stable monolayers such as alkanethiols.

Original languageEnglish
Pages (from-to)2225-2229
Number of pages5
JournalLangmuir
Volume16
Issue number5
DOIs
Publication statusPublished - Mar 7 2000

Fingerprint

Quartz crystal microbalances
Self assembled monolayers
quartz crystals
Gold
microbalances
Infrared spectroscopy
X ray photoelectron spectroscopy
photoelectron spectroscopy
gold
spectroscopy
Monolayers
x rays
Core levels
impedance measurement
Photoemission
Substrates
Fourier transform infrared spectroscopy
Absorption spectra
Rate constants
electron transfer

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Self-assembled monolayer formation from decaneselenol on polycrystalline gold as characterized by electrochemical measurements, quartz-crystal microbalance, XPS, and IR spectroscopy. / Nakano, Koji; Sato, Takeshi; Tazaki, Masato; Takagi, Makoto.

In: Langmuir, Vol. 16, No. 5, 07.03.2000, p. 2225-2229.

Research output: Contribution to journalArticle

@article{8a937c8dcce74114800bee45798c4fc3,
title = "Self-assembled monolayer formation from decaneselenol on polycrystalline gold as characterized by electrochemical measurements, quartz-crystal microbalance, XPS, and IR spectroscopy",
abstract = "Self-assembled monolayer (SAM) formation from decaneselenol on gold substrate surfaces was studied using electrochemical measurements, reflection-absorption Fourier transform infrared spectroscopy (FT-IRRAS), X-ray photoelectron spectroscopy (XPS), and quartz-crystal microbalance (QCM). The Au substrate modified with the SAMs showed clear IR absorption bands corresponding to the CH stretches while distinct photoemission peaks were observed at C 1s, Se 3d, and Se 3p core levels in its XPS spectrum. Using a quartz-crystal microbalance, the surface coverage by the SAM-forming molecule was determined to be 0.88 nmol cm-2. Electrochemical impedance measurements revealed frequency-dependent capacitive behavior of the SAM, and the equivalent parameter was determined to be 6.1×10-6 sφ Ω-1 cm-1 (φ = 0.94). It also showed that the surface coverage of 99.8{\%} can be attained, resulting in the suppression of a heterogeneous electron-transfer rate constant for a redox species dissolved in solution phase. The dielectric constant for the monolayer film was calculated to be 5.0, which was closer to that of alkanethiols than that reported for diphenyl diselenide. Decaneselenol was concluded to adsorb on Au surfaces to form stable monolayers such as alkanethiols.",
author = "Koji Nakano and Takeshi Sato and Masato Tazaki and Makoto Takagi",
year = "2000",
month = "3",
day = "7",
doi = "10.1021/la990688x",
language = "English",
volume = "16",
pages = "2225--2229",
journal = "Langmuir",
issn = "0743-7463",
publisher = "American Chemical Society",
number = "5",

}

TY - JOUR

T1 - Self-assembled monolayer formation from decaneselenol on polycrystalline gold as characterized by electrochemical measurements, quartz-crystal microbalance, XPS, and IR spectroscopy

AU - Nakano, Koji

AU - Sato, Takeshi

AU - Tazaki, Masato

AU - Takagi, Makoto

PY - 2000/3/7

Y1 - 2000/3/7

N2 - Self-assembled monolayer (SAM) formation from decaneselenol on gold substrate surfaces was studied using electrochemical measurements, reflection-absorption Fourier transform infrared spectroscopy (FT-IRRAS), X-ray photoelectron spectroscopy (XPS), and quartz-crystal microbalance (QCM). The Au substrate modified with the SAMs showed clear IR absorption bands corresponding to the CH stretches while distinct photoemission peaks were observed at C 1s, Se 3d, and Se 3p core levels in its XPS spectrum. Using a quartz-crystal microbalance, the surface coverage by the SAM-forming molecule was determined to be 0.88 nmol cm-2. Electrochemical impedance measurements revealed frequency-dependent capacitive behavior of the SAM, and the equivalent parameter was determined to be 6.1×10-6 sφ Ω-1 cm-1 (φ = 0.94). It also showed that the surface coverage of 99.8% can be attained, resulting in the suppression of a heterogeneous electron-transfer rate constant for a redox species dissolved in solution phase. The dielectric constant for the monolayer film was calculated to be 5.0, which was closer to that of alkanethiols than that reported for diphenyl diselenide. Decaneselenol was concluded to adsorb on Au surfaces to form stable monolayers such as alkanethiols.

AB - Self-assembled monolayer (SAM) formation from decaneselenol on gold substrate surfaces was studied using electrochemical measurements, reflection-absorption Fourier transform infrared spectroscopy (FT-IRRAS), X-ray photoelectron spectroscopy (XPS), and quartz-crystal microbalance (QCM). The Au substrate modified with the SAMs showed clear IR absorption bands corresponding to the CH stretches while distinct photoemission peaks were observed at C 1s, Se 3d, and Se 3p core levels in its XPS spectrum. Using a quartz-crystal microbalance, the surface coverage by the SAM-forming molecule was determined to be 0.88 nmol cm-2. Electrochemical impedance measurements revealed frequency-dependent capacitive behavior of the SAM, and the equivalent parameter was determined to be 6.1×10-6 sφ Ω-1 cm-1 (φ = 0.94). It also showed that the surface coverage of 99.8% can be attained, resulting in the suppression of a heterogeneous electron-transfer rate constant for a redox species dissolved in solution phase. The dielectric constant for the monolayer film was calculated to be 5.0, which was closer to that of alkanethiols than that reported for diphenyl diselenide. Decaneselenol was concluded to adsorb on Au surfaces to form stable monolayers such as alkanethiols.

UR - http://www.scopus.com/inward/record.url?scp=0033871033&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033871033&partnerID=8YFLogxK

U2 - 10.1021/la990688x

DO - 10.1021/la990688x

M3 - Article

AN - SCOPUS:0033871033

VL - 16

SP - 2225

EP - 2229

JO - Langmuir

JF - Langmuir

SN - 0743-7463

IS - 5

ER -