Adsorption behavior of binary mixed alkanethiol molecules on Au: Scanning tunneling microscope and linear-scan voltammetry investigation

Yong Kwan Kim; Jae Pil Koo; Chul Joon Huh; Jeong Sook Ha; Ung Hwan Pi; Sung Yool Choi; Jun Ho Kim

doi:10.1016/j.apsusc.2005.07.059

Adsorption behavior of binary mixed alkanethiol molecules on Au: Scanning tunneling microscope and linear-scan voltammetry investigation

Yong Kwan Kim, Jae Pil Koo, Chul Joon Huh, Jeong Sook Ha, Ung Hwan Pi, Sung Yool Choi, Jun Ho Kim

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

Adsorption behavior of binary mixed alkanethiol molecules of octanethiol (OT) and dodecanethiol (DDT) on Au substrate has been investigated with a variation of molar fraction in solution at room temperature. Linear-scan voltammograms (LSV) taken from the binary mixed self-assembled monolayer (SAM) on Au/Si showed a single reductive desorption peak, continuously shifting with a variation of mixing ratio in solution. Molecule-resolved scanning tunneling microscope (STM) images obtained from the binary SAM on Au/mica showed the phase separation with a few nanometer sized domains. The difference in the chain length between OT and DDT was not large enough to induce the phase separation with much larger domains, which could be well detected by LSV. There was no preferential adsorption of DDT to OT.

Original language	English
Pages (from-to)	4951-4956
Number of pages	6
Journal	Applied Surface Science
Volume	252
Issue number	14
DOIs	https://doi.org/10.1016/j.apsusc.2005.07.059
Publication status	Published - 2006 May 15

Bibliographical note

Funding Information:
This work was supported by National R&D Project for Nano Science and Technology (Grant No. M1-023-12-003-04-M03-12-003-00).

Keywords

Adsorption behavior
Binary self-assembled monolayer
Linear-scan voltammetry
Phase separation
Scanning tunneling microscope

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces, Coatings and Films
Surfaces and Interfaces

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10.1016/j.apsusc.2005.07.059

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title = "Adsorption behavior of binary mixed alkanethiol molecules on Au: Scanning tunneling microscope and linear-scan voltammetry investigation",

abstract = "Adsorption behavior of binary mixed alkanethiol molecules of octanethiol (OT) and dodecanethiol (DDT) on Au substrate has been investigated with a variation of molar fraction in solution at room temperature. Linear-scan voltammograms (LSV) taken from the binary mixed self-assembled monolayer (SAM) on Au/Si showed a single reductive desorption peak, continuously shifting with a variation of mixing ratio in solution. Molecule-resolved scanning tunneling microscope (STM) images obtained from the binary SAM on Au/mica showed the phase separation with a few nanometer sized domains. The difference in the chain length between OT and DDT was not large enough to induce the phase separation with much larger domains, which could be well detected by LSV. There was no preferential adsorption of DDT to OT.",

keywords = "Adsorption behavior, Binary self-assembled monolayer, Linear-scan voltammetry, Phase separation, Scanning tunneling microscope",

author = "Kim, {Yong Kwan} and Koo, {Jae Pil} and Huh, {Chul Joon} and Ha, {Jeong Sook} and Pi, {Ung Hwan} and Choi, {Sung Yool} and Kim, {Jun Ho}",

note = "Funding Information: This work was supported by National R&D Project for Nano Science and Technology (Grant No. M1-023-12-003-04-M03-12-003-00).",

year = "2006",

month = may,

day = "15",

doi = "10.1016/j.apsusc.2005.07.059",

language = "English",

volume = "252",

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journal = "Applied Surface Science",

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T2 - Scanning tunneling microscope and linear-scan voltammetry investigation

AU - Kim, Yong Kwan

AU - Koo, Jae Pil

AU - Huh, Chul Joon

AU - Ha, Jeong Sook

AU - Pi, Ung Hwan

AU - Choi, Sung Yool

AU - Kim, Jun Ho

N1 - Funding Information: This work was supported by National R&D Project for Nano Science and Technology (Grant No. M1-023-12-003-04-M03-12-003-00).

PY - 2006/5/15

Y1 - 2006/5/15

N2 - Adsorption behavior of binary mixed alkanethiol molecules of octanethiol (OT) and dodecanethiol (DDT) on Au substrate has been investigated with a variation of molar fraction in solution at room temperature. Linear-scan voltammograms (LSV) taken from the binary mixed self-assembled monolayer (SAM) on Au/Si showed a single reductive desorption peak, continuously shifting with a variation of mixing ratio in solution. Molecule-resolved scanning tunneling microscope (STM) images obtained from the binary SAM on Au/mica showed the phase separation with a few nanometer sized domains. The difference in the chain length between OT and DDT was not large enough to induce the phase separation with much larger domains, which could be well detected by LSV. There was no preferential adsorption of DDT to OT.

AB - Adsorption behavior of binary mixed alkanethiol molecules of octanethiol (OT) and dodecanethiol (DDT) on Au substrate has been investigated with a variation of molar fraction in solution at room temperature. Linear-scan voltammograms (LSV) taken from the binary mixed self-assembled monolayer (SAM) on Au/Si showed a single reductive desorption peak, continuously shifting with a variation of mixing ratio in solution. Molecule-resolved scanning tunneling microscope (STM) images obtained from the binary SAM on Au/mica showed the phase separation with a few nanometer sized domains. The difference in the chain length between OT and DDT was not large enough to induce the phase separation with much larger domains, which could be well detected by LSV. There was no preferential adsorption of DDT to OT.

KW - Adsorption behavior

KW - Binary self-assembled monolayer

KW - Linear-scan voltammetry

KW - Phase separation

KW - Scanning tunneling microscope

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DO - 10.1016/j.apsusc.2005.07.059

M3 - Article

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SN - 0169-4332

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SP - 4951

EP - 4956

JO - Applied Surface Science

JF - Applied Surface Science

IS - 14

ER -

Adsorption behavior of binary mixed alkanethiol molecules on Au: Scanning tunneling microscope and linear-scan voltammetry investigation

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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