Scanning tunneling microscopy with chemically modified tips: Orientation-sensitive observation of ether oxygens

Tomoaki Nishino; Philippe Bühlmann; Takashi Ito; Yoshio Umezawa

doi:10.1016/S0039-6028(01)01345-0

Scanning tunneling microscopy with chemically modified tips: Orientation-sensitive observation of ether oxygens

Tomoaki Nishino, Philippe Bühlmann, Takashi Ito, Yoshio Umezawa

Chemistry (Twin Cities)

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

29 Scopus citations

Abstract

Diethers, CH₃(CH₂)₁₅O(CH₂)_n O(CH₂)₁₅CH₃ (n=10,11; C₁₆OC_nOC₁₆), adsorbed onto highly ordered pyrolytic graphite were observed with scanning tunneling microscopy (STM) using unmodified tips and tips chemically modified with 4-mercaptobenzoic acid (4MBA). Pairs of bright lines corresponding to the ether oxygens were observed with the modified but not the unmodified tips. Using the modified tips, one of the oxygens of C₁₆OC₁₀OC₁₆ appears brighter than the other one, whereas no difference in the brightness of the two oxygens of C₁₆OC₁₁OC₁₆ is observed in the STM images. The relative difference in the brightness for the ether oxygens appear to result from the facilitation of electron tunneling by hydrogen bond interactions between the ether oxygens of the samples and the carboxyl group of 4MBA on the tips. These results demonstrate that the STM observation using chemically modified tips can reveal the orientation of the ether oxygens and furthermore the molecular orientation of the sample molecules.

Original language	English (US)
Pages (from-to)	L579-L584
Journal	Surface Science
Volume	490
Issue number	1-2
DOIs	https://doi.org/10.1016/S0039-6028(01)01345-0
State	Published - Sep 1 2001

Bibliographical note

Funding Information:
This work was supported by Grants for Scientific Research from the Ministry of Education, Science and Culture, Japan, and the Nissan Science Foundation.

Keywords

Ethers
Physical adsorption
Scanning tunneling microscopy
Solid-liquid interfaces

Publisher link

10.1016/S0039-6028(01)01345-0

Find It

Find It at U of M Libraries

Cite this

@article{49fdc3cb28d94631aa1602faea39d16a,

title = "Scanning tunneling microscopy with chemically modified tips: Orientation-sensitive observation of ether oxygens",

abstract = "Diethers, CH3(CH2)15O(CH2)n O(CH2)15CH3 (n=10,11; C16OCnOC16), adsorbed onto highly ordered pyrolytic graphite were observed with scanning tunneling microscopy (STM) using unmodified tips and tips chemically modified with 4-mercaptobenzoic acid (4MBA). Pairs of bright lines corresponding to the ether oxygens were observed with the modified but not the unmodified tips. Using the modified tips, one of the oxygens of C16OC10OC16 appears brighter than the other one, whereas no difference in the brightness of the two oxygens of C16OC11OC16 is observed in the STM images. The relative difference in the brightness for the ether oxygens appear to result from the facilitation of electron tunneling by hydrogen bond interactions between the ether oxygens of the samples and the carboxyl group of 4MBA on the tips. These results demonstrate that the STM observation using chemically modified tips can reveal the orientation of the ether oxygens and furthermore the molecular orientation of the sample molecules.",

keywords = "Ethers, Physical adsorption, Scanning tunneling microscopy, Solid-liquid interfaces",

author = "Tomoaki Nishino and Philippe B{\"u}hlmann and Takashi Ito and Yoshio Umezawa",

note = "Funding Information: This work was supported by Grants for Scientific Research from the Ministry of Education, Science and Culture, Japan, and the Nissan Science Foundation.",

year = "2001",

month = sep,

day = "1",

doi = "10.1016/S0039-6028(01)01345-0",

language = "English (US)",

volume = "490",

pages = "L579--L584",

journal = "Surface Science",

issn = "0039-6028",

publisher = "Elsevier B.V.",

number = "1-2",

}

TY - JOUR

T1 - Scanning tunneling microscopy with chemically modified tips

T2 - Orientation-sensitive observation of ether oxygens

AU - Nishino, Tomoaki

AU - Bühlmann, Philippe

AU - Ito, Takashi

AU - Umezawa, Yoshio

N1 - Funding Information: This work was supported by Grants for Scientific Research from the Ministry of Education, Science and Culture, Japan, and the Nissan Science Foundation.

PY - 2001/9/1

Y1 - 2001/9/1

N2 - Diethers, CH3(CH2)15O(CH2)n O(CH2)15CH3 (n=10,11; C16OCnOC16), adsorbed onto highly ordered pyrolytic graphite were observed with scanning tunneling microscopy (STM) using unmodified tips and tips chemically modified with 4-mercaptobenzoic acid (4MBA). Pairs of bright lines corresponding to the ether oxygens were observed with the modified but not the unmodified tips. Using the modified tips, one of the oxygens of C16OC10OC16 appears brighter than the other one, whereas no difference in the brightness of the two oxygens of C16OC11OC16 is observed in the STM images. The relative difference in the brightness for the ether oxygens appear to result from the facilitation of electron tunneling by hydrogen bond interactions between the ether oxygens of the samples and the carboxyl group of 4MBA on the tips. These results demonstrate that the STM observation using chemically modified tips can reveal the orientation of the ether oxygens and furthermore the molecular orientation of the sample molecules.

AB - Diethers, CH3(CH2)15O(CH2)n O(CH2)15CH3 (n=10,11; C16OCnOC16), adsorbed onto highly ordered pyrolytic graphite were observed with scanning tunneling microscopy (STM) using unmodified tips and tips chemically modified with 4-mercaptobenzoic acid (4MBA). Pairs of bright lines corresponding to the ether oxygens were observed with the modified but not the unmodified tips. Using the modified tips, one of the oxygens of C16OC10OC16 appears brighter than the other one, whereas no difference in the brightness of the two oxygens of C16OC11OC16 is observed in the STM images. The relative difference in the brightness for the ether oxygens appear to result from the facilitation of electron tunneling by hydrogen bond interactions between the ether oxygens of the samples and the carboxyl group of 4MBA on the tips. These results demonstrate that the STM observation using chemically modified tips can reveal the orientation of the ether oxygens and furthermore the molecular orientation of the sample molecules.

KW - Ethers

KW - Physical adsorption

KW - Scanning tunneling microscopy

KW - Solid-liquid interfaces

UR - http://www.scopus.com/inward/record.url?scp=0035451588&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035451588&partnerID=8YFLogxK

U2 - 10.1016/S0039-6028(01)01345-0

DO - 10.1016/S0039-6028(01)01345-0

M3 - Article

AN - SCOPUS:0035451588

SN - 0039-6028

VL - 490

SP - L579-L584

JO - Surface Science

JF - Surface Science

IS - 1-2

ER -

Scanning tunneling microscopy with chemically modified tips: Orientation-sensitive observation of ether oxygens

Abstract

Bibliographical note

Keywords

Publisher link

Find It

Other files and links

Fingerprint

Cite this