Theoretical studies on force titration of amino-group-terminated self-assembled monolayers

Junmei Wang, Hua Zhang, Huixin He, Tingjun Hou, Zhongfan Liu, Xiaojie Xu

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The structures of (3-aminopropyl)triethoxysilane (APTES), 4-aminothiophenol (4-ATP) and 4-mercaptopyridine (4-MP) self-assembled monolayers (SAMs) are studied by quantum mechanics in order to explain the force titration curves of these amino-group-terminated SAMs. The surface charges and electrostatic surface potentials derived from the ab initio calculations can give satisfactory explanations for the experimental results. We also propose a simple model to simulate the force titration process. The force between the tip and sample can be estimated according to the slope coefficient of the curve of energy versus distance. This curve can lead to a better understanding of the force titration curves of amino-group-terminated SAMs.

Original languageEnglish (US)
Pages (from-to)295-303
Number of pages9
JournalJournal of Molecular Structure: THEOCHEM
Volume451
Issue number3
DOIs
StatePublished - Oct 5 1998
Externally publishedYes

Fingerprint

Self assembled monolayers
Mechanics
Static Electricity
Titration
titration
Theoretical Models
curves
Quantum theory
Surface charge
Electrostatics
quantum mechanics
electrostatics
slopes
4-thiopyridine
amino-propyl-triethoxysilane
4-aminothiophenol
coefficients
energy

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

Wang, Junmei ; Zhang, Hua ; He, Huixin ; Hou, Tingjun ; Liu, Zhongfan ; Xu, Xiaojie. / Theoretical studies on force titration of amino-group-terminated self-assembled monolayers. In: Journal of Molecular Structure: THEOCHEM. 1998 ; Vol. 451, No. 3. pp. 295-303.
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Theoretical studies on force titration of amino-group-terminated self-assembled monolayers. / Wang, Junmei; Zhang, Hua; He, Huixin; Hou, Tingjun; Liu, Zhongfan; Xu, Xiaojie.

In: Journal of Molecular Structure: THEOCHEM, Vol. 451, No. 3, 05.10.1998, p. 295-303.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Theoretical studies on force titration of amino-group-terminated self-assembled monolayers

AU - Wang, Junmei

AU - Zhang, Hua

AU - He, Huixin

AU - Hou, Tingjun

AU - Liu, Zhongfan

AU - Xu, Xiaojie

PY - 1998/10/5

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AB - The structures of (3-aminopropyl)triethoxysilane (APTES), 4-aminothiophenol (4-ATP) and 4-mercaptopyridine (4-MP) self-assembled monolayers (SAMs) are studied by quantum mechanics in order to explain the force titration curves of these amino-group-terminated SAMs. The surface charges and electrostatic surface potentials derived from the ab initio calculations can give satisfactory explanations for the experimental results. We also propose a simple model to simulate the force titration process. The force between the tip and sample can be estimated according to the slope coefficient of the curve of energy versus distance. This curve can lead to a better understanding of the force titration curves of amino-group-terminated SAMs.

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