Small size limit to self-assembled monolayer formation on gold(111)

Joyanta K. Saha; Yoonho Ahn; Hyojeong Kim; George C. Schatz; Joonkyung Jang

doi:10.1021/jp202564m

Small size limit to self-assembled monolayer formation on gold(111)

Joyanta K. Saha, Yoonho Ahn, Hyojeong Kim, George C. Schatz, Joonkyung Jang

Northwestern University

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

15 Citations (Scopus)

Abstract

Using molecular dynamics simulations, we show that the minimum diameter of ordered self-assembled monolayer (SAM) structures of alkanethiols on Au(111) is 1.9 nm at room temperature. This presumably sets the ultimate resolution of the SAM patterns created by nanolithography. For SAMs larger than 1.9 nm, the tilt direction of the alkyl chain precesses around the center of the SAM. This precession changes direction on a time scale that increases from picoseconds to nanoseconds as the SAM size varies from 2 to 3 nm.

Original language	English
Pages (from-to)	13193-13199
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	115
Issue number	27
DOIs	https://doi.org/10.1021/jp202564m
Publication status	Published - Jul 14 2011

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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AU - Saha, Joyanta K.

AU - Ahn, Yoonho

AU - Kim, Hyojeong

AU - Schatz, George C.

AU - Jang, Joonkyung

PY - 2011/7/14

Y1 - 2011/7/14

N2 - Using molecular dynamics simulations, we show that the minimum diameter of ordered self-assembled monolayer (SAM) structures of alkanethiols on Au(111) is 1.9 nm at room temperature. This presumably sets the ultimate resolution of the SAM patterns created by nanolithography. For SAMs larger than 1.9 nm, the tilt direction of the alkyl chain precesses around the center of the SAM. This precession changes direction on a time scale that increases from picoseconds to nanoseconds as the SAM size varies from 2 to 3 nm.

AB - Using molecular dynamics simulations, we show that the minimum diameter of ordered self-assembled monolayer (SAM) structures of alkanethiols on Au(111) is 1.9 nm at room temperature. This presumably sets the ultimate resolution of the SAM patterns created by nanolithography. For SAMs larger than 1.9 nm, the tilt direction of the alkyl chain precesses around the center of the SAM. This precession changes direction on a time scale that increases from picoseconds to nanoseconds as the SAM size varies from 2 to 3 nm.

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SN - 1932-7447

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Small size limit to self-assembled monolayer formation on gold(111)

Abstract

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