Poly(ethylene glycol) self-assembled monolayer island growth

Jonas Rundqvist; Jan H. Hoh; David B. Haviland

doi:10.1021/la0471792

Poly(ethylene glycol) self-assembled monolayer island growth

Jonas Rundqvist, Jan H. Hoh, David B. Haviland

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

38 Scopus citations

Abstract

Here, we report a study of the morphology and growth dynamics of a self-assembled monolayer (SAM) of the amide containing polyethylene glycol) (PEG) thiol (CH ₃O(CH ₂CH ₂O) ₁₇NHCO(CH ₂) ₂SH) on atomically flat Au(111) surfaces. SAM growth from a 20 μM ethanolic solution reveals island growth through three distinct steps: island nucleation, island growth, and coalescence. The coalescence-step, filling voids in the SAM, is by far slowest. The fine structure study reveals dendritic island formation, an observation which can be explained by attractive intermolecular interactions and surface diffusion-limited aggregation. We have also observed a change in the island height, which peaks during the island growth phase. This height change can be associated with a molecular conformational transition.

Original language	English (US)
Pages (from-to)	2981-2987
Number of pages	7
Journal	Langmuir
Volume	21
Issue number	7
DOIs	https://doi.org/10.1021/la0471792
State	Published - Mar 29 2005
Externally published	Yes

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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10.1021/la0471792

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abstract = "Here, we report a study of the morphology and growth dynamics of a self-assembled monolayer (SAM) of the amide containing polyethylene glycol) (PEG) thiol (CH 3O(CH 2CH 2O) 17NHCO(CH 2) 2SH) on atomically flat Au(111) surfaces. SAM growth from a 20 μM ethanolic solution reveals island growth through three distinct steps: island nucleation, island growth, and coalescence. The coalescence-step, filling voids in the SAM, is by far slowest. The fine structure study reveals dendritic island formation, an observation which can be explained by attractive intermolecular interactions and surface diffusion-limited aggregation. We have also observed a change in the island height, which peaks during the island growth phase. This height change can be associated with a molecular conformational transition.",

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AU - Rundqvist, Jonas

AU - Hoh, Jan H.

AU - Haviland, David B.

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N2 - Here, we report a study of the morphology and growth dynamics of a self-assembled monolayer (SAM) of the amide containing polyethylene glycol) (PEG) thiol (CH 3O(CH 2CH 2O) 17NHCO(CH 2) 2SH) on atomically flat Au(111) surfaces. SAM growth from a 20 μM ethanolic solution reveals island growth through three distinct steps: island nucleation, island growth, and coalescence. The coalescence-step, filling voids in the SAM, is by far slowest. The fine structure study reveals dendritic island formation, an observation which can be explained by attractive intermolecular interactions and surface diffusion-limited aggregation. We have also observed a change in the island height, which peaks during the island growth phase. This height change can be associated with a molecular conformational transition.

AB - Here, we report a study of the morphology and growth dynamics of a self-assembled monolayer (SAM) of the amide containing polyethylene glycol) (PEG) thiol (CH 3O(CH 2CH 2O) 17NHCO(CH 2) 2SH) on atomically flat Au(111) surfaces. SAM growth from a 20 μM ethanolic solution reveals island growth through three distinct steps: island nucleation, island growth, and coalescence. The coalescence-step, filling voids in the SAM, is by far slowest. The fine structure study reveals dendritic island formation, an observation which can be explained by attractive intermolecular interactions and surface diffusion-limited aggregation. We have also observed a change in the island height, which peaks during the island growth phase. This height change can be associated with a molecular conformational transition.

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Poly(ethylene glycol) self-assembled monolayer island growth

Abstract

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