Formation and optical characterisation of colloidal gold monolayers

Ernst S. Kooij; E.A.M. Brouwer; Herbert Wormeester; Bene Poelsema

doi:10.1016/S0927-7757(03)00239-5

Formation and optical characterisation of colloidal gold monolayers

Ernst S. Kooij, E.A.M. Brouwer, Herbert Wormeester, Bene Poelsema

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Abstract

We study the deposition of charge-stabilised gold nanocolloids on silicon substrates, which have been derivatised with (aminopropyl)triethoxysilane. Atomic force microscopy (AFM) and spectroscopic ellipsometry are employed to investigate the nanocrystal monolayers ex situ. Analysis of AFM images provides evidence that the formation of colloidal monolayers is governed by random sequential adsorption. The results indicate that the ionic strength of the suspension influences the spatial distribution of the colloids. In situ reflectometry also shows the effect of the (tunable) electrostatic interactions between the gold particles on the deposition kinetics. Especially in the saturation regime these interactions dominate the self-assembly.

Original language	Undefined
Pages (from-to)	103-111
Number of pages	9
Journal	Colloids and surfaces A: Physicochemical and engineering aspects
Volume	222
Issue number	1-3
DOIs	https://doi.org/10.1016/S0927-7757(03)00239-5
Publication status	Published - 2003

Keywords

Electrostatic interaction
Reflectometry
Ellipsometry
Nanocrystal monolayers
IR-74890
Gold colloids
METIS-214137

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10.1016/S0927-7757(03)00239-5

Cite this

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title = "Formation and optical characterisation of colloidal gold monolayers",

abstract = "We study the deposition of charge-stabilised gold nanocolloids on silicon substrates, which have been derivatised with (aminopropyl)triethoxysilane. Atomic force microscopy (AFM) and spectroscopic ellipsometry are employed to investigate the nanocrystal monolayers ex situ. Analysis of AFM images provides evidence that the formation of colloidal monolayers is governed by random sequential adsorption. The results indicate that the ionic strength of the suspension influences the spatial distribution of the colloids. In situ reflectometry also shows the effect of the (tunable) electrostatic interactions between the gold particles on the deposition kinetics. Especially in the saturation regime these interactions dominate the self-assembly.",

keywords = "Electrostatic interaction, Reflectometry, Ellipsometry, Nanocrystal monolayers, IR-74890, Gold colloids, METIS-214137",

author = "Kooij, {Ernst S.} and E.A.M. Brouwer and Herbert Wormeester and Bene Poelsema",

year = "2003",

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volume = "222",

pages = "103--111",

journal = "Colloids and surfaces A: Physicochemical and engineering aspects",

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TY - JOUR

T1 - Formation and optical characterisation of colloidal gold monolayers

AU - Kooij, Ernst S.

AU - Brouwer, E.A.M.

AU - Wormeester, Herbert

AU - Poelsema, Bene

PY - 2003

Y1 - 2003

N2 - We study the deposition of charge-stabilised gold nanocolloids on silicon substrates, which have been derivatised with (aminopropyl)triethoxysilane. Atomic force microscopy (AFM) and spectroscopic ellipsometry are employed to investigate the nanocrystal monolayers ex situ. Analysis of AFM images provides evidence that the formation of colloidal monolayers is governed by random sequential adsorption. The results indicate that the ionic strength of the suspension influences the spatial distribution of the colloids. In situ reflectometry also shows the effect of the (tunable) electrostatic interactions between the gold particles on the deposition kinetics. Especially in the saturation regime these interactions dominate the self-assembly.

AB - We study the deposition of charge-stabilised gold nanocolloids on silicon substrates, which have been derivatised with (aminopropyl)triethoxysilane. Atomic force microscopy (AFM) and spectroscopic ellipsometry are employed to investigate the nanocrystal monolayers ex situ. Analysis of AFM images provides evidence that the formation of colloidal monolayers is governed by random sequential adsorption. The results indicate that the ionic strength of the suspension influences the spatial distribution of the colloids. In situ reflectometry also shows the effect of the (tunable) electrostatic interactions between the gold particles on the deposition kinetics. Especially in the saturation regime these interactions dominate the self-assembly.

KW - Electrostatic interaction

KW - Reflectometry

KW - Ellipsometry

KW - Nanocrystal monolayers

KW - IR-74890

KW - Gold colloids

KW - METIS-214137

U2 - 10.1016/S0927-7757(03)00239-5

DO - 10.1016/S0927-7757(03)00239-5

M3 - Article

SN - 0927-7757

VL - 222

SP - 103

EP - 111

JO - Colloids and surfaces A: Physicochemical and engineering aspects

JF - Colloids and surfaces A: Physicochemical and engineering aspects

IS - 1-3

ER -