On the quantitative adsorption behavior of multi-zwitterionic end-functionalized polymers onto gold surfaces

Mi Kyoung Park, Giorgos Sakellariou, Stergios Pispas, Nikos Hadjichristidis, Rigoberto Advincula

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We investigate the adsorption behavior of polystyrene (PS) chains end-functionalized with one, two, and three zwitterionic groups onto gold surfaces using the quartz crystal microbalance (QCM) method. The grafting density of the adsorbed chains was found to have a scaling behavior with respect to molecular weight and number of functional zwitterionic arms. The addition of more sulfobetaine zwitterionic end-group increases the adsorption onto the gold surface, resulting in higher grafting density and closer interchain spacing between the brushes. However, when the polymer brushes became too dense (the conformation ratio, γ < 0.4) the kinetic process becomes the limiting process, due to the strong repulsion between the existing polymer brushes, in which case the number of zwitterionic groups becomes the more dominant component. The experimental data of interchain spacing, s, was found to be directly related to the scaling relationship (Ns/Δ)3/5, in which Ns is the degree of polymerization of PS and ΔkBT is the sticking energy, which follows the theoretical prediction as previously reported. The advantages of using the current model polymers and method include: neutrality and small size of the sulfobetaine anchoring group, fast time scale kinetics, and direct quantitative behavior by which adsorption phenomenon is observed in situ using the QCM.

Original languageEnglish
Pages (from-to)115-121
Number of pages7
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume326
Issue number3
DOIs
Publication statusPublished - 2008 Sep 1
Externally publishedYes

Fingerprint

Brushes
Gold
Polymers
brushes
Quartz crystal microbalances
Polystyrenes
gold
Adsorption
adsorption
polymers
quartz crystals
microbalances
polystyrene
Kinetics
spacing
scaling
Conformations
kinetics
Molecular weight
Polymerization

Keywords

  • Adsorption
  • Polybutadiene
  • Polystyrene
  • QCM
  • Scaling parameter
  • SPR
  • Zwitterionic

ASJC Scopus subject areas

  • Colloid and Surface Chemistry

Cite this

On the quantitative adsorption behavior of multi-zwitterionic end-functionalized polymers onto gold surfaces. / Park, Mi Kyoung; Sakellariou, Giorgos; Pispas, Stergios; Hadjichristidis, Nikos; Advincula, Rigoberto.

In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 326, No. 3, 01.09.2008, p. 115-121.

Research output: Contribution to journalArticle

Park, Mi Kyoung ; Sakellariou, Giorgos ; Pispas, Stergios ; Hadjichristidis, Nikos ; Advincula, Rigoberto. / On the quantitative adsorption behavior of multi-zwitterionic end-functionalized polymers onto gold surfaces. In: Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2008 ; Vol. 326, No. 3. pp. 115-121.
@article{a81906b85e5f4d359c42263822da05de,
title = "On the quantitative adsorption behavior of multi-zwitterionic end-functionalized polymers onto gold surfaces",
abstract = "We investigate the adsorption behavior of polystyrene (PS) chains end-functionalized with one, two, and three zwitterionic groups onto gold surfaces using the quartz crystal microbalance (QCM) method. The grafting density of the adsorbed chains was found to have a scaling behavior with respect to molecular weight and number of functional zwitterionic arms. The addition of more sulfobetaine zwitterionic end-group increases the adsorption onto the gold surface, resulting in higher grafting density and closer interchain spacing between the brushes. However, when the polymer brushes became too dense (the conformation ratio, γ < 0.4) the kinetic process becomes the limiting process, due to the strong repulsion between the existing polymer brushes, in which case the number of zwitterionic groups becomes the more dominant component. The experimental data of interchain spacing, s, was found to be directly related to the scaling relationship (Ns/Δ)3/5, in which Ns is the degree of polymerization of PS and ΔkBT is the sticking energy, which follows the theoretical prediction as previously reported. The advantages of using the current model polymers and method include: neutrality and small size of the sulfobetaine anchoring group, fast time scale kinetics, and direct quantitative behavior by which adsorption phenomenon is observed in situ using the QCM.",
keywords = "Adsorption, Polybutadiene, Polystyrene, QCM, Scaling parameter, SPR, Zwitterionic",
author = "Park, {Mi Kyoung} and Giorgos Sakellariou and Stergios Pispas and Nikos Hadjichristidis and Rigoberto Advincula",
year = "2008",
month = "9",
day = "1",
doi = "10.1016/j.colsurfa.2008.05.034",
language = "English",
volume = "326",
pages = "115--121",
journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",
issn = "0927-7757",
publisher = "Elsevier",
number = "3",

}

TY - JOUR

T1 - On the quantitative adsorption behavior of multi-zwitterionic end-functionalized polymers onto gold surfaces

AU - Park, Mi Kyoung

AU - Sakellariou, Giorgos

AU - Pispas, Stergios

AU - Hadjichristidis, Nikos

AU - Advincula, Rigoberto

PY - 2008/9/1

Y1 - 2008/9/1

N2 - We investigate the adsorption behavior of polystyrene (PS) chains end-functionalized with one, two, and three zwitterionic groups onto gold surfaces using the quartz crystal microbalance (QCM) method. The grafting density of the adsorbed chains was found to have a scaling behavior with respect to molecular weight and number of functional zwitterionic arms. The addition of more sulfobetaine zwitterionic end-group increases the adsorption onto the gold surface, resulting in higher grafting density and closer interchain spacing between the brushes. However, when the polymer brushes became too dense (the conformation ratio, γ < 0.4) the kinetic process becomes the limiting process, due to the strong repulsion between the existing polymer brushes, in which case the number of zwitterionic groups becomes the more dominant component. The experimental data of interchain spacing, s, was found to be directly related to the scaling relationship (Ns/Δ)3/5, in which Ns is the degree of polymerization of PS and ΔkBT is the sticking energy, which follows the theoretical prediction as previously reported. The advantages of using the current model polymers and method include: neutrality and small size of the sulfobetaine anchoring group, fast time scale kinetics, and direct quantitative behavior by which adsorption phenomenon is observed in situ using the QCM.

AB - We investigate the adsorption behavior of polystyrene (PS) chains end-functionalized with one, two, and three zwitterionic groups onto gold surfaces using the quartz crystal microbalance (QCM) method. The grafting density of the adsorbed chains was found to have a scaling behavior with respect to molecular weight and number of functional zwitterionic arms. The addition of more sulfobetaine zwitterionic end-group increases the adsorption onto the gold surface, resulting in higher grafting density and closer interchain spacing between the brushes. However, when the polymer brushes became too dense (the conformation ratio, γ < 0.4) the kinetic process becomes the limiting process, due to the strong repulsion between the existing polymer brushes, in which case the number of zwitterionic groups becomes the more dominant component. The experimental data of interchain spacing, s, was found to be directly related to the scaling relationship (Ns/Δ)3/5, in which Ns is the degree of polymerization of PS and ΔkBT is the sticking energy, which follows the theoretical prediction as previously reported. The advantages of using the current model polymers and method include: neutrality and small size of the sulfobetaine anchoring group, fast time scale kinetics, and direct quantitative behavior by which adsorption phenomenon is observed in situ using the QCM.

KW - Adsorption

KW - Polybutadiene

KW - Polystyrene

KW - QCM

KW - Scaling parameter

KW - SPR

KW - Zwitterionic

UR - http://www.scopus.com/inward/record.url?scp=48749098080&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=48749098080&partnerID=8YFLogxK

U2 - 10.1016/j.colsurfa.2008.05.034

DO - 10.1016/j.colsurfa.2008.05.034

M3 - Article

AN - SCOPUS:48749098080

VL - 326

SP - 115

EP - 121

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

SN - 0927-7757

IS - 3

ER -