Real-time observation of coil-to-globule transition in thermosensitive poly(N-isopropylacrylamide) brushes by quartz crystal microbalance

Masahiko Annaka; Chie Yahiro; Kenichi Nagase; Akihiko Kikuchi; Teruo Okano

doi:10.1016/j.polymer.2007.06.067

Real-time observation of coil-to-globule transition in thermosensitive poly(N-isopropylacrylamide) brushes by quartz crystal microbalance

Masahiko Annaka, Chie Yahiro, Kenichi Nagase, Akihiko Kikuchi, Teruo Okano

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

57 Citations (Scopus)

Abstract

Thermosensitive poly(N-isopropylacrylamide) (PNIPAm) brushes grafted on SiO₂-coated quartz crystal surface were prepared by the surface initiated radical polymerization. Using X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM), about 50 nm thickness of PNIPAm brushes were successfully formed. Quartz crystal microbalance with dissipation (QCM-D) is employed to investigate the collapse and swelling behavior of the PNIPAm brushes in water in real time. Both frequency and dissipation of PNIPAm layer were found to change gradually over the temperature range 15-50 °C, indicating that the brushes undergo a continuous transition. This continuous change is attributed to the nonuniformity and stretching of PNIPAm brushes as well as the cooperativity between collapse and dehydration transition.

Original language	English
Pages (from-to)	5713-5720
Number of pages	8
Journal	Polymer
Volume	48
Issue number	19
DOIs	https://doi.org/10.1016/j.polymer.2007.06.067
Publication status	Published - 2007 Sept 10
Externally published	Yes

Keywords

Coil-to-globule transition
Poly(N-isopropylacrylamide)
Polymer brush

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1016/j.polymer.2007.06.067

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title = "Real-time observation of coil-to-globule transition in thermosensitive poly(N-isopropylacrylamide) brushes by quartz crystal microbalance",

abstract = "Thermosensitive poly(N-isopropylacrylamide) (PNIPAm) brushes grafted on SiO2-coated quartz crystal surface were prepared by the surface initiated radical polymerization. Using X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM), about 50 nm thickness of PNIPAm brushes were successfully formed. Quartz crystal microbalance with dissipation (QCM-D) is employed to investigate the collapse and swelling behavior of the PNIPAm brushes in water in real time. Both frequency and dissipation of PNIPAm layer were found to change gradually over the temperature range 15-50 °C, indicating that the brushes undergo a continuous transition. This continuous change is attributed to the nonuniformity and stretching of PNIPAm brushes as well as the cooperativity between collapse and dehydration transition.",

keywords = "Coil-to-globule transition, Poly(N-isopropylacrylamide), Polymer brush",

author = "Masahiko Annaka and Chie Yahiro and Kenichi Nagase and Akihiko Kikuchi and Teruo Okano",

note = "Funding Information: The work was partly supported by the R&D project for Environmental Nanotechnology of the Ministry of the Environment (MOE), Japanese government. MA acknowledges the Tokuyama Science Foundation for financial support. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.",

year = "2007",

month = sep,

day = "10",

doi = "10.1016/j.polymer.2007.06.067",

language = "English",

volume = "48",

pages = "5713--5720",

journal = "Polymer",

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T1 - Real-time observation of coil-to-globule transition in thermosensitive poly(N-isopropylacrylamide) brushes by quartz crystal microbalance

AU - Annaka, Masahiko

AU - Yahiro, Chie

AU - Nagase, Kenichi

AU - Kikuchi, Akihiko

AU - Okano, Teruo

N1 - Funding Information: The work was partly supported by the R&D project for Environmental Nanotechnology of the Ministry of the Environment (MOE), Japanese government. MA acknowledges the Tokuyama Science Foundation for financial support. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.

PY - 2007/9/10

Y1 - 2007/9/10

N2 - Thermosensitive poly(N-isopropylacrylamide) (PNIPAm) brushes grafted on SiO2-coated quartz crystal surface were prepared by the surface initiated radical polymerization. Using X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM), about 50 nm thickness of PNIPAm brushes were successfully formed. Quartz crystal microbalance with dissipation (QCM-D) is employed to investigate the collapse and swelling behavior of the PNIPAm brushes in water in real time. Both frequency and dissipation of PNIPAm layer were found to change gradually over the temperature range 15-50 °C, indicating that the brushes undergo a continuous transition. This continuous change is attributed to the nonuniformity and stretching of PNIPAm brushes as well as the cooperativity between collapse and dehydration transition.

AB - Thermosensitive poly(N-isopropylacrylamide) (PNIPAm) brushes grafted on SiO2-coated quartz crystal surface were prepared by the surface initiated radical polymerization. Using X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM), about 50 nm thickness of PNIPAm brushes were successfully formed. Quartz crystal microbalance with dissipation (QCM-D) is employed to investigate the collapse and swelling behavior of the PNIPAm brushes in water in real time. Both frequency and dissipation of PNIPAm layer were found to change gradually over the temperature range 15-50 °C, indicating that the brushes undergo a continuous transition. This continuous change is attributed to the nonuniformity and stretching of PNIPAm brushes as well as the cooperativity between collapse and dehydration transition.

KW - Coil-to-globule transition

KW - Poly(N-isopropylacrylamide)

KW - Polymer brush

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JO - Polymer

JF - Polymer

IS - 19

ER -

Real-time observation of coil-to-globule transition in thermosensitive poly(N-isopropylacrylamide) brushes by quartz crystal microbalance

Abstract

Keywords

ASJC Scopus subject areas

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