Guiding the Dewetting of Thin Polymer Films by Colloidal Imprinting

Manuel Ghezzi, Peng Yuan Wang, Peter Kingshott, Chiara Neto

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Micropatterned surfaces are important in many biomedical and bioengineering applications, such as the development of biosensors. An approach for the creation of ordered surface patterns, fabricated combining colloidal crystals, consisting of ordered layers of micrometric particles, with dewetting of bilayers of thin polymer films is introduced. The produced patterns are both topographical and chemical in nature, consisting of ordered arrays of microscale holes imprinted in a polymer film, with tunable size. The spontaneous dewetting of the polymer film enables this tunability, with a maximum sevenfold increase in lateral size of the holes and sixfold increase in depth from imprinting to coalescence with neighboring holes. Polymer dewetting and layer inversion are seen to compete during the annealing of the polymer bilayers, and the optimal conditions for hole growth are identified. An in-depth investigation highlights the effects of UV-ozone treatment on the long-range ordering of the colloidal crystals and on preventing the dewetting of the imprinted bilayers. Ordered patterns of different size and depth are produced over large areas by tuning of the colloidal crystal assembly, UV surface treatment and dewetting conditions. Potential applications of the micropatterns produced in the present work include microarrays for single cell studies and biosensors.

Original languageEnglish
Article number1500068
JournalAdvanced Materials Interfaces
Volume2
Issue number11
DOIs
Publication statusPublished - Jul 1 2015
Externally publishedYes

Fingerprint

Polymer films
Biosensors
Thin films
Crystals
Inversion layers
Polymers
Microarrays
Coalescence
Ozone
Surface treatment
Tuning
Annealing

Keywords

  • colloidal crystals
  • polymer dewetting
  • polymeric materials
  • surface patterning
  • thin films

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Guiding the Dewetting of Thin Polymer Films by Colloidal Imprinting. / Ghezzi, Manuel; Wang, Peng Yuan; Kingshott, Peter; Neto, Chiara.

In: Advanced Materials Interfaces, Vol. 2, No. 11, 1500068, 01.07.2015.

Research output: Contribution to journalArticle

Ghezzi, Manuel ; Wang, Peng Yuan ; Kingshott, Peter ; Neto, Chiara. / Guiding the Dewetting of Thin Polymer Films by Colloidal Imprinting. In: Advanced Materials Interfaces. 2015 ; Vol. 2, No. 11.
@article{b72b42f9a92c493c8ccc9cac92b6742a,
title = "Guiding the Dewetting of Thin Polymer Films by Colloidal Imprinting",
abstract = "Micropatterned surfaces are important in many biomedical and bioengineering applications, such as the development of biosensors. An approach for the creation of ordered surface patterns, fabricated combining colloidal crystals, consisting of ordered layers of micrometric particles, with dewetting of bilayers of thin polymer films is introduced. The produced patterns are both topographical and chemical in nature, consisting of ordered arrays of microscale holes imprinted in a polymer film, with tunable size. The spontaneous dewetting of the polymer film enables this tunability, with a maximum sevenfold increase in lateral size of the holes and sixfold increase in depth from imprinting to coalescence with neighboring holes. Polymer dewetting and layer inversion are seen to compete during the annealing of the polymer bilayers, and the optimal conditions for hole growth are identified. An in-depth investigation highlights the effects of UV-ozone treatment on the long-range ordering of the colloidal crystals and on preventing the dewetting of the imprinted bilayers. Ordered patterns of different size and depth are produced over large areas by tuning of the colloidal crystal assembly, UV surface treatment and dewetting conditions. Potential applications of the micropatterns produced in the present work include microarrays for single cell studies and biosensors.",
keywords = "colloidal crystals, polymer dewetting, polymeric materials, surface patterning, thin films",
author = "Manuel Ghezzi and Wang, {Peng Yuan} and Peter Kingshott and Chiara Neto",
year = "2015",
month = "7",
day = "1",
doi = "10.1002/admi.201500068",
language = "English",
volume = "2",
journal = "Advanced Materials Interfaces",
issn = "2196-7350",
publisher = "John Wiley and Sons Ltd",
number = "11",

}

TY - JOUR

T1 - Guiding the Dewetting of Thin Polymer Films by Colloidal Imprinting

AU - Ghezzi, Manuel

AU - Wang, Peng Yuan

AU - Kingshott, Peter

AU - Neto, Chiara

PY - 2015/7/1

Y1 - 2015/7/1

N2 - Micropatterned surfaces are important in many biomedical and bioengineering applications, such as the development of biosensors. An approach for the creation of ordered surface patterns, fabricated combining colloidal crystals, consisting of ordered layers of micrometric particles, with dewetting of bilayers of thin polymer films is introduced. The produced patterns are both topographical and chemical in nature, consisting of ordered arrays of microscale holes imprinted in a polymer film, with tunable size. The spontaneous dewetting of the polymer film enables this tunability, with a maximum sevenfold increase in lateral size of the holes and sixfold increase in depth from imprinting to coalescence with neighboring holes. Polymer dewetting and layer inversion are seen to compete during the annealing of the polymer bilayers, and the optimal conditions for hole growth are identified. An in-depth investigation highlights the effects of UV-ozone treatment on the long-range ordering of the colloidal crystals and on preventing the dewetting of the imprinted bilayers. Ordered patterns of different size and depth are produced over large areas by tuning of the colloidal crystal assembly, UV surface treatment and dewetting conditions. Potential applications of the micropatterns produced in the present work include microarrays for single cell studies and biosensors.

AB - Micropatterned surfaces are important in many biomedical and bioengineering applications, such as the development of biosensors. An approach for the creation of ordered surface patterns, fabricated combining colloidal crystals, consisting of ordered layers of micrometric particles, with dewetting of bilayers of thin polymer films is introduced. The produced patterns are both topographical and chemical in nature, consisting of ordered arrays of microscale holes imprinted in a polymer film, with tunable size. The spontaneous dewetting of the polymer film enables this tunability, with a maximum sevenfold increase in lateral size of the holes and sixfold increase in depth from imprinting to coalescence with neighboring holes. Polymer dewetting and layer inversion are seen to compete during the annealing of the polymer bilayers, and the optimal conditions for hole growth are identified. An in-depth investigation highlights the effects of UV-ozone treatment on the long-range ordering of the colloidal crystals and on preventing the dewetting of the imprinted bilayers. Ordered patterns of different size and depth are produced over large areas by tuning of the colloidal crystal assembly, UV surface treatment and dewetting conditions. Potential applications of the micropatterns produced in the present work include microarrays for single cell studies and biosensors.

KW - colloidal crystals

KW - polymer dewetting

KW - polymeric materials

KW - surface patterning

KW - thin films

UR - http://www.scopus.com/inward/record.url?scp=84938614102&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84938614102&partnerID=8YFLogxK

U2 - 10.1002/admi.201500068

DO - 10.1002/admi.201500068

M3 - Article

AN - SCOPUS:84938614102

VL - 2

JO - Advanced Materials Interfaces

JF - Advanced Materials Interfaces

SN - 2196-7350

IS - 11

M1 - 1500068

ER -