UV-ozone patterning of micro-nano fibrillated cellulose (MNFC) with alkylsilane self-assembled monolayers

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UV-ozone patterning of micro-nano fibrillated cellulose (MNFC) with alkylsilane self-assembled monolayers. / Kämäräinen, Tero; Arcot, Lokanathan R.; Johansson, Leena-Sisko; Campbell, Joseph; Tammelin, Tekla; Franssila, Sami; Laine, Janne; Rojas, Orlando J.

In: Cellulose, Vol. 23, No. 3, 2016, p. 1847-1857.

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@article{e798263b74dd4e39ac6732824b715a84,
title = "UV-ozone patterning of micro-nano fibrillated cellulose (MNFC) with alkylsilane self-assembled monolayers",
abstract = "We report on a facile photolithography-based procedure for surface energy patterning of novel micro-nano fibrillated cellulose (MNFC) films and demonstrate spatial control of protein adsorption. The kinetics of oxidative degradation of chemisorbed hydrophobic alkylsilane monolayers on MNFC upon exposure to UV/ozone and the effect on the adsorption of bovine serum albumin (BSA) as a function of pH were studied using surface sensitive techniques. Wetting properties, surface morphology and surface chemical composition of the MNFC films were investigated by using water contact angle goniometry, atomic force microscopy and X-ray photoelectron spectroscopy, respectively. Optical microscopy was used to give a spatial-specific visualization of adsorbed dye-tagged BSA. UV/ozone exposure turned the initially hydrophobic alkylsilane covered MNFC substrate into a hydrophilic surface. As a result, significant changes in local wetting characteristics were observed leading to a quantitative change in BSA adsorption. Moreover, by using a UV mask, it was possible to create a hydrophobic-hydrophilic pattern on the MNFC film, and thus spatially-resolved adsorption of protein patterns were achieved. These results extend the understanding and further the applicability of MNFC films towards microfluidic-based (bio)diagnostics.",
keywords = "Nanocellulose (MNFC), Photolithography, Protein patterning, Self-assembled monolayer (SAM), Silane",
author = "Tero K{\"a}m{\"a}r{\"a}inen and Arcot, {Lokanathan R.} and Leena-Sisko Johansson and Joseph Campbell and Tekla Tammelin and Sami Franssila and Janne Laine and Rojas, {Orlando J.}",
year = "2016",
doi = "10.1007/s10570-016-0942-x",
language = "English",
volume = "23",
pages = "1847--1857",
journal = "Cellulose",
issn = "0969-0239",
number = "3",

}

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TY - JOUR

T1 - UV-ozone patterning of micro-nano fibrillated cellulose (MNFC) with alkylsilane self-assembled monolayers

AU - Kämäräinen, Tero

AU - Arcot, Lokanathan R.

AU - Johansson, Leena-Sisko

AU - Campbell, Joseph

AU - Tammelin, Tekla

AU - Franssila, Sami

AU - Laine, Janne

AU - Rojas, Orlando J.

PY - 2016

Y1 - 2016

N2 - We report on a facile photolithography-based procedure for surface energy patterning of novel micro-nano fibrillated cellulose (MNFC) films and demonstrate spatial control of protein adsorption. The kinetics of oxidative degradation of chemisorbed hydrophobic alkylsilane monolayers on MNFC upon exposure to UV/ozone and the effect on the adsorption of bovine serum albumin (BSA) as a function of pH were studied using surface sensitive techniques. Wetting properties, surface morphology and surface chemical composition of the MNFC films were investigated by using water contact angle goniometry, atomic force microscopy and X-ray photoelectron spectroscopy, respectively. Optical microscopy was used to give a spatial-specific visualization of adsorbed dye-tagged BSA. UV/ozone exposure turned the initially hydrophobic alkylsilane covered MNFC substrate into a hydrophilic surface. As a result, significant changes in local wetting characteristics were observed leading to a quantitative change in BSA adsorption. Moreover, by using a UV mask, it was possible to create a hydrophobic-hydrophilic pattern on the MNFC film, and thus spatially-resolved adsorption of protein patterns were achieved. These results extend the understanding and further the applicability of MNFC films towards microfluidic-based (bio)diagnostics.

AB - We report on a facile photolithography-based procedure for surface energy patterning of novel micro-nano fibrillated cellulose (MNFC) films and demonstrate spatial control of protein adsorption. The kinetics of oxidative degradation of chemisorbed hydrophobic alkylsilane monolayers on MNFC upon exposure to UV/ozone and the effect on the adsorption of bovine serum albumin (BSA) as a function of pH were studied using surface sensitive techniques. Wetting properties, surface morphology and surface chemical composition of the MNFC films were investigated by using water contact angle goniometry, atomic force microscopy and X-ray photoelectron spectroscopy, respectively. Optical microscopy was used to give a spatial-specific visualization of adsorbed dye-tagged BSA. UV/ozone exposure turned the initially hydrophobic alkylsilane covered MNFC substrate into a hydrophilic surface. As a result, significant changes in local wetting characteristics were observed leading to a quantitative change in BSA adsorption. Moreover, by using a UV mask, it was possible to create a hydrophobic-hydrophilic pattern on the MNFC film, and thus spatially-resolved adsorption of protein patterns were achieved. These results extend the understanding and further the applicability of MNFC films towards microfluidic-based (bio)diagnostics.

KW - Nanocellulose (MNFC)

KW - Photolithography

KW - Protein patterning

KW - Self-assembled monolayer (SAM)

KW - Silane

UR - http://www.scopus.com/inward/record.url?scp=84963786021&partnerID=8YFLogxK

U2 - 10.1007/s10570-016-0942-x

DO - 10.1007/s10570-016-0942-x

M3 - Article

VL - 23

SP - 1847

EP - 1857

JO - Cellulose

JF - Cellulose

SN - 0969-0239

IS - 3

ER -

ID: 3052644