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Cellulose Films: Designing Template-Free Nanoporous Cellulose Films on Semiconducting Surfaces

Published online by Cambridge University Press:  20 June 2014

Ana P. Carapeto ,
Ana Maria Ferraria ,
Pedro Brogueira ,
Sami Boufi  and
Ana Maria B. Do Rego
Ana P. Carapeto
Affiliation:
Centro de Química-Física Molecular and IN, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
Ana Maria Ferraria*
Affiliation:
Centro de Química-Física Molecular and IN, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
Pedro Brogueira
Affiliation:
ICEMS, Department of Physics, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
Sami Boufi
Affiliation:
Laboratoire des Sciences des Matériaux et Environnement, University of Sfax, Route Soukra km 3.5, BP 11713000 Sfax, Tunisia
Ana Maria B. Do Rego
Affiliation:
Centro de Química-Física Molecular and IN, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
*
*Corresponding author.[email protected]
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Abstract

In this work, we report the preparation of ultrathin submicro- and nanoporous cellulose films onto Si (100). The effect of different experimental conditions of preparation on the film surface morphology was studied, namely the role of the film casting method (spin- versus dip-coating), solvent (toluene or tetrahydrofuran), substrate pretreatment (hydrophilicity degree), and regeneration procedure with HCl vapors (two consecutive dips followed by regeneration or regeneration after each dip). The surface morphological structures presented in this work were never obtained before without the use of templates. A rather regular two-dimensional pore network was obtained onto the less hydrophilic Si substrate (contact angle≅68°), after two consecutive dips (with an intercalary rotation of 180º) in trimethylsilyl cellulose diluted in toluene and regeneration at the end. All the surfaces were characterized by atomic force microscopy.

Keywords

cellulosenanostructured filmsporous filmsAFMsilicon waferdip-coating
Type
SPMicros Special Section
Information
Microscopy and Microanalysis , Volume 21 , Issue 1 , February 2015 , pp. 102 - 107
Copyright
© Microscopy Society of America 2014 

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