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Micro and Nanowrinkled Conductive Polymer Surfaces on Shape-memory Polymer Substrates: Tuning of Surface Microfeatures Towards Smart Biointerfaces.

Published online by Cambridge University Press:  06 March 2012

Francesco Greco ,
Toshinori Fujie ,
Silvia Taccola ,
Leonardo Ricotti ,
Arianna Menciassi  and
Virgilio Mattoli
Francesco Greco
Affiliation:
Center for MicroBioRobotics IIT@SSSA, Istituto Italiano di Tecnologia, Viale Rinaldo Piaggio 34, 56025 Pontedera, Italy
Toshinori Fujie
Affiliation:
Center for MicroBioRobotics IIT@SSSA, Istituto Italiano di Tecnologia, Viale Rinaldo Piaggio 34, 56025 Pontedera, Italy European Biomedical Science Institute (EBSI), Organization for European Studies, Waseda University, 2-2 Wakamtsu-cho, Shinjuku, Tokyo 162-8480, Japan
Silvia Taccola
Affiliation:
Center for MicroBioRobotics IIT@SSSA, Istituto Italiano di Tecnologia, Viale Rinaldo Piaggio 34, 56025 Pontedera, Italy Biorobotics Institute, Scuola Superiore Sant’Anna, Polo Sant’Anna Valdera, Viale Rinaldo Piaggio 34, 56025 Pontedera, Italy
Leonardo Ricotti
Affiliation:
Biorobotics Institute, Scuola Superiore Sant’Anna, Polo Sant’Anna Valdera, Viale Rinaldo Piaggio 34, 56025 Pontedera, Italy
Arianna Menciassi
Affiliation:
Center for MicroBioRobotics IIT@SSSA, Istituto Italiano di Tecnologia, Viale Rinaldo Piaggio 34, 56025 Pontedera, Italy Biorobotics Institute, Scuola Superiore Sant’Anna, Polo Sant’Anna Valdera, Viale Rinaldo Piaggio 34, 56025 Pontedera, Italy
Virgilio Mattoli
Affiliation:
Center for MicroBioRobotics IIT@SSSA, Istituto Italiano di Tecnologia, Viale Rinaldo Piaggio 34, 56025 Pontedera, Italy
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Abstract

With the aim of providing an easy and versatile method for realizing conductive polymer surfaces with controlled micro and nano-scale topographical cues patterning, we deposited a ultra-thin film of the conductive polymer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) on a thermo-retractable polystyrene sheet. Biaxial and uniaxial micro and nano-wrinkles were formed with different features depending on clamping geometry during shrinking of the substrate upon heating. Homogeneous nano and micro-patterning of surface topography over large areas (several cm2) was obtained. The formed wrinkles were very robust and adhered strongly to the substrate because of their penetration into the soft substrate during the heat-shrink process. In the case of uniaxial wrinkles a very well aligned quasi-periodic structure is formed with different populations of wavelengths ranging from submicrometric to 10-20 μm, depending on PEDOT:PSS thickness. Surface topography, wrinkles amplitude and wavelength have been evaluated by means of SEM and AFM and the results have been related to sheet resistance as measured with a four point probe technique. The realized conductive surfaces can offer new opportunities in the field of cell stimulation and growth.

Keywords

biomimetic (assembly)thin filmmicrostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1411: Symposium EE – Self Organization and Nanoscale Pattern Formation , 2012 , mrsf11-1411-ee09-21
Copyright
Copyright © Materials Research Society 2012

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References

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