book of abstracts - IM2NP

A B S T R A C T S WEDNESDAY, JUNE 30 N A N O S E A 2 0 1 0
The impact of the wideness and the height of the trenches on the block copolymer domains order were
investigated. The effect of the polymer chains length was also studied.
It was demonstrated that the order can be insured on length in the range of few hundreds of µm, illustrating
the potential of this technique for nanofabrication. From fundamental point of view, this work constitutes a
contribution to further understanding the phenomena leading to the self-assembly of block copolymers in
nanoconfined volumes. These surfaces were then use for the controlled deposition of nanoparticles for
applications in data storage, demonstrating the interest of this approach from a practical point of view.
12H20-12H40
Ultra Sensitive Piezoresistive All-Organic Flexible Thin-films and Strain
Sensors based on Nanostructured Polymeric Composite Materials.
J. Veciana,1,2E. Laukhina,2,1 R. Pfattner,1,2 L.R. Ferreras,1,2 V. Laukhin,3,,1,2.S.
Galli,4 M. Mas-Torrent,1,2 N. Masciocchi,4 V. C. Rovira,1,2 (1Institut de Ciencia de
Materials de Barcelona -CSIC, Campus UAB, Bellaterra, Spain; 2CIBER-BBN, Campus UAB, Bellaterra, Spain;
3Institució Catalana de Recerca i Estudis Avançats , Barcelona, Spain; 4Universitá dell‟Insubria, via Vallegio 11,
22100 Como, Italy.). vecianaj@icmab.es
The development of intelligent materials that can respond to the application of an external stimulus is of
major interest for the fabrication of artificial sensing devices able to sense and transmit information about the
physical, chemical and/or biological changes produced in our environment. In addition, if these materials can
be deposited or integrated on flexible and transparent substrates and processed employing low-cost bottomup”
techniques their appeal is greatly increased
Here, we show that by using bi-layer (BL) films, composed of a polymeric matrix with a top-layer formed by
a network of nano- or micro crystals of a conducting molecular charge-transfer salt, it is possible to translate
micron-scale elastic elongations of the film into reversible deformations of the soft organic charge-transfer
salt crystals at the nanoscale.1 These multiple length scale movements, from the micro to the nano scale, are
responsible of the ultra sensitive piezoresistive properties of the BL films that are extremely sensitive to
strain changes with durable, fast and completely reversible responses. Such BL films that show a sensitivity
one order of magnitude larger than the most commonly used electromechanical sensors have integrated in
textiles as well as in other surfaces exhibiting the same ultrasensitive piezoresistive sensitivity. In addition, a
few proof-of-concept experiments with simple prototypes for biomedical applications will be reported.
1 E. Laukhina et al., Adv. Mater. 2010, 24, in press. DOI: 10.1002/adma.200902639
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