Piero Cosseddu, professeur à la CNR - Institute of Nanoscience et au Département du génie électrique et électronique à l'Université de Cagliari en Italie, présentera une conférence le vendredi 1er décembre 2017 à 11 h, à la salle Tudor-Johnston du Centre Énergie Matériaux Télécommunications de l'INRS à Varennes.
Piero Cosseddu est l'invité du professeur Emanuele Orgiu. La conférence du professeur Cosseddu s'intitule « Organic Charged Modulated FETs: a flexible technology for sensing applications ».
Organic Electronics, has attracted considerable attention over the past few decades as it offers the opportunity to produce electronic systems with multiple functionalities, over large areas, at low cost and possibly on flexible substrates. Amongst these devices, organic thin film transistors (OTFTs) are recognized as key tools/building blocks for the implementation of electronic logic circuits.
The aim of this talk is, at first, to demonstrate that there exist reproducible techniques for fabricating low voltage OTFTs on highly flexible and conformable plastic substrates making them suitable for a wide range of applications ranging from wearable electronics to robotics. Moreover, it will be shown that they also represent a very interesting and versatile tool for the realization of sensing platforms. A wide review of OTFT based sensors will be given, focusing in particular on the employment of a novel architecture, called Organic Charge Modulated Field Effect Transistor (OCMFET). Charge Modulated OTFTs represent a versatile tool for the realization of a wide range of sensing applications. The architecture is based on a floating gate organic transistor whose sensitivity to a specific target is obtained by properly functionalizing a part of the floating gate with a sensing layer that can be chosen according to the specific external stimulus to be sensed.
We will see that such an architecture can be successfully used for the fabrication of many different kinds of sensors, from bio-chemical sensing devices such as pH sensors to DNA hybridization sensors, but also for monitoring both the electrical and metabolic activity of excitable cells, thus giving rise to a new family of highly sensitive, reference-less, and low-cost devices for a wide range of bio-sensing applications. Moreover, we will also demonstrate that using a different sensing layer it is possible to employ the same device architecture for the realization of matrices of multimodal tactile transducers capable to detect at the same time temperature and pressure stimuli, and that being fabricated on sub-micrometer thin film can be conformably transferred on whatever kind of surface allowing the reproduction of the sense of touch.
Bienvenue à tous!