Sandro Carrara | EPFL Graph Search

Sandro Carrara a été nommé IEEE Fellow pour ses remarquables réalisations dans le domaine de la conception de biocapteurs CMOS à l'échelle nanométrique. Il a également reçu le prix "IEEE Sensors Council Technical Achievement Award" en 2016 pour son leadership dans le domaine émergent du co-design des interfaces Bio/Nano/CMOS. Il est un Professeur titulaire à l' EPFL à Lausanne (Suisse) et responsable du groupe de recherche "Bio/CMOS Interfaces" (BCI). Il est ancien professeur de biocapteurs optiques et électriques au Département de génie électrique et de biophysique (DIBE) de l'Université de Gênes (Italie) et ancien professeur de nanotechnologie à l'Université de Bologne (Italie). Il est titulaire d'un doctorat en biochimie et de biophysique de l'Université de Padoue (Italie), une master en physique de l'Université de Gênes (Italie), et un diplôme en électronique de l'Institut National de Technologie à Albenga (Italie). Ses intérêts scientifiques sont sur les phénomènes électriques de films nano-bio-structuré, et comprennent CMOS conception de biopuces à base de protéines et de l'ADN. Le long de sa carrière, il a publié 7 livres, l'un comme auteur avec Springer sur les interfaces Bio/CMOS et, plus récemment, un manuel de bioélectronique avec La prestigieuse Cambridge University Press. Il a également publié plus de 250 articles scientifiques et est l'auteur de 13 brevets. Il est maintenant chef rédacteur du Journal IEEE Sensors; il est également fondateur et chef rédacteur du Journal BioNanoScience par Springer, et rédacteur adjoint de IEEE Transactions on Circuits and Biomedical Systems. Il est membre du IEEE Sensors Council et de son comité exécutif. Il était membre du Conseil des gouverneurs de la IEEE Circuits And Systems Society (CASS). Il a été nommé IEEE conférencier émérite pour les années 2017-2019 pour le Conseil IEEE Sensors, et de la société CASS pour les années 2013-2014. Son travail a reçu plusieurs reconnaissances internationales: plusieurs Top-25 Hottest-articles (2004, 2005, 2008, 2009, et deux fois en 2012) publiés dans des journaux internationales très fort impact telles que Biosensors and Bioelectronics, Sensors And Actuators B, IEEE Sensors, et Thin Solid Films; un Award à une conference de l'OTAN en 1996 pour la contribution originale à la physique de la conductivité à électron unique dans les nano-particules; six "Best Paper Awards" pour des articles présentés à la conférence IEEE Sensors Conference en 2019 (Montreal), IEEE NGCAS en 2017 (Genoa), MOBIHEALTH en 2016 (Milan), IEEE PRIME en 2015 (Glasgow), en 2010 (Berlin) et en 2009 (Cork), un prix de la meilleure affiche au rencontre annuel de Nanotera en 2011 (Berne), et un prix de la meilleure affiche au NanoEurope Symposium en 2009 (Rapperswil). De 1997 à 2000, il a été membre d'un comité international au ELETTRA Synchrotron à Trieste. De 2000 à 2003, il était responsable scientifique d'un Programme national de recherche (PNR) dans le dépôt de nanobiotechnologie. Il était un expert internationalement estimé du comité d'évaluation de l'Académie de Finlande dans un programme de recherche pour les années 2010-2013. Il a été le président général (General Chair) de la Conférence IEEE BioCAS 2014, le premier conférence internationale dans le domaine des circuits et des systèmes pour les applications biomédicales.

A Front-End CMOS Interface Circuit With High Voltage Charge Pump and Oscillator for Capacitive Micromachined Ultrasonic Transducers

Gian Luca Barbruni, Sandro Carrara, Zhengwen Jiang, Yihe Zhao

Label-free biosensors, combined with miniaturized micro-electromechanical sensory platforms, offer an attractive solution for real-time and facile monitoring of biomolecules due to their high sensitivity and selectivity without the need for specifically labeling. Resonators have been acknowledged as an efficient technology for measuring biomolecular binding events including those involving nucleic acid and antibody. Among these, capacitive micromachined ultrasonic transducers (CMUTs) have emerged as a promising candidate for biosensing. However, their usage is often limited by the requirement for high voltage supply and continuous frequency tracking, which can result in significant parasitic effects and measurement errors. In this brief, we present a novel front-end interface circuit for a CMUTs-based biosensor. The circuit, fabricated using TSMC 0.18-mu m BipolarCMOS-DMOS (BCD) technology, incorporates an on-chip high voltage charge pump and feedback frequency monitoring. The CMUTs array features 20 x 20 circular cells, fabricated using a low-temperature direct bonding technology, with an experimental parallel-resonant frequency of 1.724 MHz and a high quality factor of up to 40.9. To fit the measured electrical characteristics, a five-element equivalent lumped element model is proposed. The high voltage charge pump provides an output voltage of similar to 20 V, while the feedback oscillator has a ms-level start-up time and a total power dissipation of 3.8 mW. The proposed frontend interface is designed to function as a stand-alone chip for CMUTs-based resonant biodetection.

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2023

Biocompatible and Biodegradable 3D Printing from Bioplastics: A Review

Sandro Carrara

There has been a lot of interest in developing and producing biodegradable polymers to address the current environmental problem caused by the continued usage of synthetic polymers derived from petroleum products. Bioplastics have been identified as a possible alternative to the use of conventional plastics since they are biodegradable and/or derived from renewable resources. Additive manufacturing, also referred to as 3D printing, is a field of growing interest and can contribute towards a sustainable and circular economy. The manufacturing technology also provides a wide material selection with design flexibility increasing its usage in the manufacture of parts from bioplastics. With this material flexibility, efforts have been directed towards developing 3D printing filaments from bioplastics such as Poly (lactic acid) to substitute the common fossil- based conventional plastic filaments such as Acrylonitrile butadiene styrene. Plant biomass is now utilized in the development of biocomposite materials. A lot of literature presents work done toward improving the biodegradability of printing filaments. However, additive manufacture of biocomposites from plant biomass is faced with printing challenges such as warping, low agglomeration between layers and poor mechanical properties of the printed parts. The aim of this paper is to review the technology of 3D printing using bioplastics, study the materials that have been utilized in this technology and how challenges of working with biocomposites in additive manufacture have been addressed.

MDPI2023

Robust Analog Multisensory Array System for Lossy Capacitive Sensors Over Long Distances

Sandro Carrara, Amar Kapic, Andromachi Tsirou

A robust capacitive multisensory readout system is presented in this article. The system consists of a few thousand lossy capacitive-based sensors that can be modeled as a parallel connection of sensor capacitor and undesirable leakage resistance. The real system in our application will consist of a high number of capacitive sensors used for the monitoring of relative humidity in a high-energy detector at the European Organization for Nuclear Research (CERN). However, our findings apply to any set of capacitive devices aimed at any other sensing application. Furthermore, the proposed system is intended for harsh environments (e.g., with high radiation levels and magnetic field presence) where the readout system is separated from the sensor and placed far away, connecting to them via cables. In such cases, the presence of cables brings another issue to the readout system-parasitic capacitance. Using long cables, we introduce high values of parasitic capacitance that make the sensor capacitance practically invisible to the readout unit. This article presents an effective, robust, and analog method, based on a quadrature-phase shifter and an auto-balancing bridge, used to overcome the sensor leakage resistance and parasitic capacitance caused by the cables. The experiments for various values of capacitance and leakage resistance at different frequencies and the influence of different cable lengths and types are analyzed and discussed.

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2023