Publications by Francesco Bellando

Negative Capacitance in HfO2 Gate Stack Structures With and Without Metal Interlayer

Igor Stolichnov, Mihai Adrian Ionescu, Ali Saeidi, Francesco Bellando, Matteo Cavalieri, Eamon Patrick O'Connor, Carlotta Gastaldi

In this work, we experimentally explore and compare FET gate stacks with and without an inner metal plane between a linear dielectric (SiO2) and a ferroelectric layer (Si-doped HfO2) operating in the negative capacitance (NC) regime. The use of nanosecond- ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022

Sensitivity, Noise and Resolution in a B -Modified Foundry-Made ISFET with Miniaturized Reference Electrode for Wearable Point-of-Care Applications

Mihai Adrian Ionescu, Luca Selmi, Junrui Zhang, Francesco Bellando, Pierpaolo Palestri

Ion-sensitive field-effect transistors (ISFETs) form a high sensitivity and scalable class of sensors, compatible with advanced complementary metal-oxide semiconductor (CMOS) processes. Despite many previous demonstrations about their merits as low-power i ...

2021

Monolithically Integrated Catalyst-Free High Aspect Ratio InAs-on-Insulator (InAsOI) FinFETs for pH Sensing

Mihai Adrian Ionescu, Fabien Patrick Wildhaber, Maneesha Rupakula, Junrui Zhang, Francesco Bellando, Clarissa Convertino

In this work, we report a novel Indium Arsenide-on-insulator (InAsOI) FinFET platform designed with record high aspect ratio that favors the use of the devices as charge sensors. InAs has very high mobility among III-V semiconductors and an intrinsic surfa ...

2020

Subthermionic negative capacitance ion sensitive field-effect transistor

Mihai Adrian Ionescu, Ali Saeidi, Francesco Bellando, Carlotta Gastaldi

One of the main advantages of Ion-Sensitive Field-Effect Transistor (ISFET) technology is the capability to exploit technological advancements initially developed for conventional FETs for logic applications, such as the employ of high-k dielectrics for th ...

2020

Negative capacitance semiconductor sensor

Mihai Adrian Ionescu, Ali Saeidi, Francesco Bellando

The present invention relates to a semiconductor sensor (1) comprising: a source element (17, 19); a drain element (21, 23); a semiconductor channel element (25) between the source element (17, 19) and the drain element (21, 23) for forming an electrically ...

2020

Sweat monitoring with CMOS compatible technology: ISFETS and beyond

Francesco Bellando

In recent years, sweat has gained increasing attention from the scientific community as a new analyte for health monitoring. The main advantage with respect to the "Gold Standard" for laboratory analysis, i.e. blood, is of course the possibility of perform ...

EPFL2020

Apparatus for non-invasive sensing of biomarkers in human sweat

Mihai Adrian Ionescu, Fabien Patrick Wildhaber, Johan Frédéric Longo, Hoël Maxime Guérin, Erick Antonio Garcia Cordero, Francesco Bellando

Presented herein are devices for collecting and/or channeling a biofluid (e.g., sweat, tears, saliva) and detecting and/or quantifying one or more biomarkers in the biofluid. The biomarker(s) may include, for example, ions, salts thereof, hormones and/or s ...

2019

Monolithically integrated catalyst-free High Aspect Ratio InAs-On-Insulator (InAsOI) FinFETs for pH sensing

Mihai Adrian Ionescu, Kirsten Emilie Moselund, Fabien Patrick Wildhaber, Maneesha Rupakula, Junrui Zhang, Francesco Bellando, Clarissa Convertino

In this work, we report a novel Indium Arsenide-on-insulator (InAsOI) FinFET platform designed with record high aspect ratio that favor the use of the devices as charge sensors. InAs has very high mobility among III-V semiconductors and an intrinsic surfac ...

IEEE2019

Capillary flow device for bio-fluid collection with semiconductor sensors

Mihai Adrian Ionescu, Hoël Maxime Guérin, Erick Antonio Garcia Cordero, Francesco Bellando

An on-body wearable bio-fluid collection and sensing device including an interface or interface surface comprising at least one biocompatible material for contacting a bodily part; at least one inlet for receiving the bio-fluid, at least one outlet for eva ...

2019

Sweat Biomarker Sensor Incorporating Picowatt, Three-Dimensional Extended Metal Gate Ion Sensitive Field Effect Transistors

Mihai Adrian Ionescu, Fabien Patrick Wildhaber, Hoël Maxime Guérin, Maneesha Rupakula, Erick Antonio Garcia Cordero, Junrui Zhang, Francesco Bellando, Guillaume Charles Henri Herment

Ion sensitive field effect transistors (ISFETs) form a very attractive solution for wearable sensors due to their capacity for ultra-miniaturization, low power operation, and very high sensitivity, supported by complementary metal oxide semiconductor (CMOS ...

2019

Field-effect transistor device or sensor for sensing ions, molecules or biomarkers in a fluid

Mihai Adrian Ionescu, Erick Antonio Garcia Cordero, Junrui Zhang, Francesco Bellando

The present disclosure concerns a Field-Effect Transistor device or sensor comprising at least one drain region, at least one source region, at least a channel region, at least a first gate connected to the channel region, at least one stack comprising at ...

2019

CMOS 3D-Extended Metal Gate ISFETs with Near Nernstian Ion Sensitivity

Mihai Adrian Ionescu, Fabien Patrick Wildhaber, Johan Frédéric Longo, Hoël Maxime Guérin, Maneesha Rupakula, Erick Antonio Garcia Cordero, Junrui Zhang, Francesco Bellando, Neil Ebejer

IEEE2018

Three-Dimensional Integrated Ultra-Low-Volume Passive Microfluidics with Ion-Sensitive Field-Effect Transistors for Multiparameter Wearable Sweat Analyzers

Mihai Adrian Ionescu, Fabien Patrick Wildhaber, Johan Frédéric Longo, Hoël Maxime Guérin, Erick Antonio Garcia Cordero, Junrui Zhang, Francesco Bellando

Wearable systems could offer noninvasive and real-time solutions for monitoring of biomarkers in human sweat as an alternative to blood testing. Recent studies have demonstrated that the concentration of certain biomarkers in sweat can be directly correlat ...

2018

Capillary flow device for bio-fluid collection with semiconductor sensors

Mihai Adrian Ionescu, Hoël Maxime Guérin, Erick Antonio Garcia Cordero, Francesco Bellando

An on-body wearable bio-fluid collection and sensing device including an interface or interface surface comprising at least one biocompatible material for contacting a bodily part; at least one inlet for receiving the bio-fluid, at least one outlet for eva ...

2018

Embedded Passive Nano-Liter Micropump For Sweat Collection And Analysis

Mihai Adrian Ionescu, Fabien Patrick Wildhaber, Montserrat Fernandez-Bolanos Badia, Johan Frédéric Longo, Hoël Maxime Guérin, Erick Antonio Garcia Cordero, Francesco Bellando

This paper presents a method to integrate biocompatible passive microfluidic systems within a sensing platform to allow continuous analysis of sweat in a wearable microsystem. The technology is promising for miniaturization of systems to enable access to b ...

IEEE2018

All CMOS Integrated 3D-Extended Metal Gate ISFETs for pH and Multi-Ion (Na+, K+, Ca2+) sensing

Mihai Adrian Ionescu, Fabien Patrick Wildhaber, Johan Frédéric Longo, Hoël Maxime Guérin, Maneesha Rupakula, Erick Antonio Garcia Cordero, Junrui Zhang, Francesco Bellando, Guillaume Charles Henri Herment

This paper reports for the first time, smart 3D-Extended-Metal-Gate Ion-Sensitive-Field-Effect-Transistors (3D-EMG-ISFETs), with unique figures of merit: (i) extremely-low-power (down to a record value of 2 pW per sensor under excellent linearity), (ii) al ...

IEEE2018

Negative Capacitance Field Effect Transistors; Capacitance Matching and non-Hysteretic Operation

Christian Enz, Igor Stolichnov, Mihai Adrian Ionescu, Farzan Jazaeri, Ali Saeidi, Francesco Bellando

This work experimentally demonstrates negative capacitance MOSFETs in hysteretic and non-hysteretic modes of operation. A PZT capacitor is externally connected to the gate of commercial nMOSFETs fabricated in 28nm CMOS technology to explore the negative ca ...

IEEE2017

Negative Capacitance as Performance Booster for Tunnel FETs and MOSFETs: An Experimental Study

Christian Enz, Igor Stolichnov, Mihai Adrian Ionescu, Farzan Jazaeri, Ali Saeidi, Francesco Bellando

This letter reports for the first time a full experimental study of performance boosting of tunnel FETs (TFETs) and MOSFETs by negative capacitance (NC) effect. We discuss the importance of capacitance matching between a ferroelectric NC and a device capac ...

Institute of Electrical and Electronics Engineers2017

Lab on skin™: 3D monolithically integrated zero-energy micro/nanofludics and FD SOI ion sensitive FETs for wearable multi-sensing sweat applications

Mihai Adrian Ionescu, Fabien Patrick Wildhaber, Johan Frédéric Longo, Hoël Maxime Guérin, Erick Antonio Garcia Cordero, Francesco Bellando

This paper reports a novel fully integrated low power multi-sensing smart system, which, by wafer-level 3D heterogeneous integration of Ion Sensitive Fully Depleted (FD) FETs and SU-8 micro/nanofludics, achieves the first of its kind wearable multi-sensing ...

2017

Ultra-Low Power Ion-Sensing Smart Platform for Noninvasive Healthcare Applications

Mihai Adrian Ionescu, Hoël Maxime Guérin, Erick Antonio Garcia Cordero, Amira Muhech Medrano, Francesco Bellando

The development of nanotechnologies, and the advent of micro/nano-sensors with novel functionalities integrated on flexible substrates, has opened the way to the development of wearable technology. Interest in wearable technology comes from the considerabl ...

2016