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Giovanni Boero

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Related publications (86)

Page 3 of 5

Thermal and pH Sensitive Composite Membrane for On-Demand Drug Delivery by Applying an Alternating Magnetic Field

Jürgen Brugger, Giovanni Boero, Xiao Sheng Zhang, Ya Wang

Implantable drug delivery systems that can realize a scheduled drug release according to the needs of patients would be highly beneficial for the treatment of chronic diseases and cancer. Here, micrometer‐sized hydrogel particles with both thermal and pH s ...

2020

Granular Co-C nano-Hall sensors by focused-beam-induced deposition

Giovanni Boero, Ivo Utke, Laurent Bernau

We investigated the performance of Hall sensors with different Co-C ratios, deposited directly in nanostructured form, using Co-2(CO)(8) gas molecules, by focused-electron or ion-beam-induced deposition. Due to the enhanced intergrain scattering in these g ...

2010

Harnessing Poisson Effect to Realize Tunable Tunneling Nanogap Electrodes on PDMS Substrates for Strain Sensing

Jürgen Brugger, Giovanni Boero, Henry Shao-Chi Yu

Nanogap electrodes (NGEs) are a fundamental structure for the exploration of nanoscale phenomena. In this paper, we describe the fabrication and the electro-mechanical characterization of tunable tunneling NGEs on a stretchable PDMS substrate. Bottom-up ca ...

IEEE2019

A Low Power 35 GHz HEMT Oscillator for Electron Spin Resonance Spectroscopy

Giovanni Boero, Nergiz Sahin Solmaz, Alessandro Valentino Matheoud

This paper presents a low power microwave oscillator designed as sensor for electron spin resonance (ESR) spectroscopy. Low power consumption is necessary for low temperature operation. Additionally, lower power consumption allows for a lower microwave mag ...

IEEE2021

Longitudinal detection of ferromagnetic resonance using x-ray transmission measurements

Giovanni Boero, Stefano Rusponi, Pietro Gambardella

We describe a setup for the x-ray detection of ferromagnetic resonance in the longitudinal geometry using element-specific transmission measurements. Thin magnetic film samples are placed in a static magnetic field collinear with the propagation direction ...

American Institute of Physics2009

Cell force measurements in 3D microfabricated environments based on compliant cantilevers

Jürgen Brugger, Giovanni Boero, Mattia Marelli

We report the fabrication, functionalization and testing of microdevices for cell culture and cell traction force measurements in three-dimensions (3D). The devices are composed of bent cantilevers patterned with cell-adhesive spots not lying on the same p ...

Royal Soc Chemistry2014

Thermal annihilation of photo-induced radicals following dynamic nuclear polarization to produce transportable frozen hyperpolarized 13C-substrates

Tian Cheng, Arnaud Comment, Giovanni Boero, Christophe Roussel, Andrea Capozzi

Hyperpolarization via dynamic nuclear polarization (DNP) is pivotal for boosting magnetic resonance imaging (MRI) sensitivity and dissolution DNP can be used to perform in vivo real-time 13C MRI. The type of applications is however limited by the relativel ...

Nature Publishing Group2017

Single chip dynamic nuclear polarization microsystem

Giovanni Boero, Marco Grisi, Nergiz Sahin Solmaz, Alessandro Valentino Matheoud, Gabriele Gualco

Integration of the sensitivity-relevant electronics of nuclear magnetic resonance (NMR) and electron spin resonance (ESR) spectrometers on a single chip is a promising approach to improve the limit of detection, especially for samples in the nanoliter and ...

2020

Combined Al-protection and HF-vapor release process for ultrathin single crystal silicon cantilevers

Jürgen Brugger, Giovanni Boero, Schahrazede-Lila Mouaziz

A new technology based on a combination of Al-protection layers and HF-vapor etching to produce ultrathin single crystal silicon cantilevers is presented. 500 um long, 10 um wide and 0.5 um thick cantilevers have been fabricated with a high yield. A resona ...

2006

Stretchable Conductors Fabricated by Stencil Lithography and Centrifugal Force-Assisted Patterning of Liquid Metal

Jürgen Brugger, Giovanni Boero, Yi-Chiang Sun

Embedding liquid metals (LMs) into an elastomer is emerging as a promising strategy for stretchable conductors. Existing manufacturing techniques are struggling between spatial resolution and process complexity and are limited to chemically resistant subst ...

2021

Microwave inductive proximity sensors with sub-pm/Hz1/2 resolution

Giovanni Boero, Nergiz Sahin Solmaz, Alessandro Valentino Matheoud

Inductive proximity sensors are low-cost and versatile detectors achieving resolutions in the nm and sub-nm range. Their typical working frequency ranges from tens of kHz to a few MHz. Operation at higher frequencies is considered as a possible route for t ...

2019

Electron paramagnetic resonance magnetic field sensors for particle accelerators

Giovanni Boero, Alessandro Valentino Matheoud, Anthony Jean Beaumont

We report on four electron paramagnetic resonance sensors for dynamic magnetic field measurements at 36 mT, 100 mT, 360 mT, and 710 mT. The sensors are based on grounded co-planar microwave resonators operating at about 1 GHz and 3 GHz, realized using prin ...

2020

Integrated active tracking detector for MRI-guided interventions

Giovanni Boero, Jens Anders

We present a fully integrated detector suitable for active tracking of interventional devices in MR-guided interventions. The single-chip microsystem consists of a detection coil, a tuning capacitor, an intermediate frequency downconversion receiver, and a ...

Wiley2012

Microscopic four-point probe based on SU-8 cantilevers

Jürgen Brugger, Giovanni Boero, Schahrazede-Lila Mouaziz

A microscopic four-point probe (micro4PP) for resistivity measurements on thin films was designed and fabricated using the negative photoresist SU-8 as base material. The device consists of four microscopic cantilevers, each of them supporting a probe tip ...

2005

A Low-Noise CMOS Receiver Frontend for NMR-based Surgical Guidance

Giovanni Boero, Jens Anders

In this paper a novel architecture for an integrated NMR receiver front-end for surgical guidance applications is described. While the chip consumes only 9 mA supply current from a 3.3 V power supply it has a measured input referred noise density of 0.7 nV ...

Springer, 233 Spring Street, New York, Ny 10013, United States2009

Combining thermal scanning probe lithography and dry etching for grayscale nanopattern amplification

Jürgen Brugger, Andras Kis, Giovanni Boero, Arnaud Bertsch, Georg Fantner, Zhenyu Wang, Marcos Penedo Garcia, Xia Liu, Mitali Banerjee, Ana Conde Rubio, Berke Erbas, Joffrey Pernollet

Grayscale structured surfaces with nanometer-scale features are used in a growing number of applications in optics and fluidics. Thermal scanning probe lithography achieves a lateral resolution below 10 nm and a vertical resolution below 1 nm, but its maxi ...

Springernature2024

Cleaning strategy for carbon-based electrodes: Long-term propofol monitoring in human serum

Giovanni De Micheli, Giovanni Boero, Irene Taurino, Francesca Stradolini, Tugba Kilic

In this work, we present a novel electrochemical cleaning procedure for long-term electrochemical monitoring of propofol by using boron-doped diamond (BDD) and pencil graphite electrode (PGE). Propofol is an anesthetic that is widely used for long-lasting ...

Elsevier2018

Electrically conducting probes with full tungsten cantilever and tip for scanning probe applications

Jürgen Brugger, Andrzej Kulik, Giovanni Boero, Florian Calame, Kyumin Lee, Johannes Steen

We have developed a new hybrid AFM probe combining an SU-8 polymer body with a full tungsten cantilever having a nanometric tip. The fabrication is based on surface micromachining a silicon wafer, where tungsten is sputter deposited in oxidation sharpened ...

2006

NMR spectroscopy of single sub-nL ova with inductive ultra-compact single-chip probes

Giovanni Boero, Nicola Harris, Marco Grisi, Beatrice Volpe, Franck Vincent

Nuclear magnetic resonance (NMR) spectroscopy enables non-invasive chemical studies of intact living matter. However, the use of NMR at the volume scale typical of microorganisms is hindered by sensitivity limitations, and experiments on single intact orga ...

Nature Research2017

Submicrometer Hall devices fabricated by focused electron-beam-induced deposition

Jürgen Brugger, Niels Quack, Giovanni Boero, Patrik Willi Hoffmann, Radivoje Popovic, Pavel Kejik, Schahrazede-Lila Mouaziz, Tristan Bret

Hall devices having an active area of about (500 nm)2 are fabricated by focused electron-beam-induced deposition. The deposited material consists of cobalt nanoparticles in a carbonaceous matrix. The realized devices have, at room temperature, a current se ...

2005