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Francesco Rizzi   Dr.  Technician or Assistant 
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Francesco Rizzi published an article in March 2019.
Top co-authors See all
Christian Demitri

52 shared publications

Department of Engineering for Innovation, University of Salento, Lecce 73100, Italy.

Massimo De Vittorio

21 shared publications

Center for Bio-Molecular [email protected], Istituto Italiano di Tecnologia, Via Eugenio Barsanti 14, 73010 Arnesano (LE), Italy.

Antonio Qualtieri

17 shared publications

Center for Bio-Molecular [email protected], Istituto Italiano di Tecnologia, Via Eugenio Barsanti 14, 73010 Arnesano (LE), Italy.

Francesco Guido

9 shared publications

Istituto Italiano di Tecnologia (IIT), Center for Biomolecular Nanotechnologies, Via Barsanti, 73010 Arnesano, Italy

Gianmichele Epifani

8 shared publications

Istituto di Nanotecnologia, Consiglio Nazionale delle Ricerche, 73100 Lecce, Italy.

45
Publications
5
Reads
0
Downloads
99
Citations
Publication Record
Distribution of Articles published per year 
(2001 - 2019)
Total number of journals
published in
 
36
 
Publications See all
Article 0 Reads 0 Citations Design and Fabrication by Thermal Imprint Lithography and Mechanical Characterization of a Ring-Based PDMS Soft Probe fo... Tommaso Dattoma, Antonio Qualtieri, Gianmichele Epifani, Mas... Published: 05 March 2019
Polymers, doi: 10.3390/polym11030424
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
In this paper, the design, fabrication and mechanical characterization of a novel polydimethylsiloxane (PDMS) soft probe for delivering and sensing forces in biological systems is proposed. On the basis of preliminary finite element (FEM) analysis, the design takes advantage of a suitable core geometry, characterized by a variable spring-like ring. The compliance of probes can be finely set in a wide range to measure forces in the micronewton to nanonewton range. In particular, this is accomplished by properly resizing the ring geometry and/or exploiting the mixing ratio-based elastic properties of PDMS. Fabrication by the thermal imprint lithography method allows fast and accurate tuning of ring sizes and tailoring of the contact section to their targets. By only varying geometrical parameters, the stiffness ranges from 1080 mNm-1 to 50 mNm-1, but by changing the base-curing agent proportion of the elastomer from 10:1 to 30:1, the stiffness drops to 37 mNm-1. With these compliances, the proposed device will provide a new experimental tool for investigating force-dependent biological functions in sensory systems.
Article 0 Reads 0 Citations 3D-microfabrication by two-photon polymerization of an integrated sacrificial stencil mask Salvatore Puce, Elisa Sciurti, Francesco Rizzi, Barbara Spag... Published: 01 March 2019
Micro and Nano Engineering, doi: 10.1016/j.mne.2019.01.004
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This work aims at developing a new and unconventional Sacrificial Stencil Mask (SSM) technology by exploiting Two-Photon Polymerization (2PP) in an IP-L/SU-8 double layer resist system. The process consists of the sequential deposition of two different resists, such as SU-8 and IPL, onto the same glass substrate, followed by 2PP lithography and distinct development processes. The 2PP writing process was used to polymerize structures inside the top and bottom resist layers to form, in one single exposure process, both SSM and a permanent polymeric structure, in our case a plain pedestal. The top IPL resist was developed using Isopropyl Alcohol (IPA), which does not affect either exposed or un-exposed SU-8 regions. In this way, structures written into the bottom layer remained latent, while exposed areas of the top IPL resist, including the stencil mask, were developed. The realization of 3D stencil masks, designed to be anchored inside the un-exposed bottom layer, was combined with metal evaporation to demonstrate the deposition of a plain metal line through the stencil mask. The final development of the bottom layer led to the lift off of the sacrificial stencil mask, uncovering the underlying, permanent polymer-metal structure. The combination of sacrificial polymer structures with permanent ones opens new possibilities in 3D MEMS design, enabling the integration of distributed electronic transducers in flexible polymeric structures.
Article 0 Reads 0 Citations Bidirectional biomimetic flow sensing with antiparallel and curved artificial hair sensors Claudio Abels, Antonio Qualtieri, Toni Lober, Alessandro Mar... Published: 03 January 2019
Beilstein Journal of Nanotechnology, doi: 10.3762/bjnano.10.4
DOI See at publisher website
Article 0 Reads 0 Citations Bidirectional biomimetic flow sensing with antiparallel and curved artificial hair sensors. Claudio Abels, Antonio Qualtieri, Toni Lober, Alessandro Mar... Published: 03 January 2019
Beilstein Journal of Nanotechnology,
PubMed View at PubMed ABS Show/hide abstract
Background: Flow stimuli in the natural world are varied and contain a wide variety of directional information. Nature has developed morphological polarity and bidirectional arrangements for flow sensing to filter the incoming stimuli. Inspired by the neuromasts found in the lateral line of fish, we present a novel flow sensor design based on two curved cantilevers with bending orientation antiparallel to each other. Antiparallel cantilever pairs were designed, fabricated and compared to a single cantilever based hair sensor in terms of sensitivity to temperature changes and their response to changes in relative air flow direction. Results: In bidirectional air flow, antiparallel cantilever pairs exhibit an axially symmetrical sensitivity between 40 μV/(m s-1) for the lower air flow velocity range (between ±10-20 m s-1) and 80 μV/(m s-1) for a higher air flow velocity range (between ±20-32 m s-1). The antiparallel cantilever design improves directional sensitivity and provides a sinusoidal response to flow angle. In forward flow, the single sensor reaches its saturation limitation, flattening at 67% of the ideal sinusoidal curve which is earlier than the antiparallel cantilevers at 75%. The antiparallel artificial hair sensor better compensates for temperature changes than the single sensor. Conclusion: This work demonstrated the successive improvement of the bidirectional sensitivity, that is, improved temperature compensation, decreased noise generation and symmetrical response behaviour. In the antiparallel configuration, one of the two cantilevers always extends out into the free stream flow, remaining sensitive to directional flow and preserving a sensitivity to further flow stimuli.
Article 0 Reads 0 Citations A thermo-activated tactile micro-actuator for displays Salvatore Puce, Tommaso Dattoma, Francesco Rizzi, Mohamed Em... Published: 01 January 2019
Microelectronic Engineering, doi: 10.1016/j.mee.2018.11.010
DOI See at publisher website
Article 0 Reads 0 Citations Including Liquid Metal into Porous Elastomeric Films for Flexible and Enzyme-Free Glucose Fuel Cells: A Preliminary Eval... Denis Desmaële, Francesco La Malfa, Francesco Rizzi, Antonio... Published: 22 November 2018
Journal of Low Power Electronics and Applications, doi: 10.3390/jlpea8040045
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This communication introduces a new flexible elastomeric composite film, which can directly convert the chemical energy of glucose into electricity. The fabrication process is simple, and no specific equipment is required. Notably, the liquid metal Galinstan is exploited with a two-fold objective: (i) Galinstan particles are mixed with polydimethylsiloxane to obtain a highly conductive porous thick film scaffold; (ii) the presence of Galinstan in the composite film enables the direct growth of highly catalytic gold structures. As a first proof of concept, we demonstrate that when immersed in a 20 mM glucose solution, a 5 mm-long, 5 mm-wide and 2 mm-thick sample can generate a volumetric power density up to 3.6 mW·cm−3 at 7 mA·cm−3 and 0.51 V without using any enzymes.
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