Leandro Lorenzelli

Dr. Leandro Lorenzelli

Sensors and Devices Center - Microsystems Unit, Fondazione Bruno Kessler, Trento, Trentino-Alto Adige, Italy
orcid

Research Focus & Metrics

Academic Career Length

31Years (1996-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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4 December 2014 in IEEE Sensors Journal
Verified
Journal Article
Open access
SKSaleem Khan
Saleem Khan
Leandro LorenzelliLeandro Lorenzelli
Leandro Lorenzelli
RDRavinder Dahiya
Ravinder Dahiya
Printing sensors and electronics over flexible substrates are an area of significant interest due to low-cost fabrication and possibility of obtaining multifunctional electronics over large areas. Over the years, a number of printing technologies have been developed to pattern a wide range of electronic materials on diverse substrates. As further expansion of printed technologies is expected in future for sensors and electronics, it is opportune to review the common features, the complementarities, and the challenges associated with various printing technologies. This paper presents a comprehensive review of various printing technologies, commonly used substrates and electronic materials. Various solution/dry printing and contact/noncontact printing technologies have been assessed on the basis of technological, materials, and process-related developments in the field. Critical challenges in various printing techniques and potential research directions have been highlighted. Possibilities of merging various printing methodologies have been explored to extend the lab developed standalone systems to high-speed roll-to-roll production lines for system level integration.

1 June 2018 in Biosensors and Bioelectronics
Verified
Journal Article
Closed access
WDWenting Dang
Wenting Dang
LMLibu Manjakkal
Libu Manjakkal
WNWilliam Navaraj
William Navaraj
Leandro LorenzelliLeandro Lorenzelli
Leandro Lorenzelli
VVVincenzo Vinciguerra
Vincenzo Vinciguerra
RDRavinder Dahiya
Ravinder Dahiya

12 October 2015 in Advanced Robotics
Verified
Journal Article
Open access
NYN. Yogeswaran
N. Yogeswaran
WDW. Dang
W. Dang
WNWilliam Navaraj
William Navaraj
DSD. Shakthivel
D. Shakthivel
SKS. Khan
S. Khan
RDRavinder Dahiya
Ravinder Dahiya
Flexible electronics has huge potential to bring revolution in robotics and prosthetics as well as to bring about the next big evolution in electronics industry. In robotics and related applications, it is expected to revolutionise the way with which machines interact with humans, real-world objects and the environment. For example, the conformable electronic or tactile skin on robot’s body, enabled by advances in flexible electronics, will allow safe robotic interaction during physical contact of robot with various objects. Developing a conformable, bendable and stretchable electronic system requires distributing electronics over large non-planar surfaces and movable components. The current research focus in this direction is marked by the use of novel materials or by the smart engineering of the traditional materials to develop new sensors, electronics on substrates that can be wrapped around curved surfaces. Attempts are being made to achieve flexibility/stretchability in e-skin while retaining a reliable operation. This review provides insight into various materials that have been used in the development of flexible electronics primarily for e-skin applications.

26 November 2014 in IEEE Sensors Journal
Verified
Journal Article
Open access
SKSaleem Khan
Saleem Khan
STSajina Tinku
Sajina Tinku
Leandro LorenzelliLeandro Lorenzelli
Leandro Lorenzelli
RDRavinder Dahiya
Ravinder Dahiya
This paper presents and compares two different types of screen-printed flexible and conformable pressure sensors arrays. In both variants, the flexible pressure sensors are in the form of segmental arrays of parallel plate structure-sandwiching the piezoelectric polymer polyvinylidene fluoride trifluoroethylene [P(VDF-TrFE)] between two printed metal layers of silver (Ag) in one case and the piezoresistive [multiwall carbon nanotube (MWCNT) mixed with poly(dimethylsiloxane (PDMS)] layer in the other. Each sensor module consists of 4 × 4 sensors array with 1-mm × 1-mm sensitive area of each sensor. The screen-printed piezoelectric sensors array exploits the change in polarization level of P(VDF-TrFE) to detect dynamic tactile parameter such as contact force. Similarly, the piezoresistive sensors array exploits the change in resistance of the bulk printed layer of MWCNT/PDMS composite. The two variants are compared on the basis of fabrication by printing on plastic substrate, ease of processing and handling of the materials, compatibility of the dissimilar materials in multilayers structure, adhesion, and finally according to the response to the normal compressive forces. The foldable pressure sensors arrays are completely realized using screen-printing technology and are targeted toward realizing low-cost electronic skin.

20 July 2009 in Applied Physics Letters
Verified
Journal Article
Closed access
RDRavinder Dahiya
Ravinder Dahiya
GMGiorgio Metta
Giorgio Metta
Maurizio ValleMaurizio Valle
Maurizio Valle
AAAndrea Adami
Andrea Adami
Leandro LorenzelliLeandro Lorenzelli
Leandro Lorenzelli
This work presents piezoelectric oxide semiconductor field effect transistor (POSFET) based touch sensing devices. These devices are fabricated by spin coating thin (∼2.5 μm) piezoelectric polymer film directly on to the gate area of metal oxide semiconductor (MOS) transistor. The polymer film is processed in situ and challenging issues such as in situ poling of piezoelectric polymer film, without damaging or altering the characteristics of underlying MOS devices, are successfully dealt with. The POSFET device represents an integral “sensotronic” unit comprising of transducer and the transistor—thereby sensing as well as conditioning (and processing) the touch signal at “same site.”

1 March 2017 in Flexible and Printed Electronics
Verified
Journal Article
Open access
PDF file
WDWenting Dang
Wenting Dang
VVVincenzo Vinciguerra
Vincenzo Vinciguerra
Leandro LorenzelliLeandro Lorenzelli
Leandro Lorenzelli
RDRavinder Dahiya
Ravinder Dahiya