Nicola Pellizzi

University of Calabria

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G. Cipparrone

University of Calabria

P. Pagliusi

University of Calabria

A. Mazzulla

Istituto di Nanotecnologia

Matteo Vitali

Politecnico di Milano

Matteo Panzeri

Politecnico di Milano

D. Petti

Politecnico di Milano

Edoardo Albisetti

Politecnico di Milano

Davide Girardi

Politecnico di Milano

Valerio Levati

Politecnico di Milano

Andrea Del Giacco

Politecnico di Milano

Cooperative Institutions

Politecnico di Milano

National Research Council

Institut de Ciència de Materials de Barcelona

Mylan (Switzerland)

University of Kaiserslautern

Istituto Nazionale per la Fisica della Materia

Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine

Instituto de Ciencia de Materiales de Sevilla

Istituto di Fotonica e Nanotecnologie

Centre National de la Recherche Scientifique

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Phase Nanoengineering via Thermal Scanning Probe Lithography and Direct Laser Writing (Adv. Mater. Technol. 16/2023)

Advanced Materials Technologies (2023)

Valerio Levati Davide Girardi Nicola Pellizzi Matteo Panzeri Matteo Vitali

Phase Nanoengineering Article 2300166 by Daniela Petti, Edoardo Albisetti, and co-workers shows the innovative approach called phase nanoengineering for crafting nanomaterials. In particular, advanced nanofabrication techniques such as thermal scanning probe lithography and direct laser writing are used to directly induce highly controlled, localized and stable changes in the electronic, magnetic or optical properties of materials down to the nanoscale, for realizing novel functionalities in nanodevices.

Nanoengineering

Nanomaterials

10.1002/admt.202370075

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Plasmon-enhanced rotational dynamics of anisotropic core-shell polymeric-metallic microparticles

Photonics Research (2022)

Nicola Pellizzi A. Mazzulla P. Pagliusi G. Cipparrone

The development of efficient and cost-effective micromachines is a challenge for applied and fundamental science, given their wide fields of usage. Light is a suitable tool to move small objects in a noncontact way, given its capabilities in exerting forces and torques. However, when complex manipulation is required, micro-objects with proper architecture could play a specific role. Here we report on the rotational dynamics of core-shell particles, with a polymeric nematic core of ellipsoidal shape capped by Au nanoparticles. They undergo a peculiar synchronous spinning and orbital motion when irradiated by a simple Gaussian beam, which originates from the coupling of the metallic nanoparticles’ optical response and the core anisotropies. The rotation capabilities are strongly enhanced when the trapping wavelength lies in the plasmonic resonance region: indeed, the spin kinetic energy reaches values two orders of magnitude larger than the one of bare microparticles. The proposed strategy brings important insights into optimizing the design of light controlled micro-objects and might benefit applications in microfluidics, microrheology, and micromachining involving rotational dynamics.

Microrheology

Nanophotonics

Gaussian beam

10.1364/prj.466396

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Correction: Collective motion of chiral Brownian particles controlled by a circularly-polarized laser beam

Soft Matter (2021)

R. Hernández Francisco J. Sevilla A. Mazzulla P. Pagliusi Nicola Pellizzi

Correction for ‘Collective motion of chiral Brownian particles controlled by a circularly-polarized laser beam’ by Raúl Josué Hernández et al., Soft Matter, 2020, 16, 7704–7714, DOI: 10.1039/C9SM02404B.

10.1039/d1sm90036f

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Collective motion of chiral Brownian particles controlled by a circularly-polarized laser beam

Soft Matter (2020)

R. Hernández Francisco J. Sevilla A. Mazzulla P. Pagliusi Nicola Pellizzi

Remote switching from passive to collective chiral-active motion by circularly-polarized light is shown for spherical polymeric Brownian particles. Light-propulsion is triggered by the coupling between the particle's chirality and the light helicity.

Helicity

Chirality

Collective motion

Particle (ecology)

10.1039/c9sm02404b

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Core-shell chiral polymeric-metallic particles obtained in a single step by concurrent light induced processes

Journal of Colloid and Interface Science (2021)

Nicola Pellizzi A. Mazzulla P. Pagliusi G. Cipparrone

Chloroauric acid

10.1016/j.jcis.2021.07.143

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Citations (1)

Self Biased Integrated Magnonic Device

arXiv (Cornell University) (2025)

Maria Cocconcelli Federico Maspero Andrea Micelli Alberto Toniato Andrea Del Giacco

In the race towards "beyond 6G" telecommunication platforms, magnonics emerges as a promising solution due to its wide tunability within the FR3 band (7-24 GHz). So far, however, the need for an external magnetic bias field to allow the coherent excitation of spin waves has been a major bottleneck. Conventional bulky electromagnets are power-intensive and challenging to integrate on-chip, restricting magnonic applications largely to academic research. Here, we present the first demonstration of a standalone, tunable magnonic device featuring all-electric input and output, fully integrated on a silicon substrate with a compact footprint of 100 x 150 $\mu$m. The device consists of a CoFeB waveguide equipped with two radio frequency antennas, flanked by a symmetric configuration of T-shaped magnetic flux concentrators and rectangular SmCo permanent micromagnets. By varying the distance D between the flux concentrators and the permanent magnets from 0 to 12 $\mu$m, the transverse bias field can be tuned from 20.5 mT to 11 mT, respectively. This variation directly modulates the dispersion relation of Damon-Eshbach spin wave modes in the CoFeB waveguide. In these proof-of-concept devices, the spin wave frequency band ranges from 3 to 8 GHz, with precise phase shift tuning of up to 120 degrees at 6 GHz achieved by varying D within the 0-8 $\mu$m range. The operational frequency band could even be pushed to higher frequencies through optimized micromagnet engineering.

10.48550/arxiv.2502.03186

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Phase Nanoengineering via Thermal Scanning Probe Lithography and Direct Laser Writing

Advanced Materials Technologies (2023)

Valerio Levati Davide Girardi Nicola Pellizzi Matteo Panzeri Matteo Vitali

Abstract Nanomaterials derive their electronic, magnetic, and optical properties from their specific nanostructure. In most cases, nanostructured materials and their properties are defined during the materials growth, and nanofabrication techniques, such as lithography, are employed subsequently for device fabrication. Herein, a perspective is presented on a different approach for creating nanomaterials and devices where, after growth, advanced nanofabrication techniques are used to directly nanostructure condensed matter systems, by inducing highly controlled, localized, and stable changes in the electronic, magnetic, or optical properties. Then, advantages, limitations, applications in materials science and technology are highlighted, and future perspectives are discussed.

Nanoengineering

Nanomaterials

10.1002/admt.202300166

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Electroactive substrates for surface-enhanced Raman spectroscopy based on overgrown gold-nanoparticle arrays by electrodeposition on indium tin oxide

Materials Advances (2023)

Nerea Gonzalez‐Pato Xavier Rodriguez Rodriguez Nicola Pellizzi Claudia Fasolato Judith Guasch

Highly homogeneous and robust SERS conductive surfaces with large gold coverages and small inter-particle distances for a combined electrochemical-SERS investigation to monitor switchable redox molecules and electroactivated interfacial reactions.

Indium tin oxide

Surface-Enhanced Raman Spectroscopy

Particle (ecology)

10.1039/d2ma00914e

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Three-dimensional nanoscale control of magnetism in crystalline Yttrium Iron Garnet

arXiv (Cornell University) (2024)

Valerio Levati Matteo Vitali Andrea Del Giacco Nicola Pellizzi Raffaele Silvani

The exceptional magnetic, optical and phononic properties of Yttrium Iron Garnet (YIG) make it unique for spin-wave based and photonic applications. Yet, nanostructuring crystalline YIG and manipulating its magnetism in a non-destructive way is an outstanding challenge, and so far mostly limited to two-dimensional capabilities. Here, we show that irradiation of single-crystal YIG films with a focused UV laser drives a stable, giant enhancement of the perpendicular magnetic anisotropy, preserving the crystalline quality. This modulation is highly confined at the nanoscale in both the lateral and vertical directions, and its extension within the volume can be finely tuned with a continuous depth-control. By harnessing these three-dimensional anisotropy profiles, we demonstrate a large tuning of the spin-wave band structure, volume spatial localization, and non-reciprocity, realizing proof-of-principle 3D magnonic crystals. This straightforward, single-step, laser nanofabrication of three-dimensional magnetic systems based on crystalline YIG thin films opens the way to design novel functions in magnonic and magneto-optic devices.

Magnetism

Yttrium Iron Garnet

10.48550/arxiv.2409.17722

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