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4. Enhancing Secondary Alkaline Battery Performance: Synthesis and Electrochemical Characterization of Zn Anodes, Based on ZnO@C Core‐Shell Nanoparticles.

Author

Emanuele, Elisa, Li Bassi, Andrea, Macrelli, Andrea, Magagnin, Luca, and Bozzini, Benedetto

Subjects
ALKALINE batteries, STORAGE batteries, HYDROGEN evolution reactions, NANOPARTICLES, ENERGY density, ANODES, ALUMINUM foil
Abstract

While alkaline Zn batteries, like traditional rechargeable aqueous batteries, boast an advantage in terms of energy density, their progress has been hampered by concerns related to the anode. These concerns include issues like Zn dendrites, self‐corrosion, passivation, shape change, and the hydrogen evolution reaction (HER). To tackle these challenges, we have introduced a nanostructuring approach for the anode, employing carbon‐coated ZnO nanoparticles (ZnO@C) as the active material. In this study, we synthesized ZnO@C nanoparticles in an environmentally sustainable and scalable manner to address passivation and dissolution issues jointly. Nanoscale ZnO particles effectively prevent passivation, while carbon shell slows down the dissolution of zincate. The Zn anode exhibits a significant performance boost when compared to Zn foil and bare ZnO nanoparticles, even when subjected to demanding conditions (without the use of ZnO‐saturated electrolyte). This rechargeable Zn anode marks a significant step toward the realization of practical, high‐energy rechargeable aqueous batteries, such as Zn‐air batteries. [ABSTRACT FROM AUTHOR]

Published
2024
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12. A Combined Raman Spectroscopy and Atomic Force Microscopy System for In Situ and Real-Time Measures in Electrochemical Cells

Author

Bussetti, Gianlorenzo, primary, Menegazzo, Marco, additional, Mitko, Sergei, additional, Castiglioni, Chiara, additional, Tommasini, Matteo, additional, Lucotti, Andrea, additional, Magagnin, Luca, additional, Russo, Valeria, additional, Li Bassi, Andrea, additional, Siena, Martina, additional, Guadagnini, Alberto, additional, Grillo, Samuele, additional, Del Curto, Davide, additional, and Duò, Lamberto, additional

Published
2023
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17. Raman Spectroscopy of 2D MoS 2 Interacting with Metals.

Author

Tumino, Francesco, D'Agosta, Paolo, Russo, Valeria, Li Bassi, Andrea, and Casari, Carlo Spartaco

Subjects
TRANSITION metals, MOLYBDENUM disulfide, METAL fabrication, METALS, OPTOELECTRONIC devices, RAMAN spectroscopy
Abstract

The research on molybdenum disulphide (MoS 2 ) has progressed remarkably in the last decade, prompted by the increasing interest for this material as a potential candidate in future ultrathin optoelectronic devices. MoS 2 is a layered semiconductor with a gap in the visible region, which can be exfoliated down to the mono-layer form. Since the discovery of the exceptional optoelectronic properties of 2D MoS 2 , Raman spectroscopy has been extensively used as a tool to characterize the structure and thickness of MoS 2 films. Recent works on MoS 2 -metal interfaces have shown that Raman spectra are significantly affected by the interaction with metals. However, a complete understanding of how such interaction modifies the MoS 2 vibrational properties is still lacking. Studying this subject with both experimental and theoretical methods will provide fundamental insight into the interface physics of MoS 2 -metal systems, which is crucial for the fabrication of metal contacts and for the development of metal-assisted synthesis methods. This review summarizes the main results concerning Raman spectroscopy studies of heterosystems between MoS 2 and transition metals, providing both a basis and directions for future research. [ABSTRACT FROM AUTHOR]

Published
2023
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25. Driving Organic Nanocrystals Dissolution Through Electrochemistry

Author

Bussetti, Gianlorenzo, primary, Filoni, Claudia, additional, Li Bassi, Andrea, additional, Bossi, Alberto, additional, Campione, Marcello, additional, Orbelli Biroli, Alessio, additional, Castiglioni, Chiara, additional, Trabattoni, Silvia, additional, De Rosa, Stefania, additional, Tortora, Luca, additional, Ciccacci, Franco, additional, and Duò, Lamberto, additional

Published
2021
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26. Pulsed laser deposition of single-layer MoS2 on Au(111): from nanosized crystals to large-area films† †Electronic supplementary information (ESI) available. See DOI: 10.1039/c8na00126j

Author

Tumino, Francesco, Casari, Carlo S., Passoni, Matteo, Russo, Valeria, and Li Bassi, Andrea

Subjects
Chemistry
Abstract

Molybdenum disulphide (MoS2) is a promising material for heterogeneous catalysis and novel 2D optoelectronic devices. In this work, single-layer MoS2 is synthesized on Au(111) by pulsed laser deposition, showing the potentialities of this technique in the synthesis of high-quality 2D materials films., Molybdenum disulphide (MoS2) is a promising material for heterogeneous catalysis and novel two-dimensional (2D) optoelectronic devices. In this work, we synthesized single-layer (SL) MoS2 structures on Au(111) by pulsed laser deposition (PLD) under ultra-high vacuum (UHV) conditions. By controlling the PLD process, we were able to tune the sample morphology from low-coverage SL nanocrystals to large-area SL films uniformly wetting the whole substrate surface. We investigated the obtained MoS2 structures at the nanometer and atomic scales by means of in situ scanning tunneling microscopy/spectroscopy (STM/STS) measurements, to study the interaction between SL MoS2 and Au(111)—which for example influences MoS2 lattice orientation—the structure of point defects and the formation of in-plane MoS2/Au heterojunctions. Raman spectroscopy, performed ex situ on large-area SL MoS2, revealed significant modifications of the in-plane E12g and out-of-plane A1g vibrational modes, possibly related to strain and doping effects. Charge transfer between SL MoS2 and Au is also likely responsible for the total suppression of excitonic emission, observed by photoluminescence (PL) spectroscopy.

Published
2018

27. Toward novel stretchable electronics with nanostructured metallic glass films

Author

Ghidelli, M., Idrissi, H., Orekhov, A., Raskin, Jean-Pierre, Park, J.-U., Li Bassi, Andrea, Pardoen, Thomas, UCL - SST/ICTM/ELEN - Pôle en ingénierie électrique, and UCL - SST/IMMC/IMAP - Materials and process engineering

Abstract

Thin film metallic glasses (TFMGs) are emerging materials characterized by outstanding combination of mechanical/electrical properties involving a yield strength close to the theoretical limit, large ductility (> 10%) [1] and metallic-like conductivity [2]. Nevertheless, the synthesis of advanced TFMGs with engineered microstructure and the understanding of their mechanical/electrical properties is barely tackled, requiring the development of novel synthesis strategies and cutting-edge techniques for submicrometer scale characterization.

Published
2021

30. Optical and electronic properties of transparent conducting Ta:TiO2 thin and ultra-thin films: the effect of doping and thickness

Author

Bricchi, Beatrice R., primary, Sygletou, Maria, additional, Ornago, Luca, additional, Terraneo, Giancarlo, additional, Bisio, Francesco, additional, Mancarella, Cristina, additional, Stasi, Lorenzo, additional, Rusconi, Francesco, additional, Mogni, Erika, additional, Ghidelli, Matteo, additional, Biagioni, Paolo, additional, and Li Bassi, Andrea, additional

Published
2021
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34. Reactive Dissolution of Organic Nanocrystals at Controlled pH

Author

Filoni, Claudia, primary, Duò, Lamberto, additional, Ciccacci, Franco, additional, Li Bassi, Andrea, additional, Bossi, Alberto, additional, Campione, Marcello, additional, Capitani, Giancarlo, additional, Denti, Ilaria, additional, Tommasini, Matteo, additional, Castiglioni, Chiara, additional, De Rosa, Stefania, additional, Tortora, Luca, additional, and Bussetti, Gianlorenzo, additional

Published
2020
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37. Linear Carbon: From 1D Carbyne to 2D Hybrid sp-sp2 Nanostructures Beyond Graphene

Author

Milani, Alberto, LI BASSI, Andrea, Russo, Valeria, Tommasini, MATTEO MARIA SAVERIO, and Casari, Carlo S.

Subjects
cumulenes, Raman spectroscopy, graphyne, first-principles simulations, carbon allotropes, Linear carbon chains, polyynes, cumulenes, graphyne, graphdiyne, Raman spectroscopy, first-principles simulations, carbon allotropes, polyynes, Linear carbon chains, graphdiyne
Published
2019

40. Integrated Au/TiO2 Nanostructured Photoanodes for Photoelectrochemical Organics Degradation

Author

Matarrese, Roberto, primary, Mascia, Michele, additional, Vacca, Annalisa, additional, Mais, Laura, additional, Usai, Elisabetta, additional, Ghidelli, Matteo, additional, Mascaretti, Luca, additional, Bricchi, Beatrice, additional, Russo, Valeria, additional, Casari, Carlo, additional, Li Bassi, Andrea, additional, Nova, Isabella, additional, and Palmas, Simonetta, additional

Published
2019
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42. Scanning tunneling microscopy and Raman spectroscopy of polymeric sp–sp2 carbon atomic wires synthesized on the Au(111) surface

Author

Rabia, Andi, primary, Tumino, Francesco, additional, Milani, Alberto, additional, Russo, Valeria, additional, Li Bassi, Andrea, additional, Achilli, Simona, additional, Fratesi, Guido, additional, Onida, Giovanni, additional, Manini, Nicola, additional, Sun, Qiang, additional, Xu, Wei, additional, and Casari, Carlo S., additional

Published
2019
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43. Hydrophilic Character of Single-Layer MoS2Grown on Ag(111)

Author

Tumino, Francesco, Grazianetti, Carlo, Martella, Christian, Ruggeri, Marina, Russo, Valeria, Li Bassi, Andrea, Molle, Alessandro, and Casari, Carlo S.

Abstract

The study of MoS2/metal interfaces is crucial for engineering efficient semiconductor–metal contacts in 2D MoS2-based devices. Here we investigate a MoS2/Ag heterostructure fabricated by growing a single MoS2layer on Ag(111) by pulsed laser deposition under ultrahigh vacuum (UHV) conditions. The surface structure is observed in situ by scanning tunneling microscopy, revealing the hexagonal moiré pattern characteristic of the clean MoS2/Ag(111) interface. Ex situ Raman spectroscopy reveals an anomalous behavior of vibrational modes, induced by the strong MoS2–Ag interaction. After few-hours exposure to ambient conditions the Raman response significantly changes and the formation of molybdenum oxysulfides is revealed by X-ray photoelectron spectroscopy. These effects are due to the interplay with water vapor and can be reversed by a moderate UHV annealing. A polymeric (PMMA) capping is demonstrated to hinder water-induced modifications, preserving the original interface quality for months.

Published
2021
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44. Hyperbranched Quasi-1D Nanostructures for Solid-State Dye-Sensitized Solar Cells

Author

Passoni, Luca, Ghods, Farbod, Docampo, Pablo, Abrusci, Agnese, Martí-Rujas, Javier, Ghidelli, Matteo, Divitini, Giorgio, Ducati, Caterina, Binda, Maddalena, Guarnera, Simone, Li Bassi, Andrea, Casari, Carlo Spartaco, Snaith, Henry J., Petrozza, Annamaria, and Di Fonzo, Fabio

Abstract

In this work we demonstrate hyperbranched nanostructures, grown by pulsed laser deposition, composed of one-dimensional anatase single crystals assembled in arrays of high aspect ratio hierarchical mesostructures. The proposed growth mechanism relies on a two-step process: self-assembly from the gas phase of amorphous TiO2clusters in a forest of tree-shaped hierarchical mesostructures with high aspect ratio; oriented crystallization of the branches upon thermal treatment. Structural and morphological characteristics can be optimized to achieve both high specific surface area for optimal dye uptake and broadband light scattering thanks to the microscopic feature size. Solid-state dye sensitized solar cells fabricated with arrays of hyperbranched TiO2nanostructures on FTO-glass sensitized with D102 dye showed a significant 66% increase in efficiency with respect to a reference mesoporous photoanode and reached a maximum efficiency of 3.96% (among the highest reported for this system). This result was achieved mainly thanks to an increase in photogenerated current directly resulting from improved light harvesting efficiency of the hierarchical photoanode. The proposed photoanode overcomes typical limitations of 1D TiO2nanostructures applied to ss-DSC and emerges as a promising foundation for next-generation high-efficiency solid-state devices comprosed of dyes, polymers, or quantum dots as sensitizers.

Published
2024
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