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Raffaella Buonsanti

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Related publications (79)

Tunable Metal Oxide Shell as a Spacer to Study Energy Transfer in Semiconductor Nanocrystals

Seryio Saris, Raffaella Buonsanti, Anna Loiudice

Colloidal semiconductor nanocrystals (NCs) are promising components in various optoelectronic and photocatalytic devices; however, the mechanism of energy transport in these materials remains to be further understood. Here, we investigate the distance depe ...

2020

Shaping non-noble metal nanocrystals via colloidal chemistry

Raffaella Buonsanti, Valeria Mantella, Laia Castilla Amorós

Non-noble metal nanocrystals with well-defined shapes have been attracting increasingly more attention in the last decade as potential alternatives to noble metals, by virtue of their earth abundance combined with intriguing physical and chemical propertie ...

2020

Metal-ligand bond strength determines the fate of organic ligands on the catalyst surface during the electrochemical CO(2)reduction reaction

Mounir Driss Mensi, Raffaella Buonsanti, Anna Loiudice, Pranit Srinivas Iyengar, James Richard Pankhurst

Colloidally synthesised nanocrystals (NCs) are increasingly utilised as catalysts to drive both thermal and electrocatalytic reactions. Their well-defined size and shape, controlled by organic ligands, are ideal to identify the parameters relevant to the a ...

2020

Nanocrystals as Precursors in Solid-State Reactions for Size- and Shape-Controlled Polyelemental Nanomaterials

Emad Oveisi, Chethana Janardhana Gadiyar, Raffaella Buonsanti, Anna Loiudice, Valeria Mantella, Pranit Srinivas Iyengar, Laia Castilla Amorós, Dragos-Constantin Stoian

Solid-state reactions between micrometer-size powders are among the oldest, simplest, and still widely used methods for the fabrication of inorganic solids. These reactions are intrinsically slow because, although the precursorsare "well mixed" at the macr ...

AMER CHEMICAL SOC2020

Suitability of Cu-substituted beta-Mn2V2O7 and Mn-substituted beta-Cu2V2O7 for photocatalytic water-splitting

Raffaella Buonsanti, Michal Stanislaw Strach

The pyrovanadates beta -Mn2V2O7 and beta -Cu2V2O7 were previously investigated as photoanode materials for water splitting. Neither of them, however, was found to be sufficiently active. In this work, we predict the properties of these two structurally sim ...

AMER INST PHYSICS2020

Ligand-mediated formation of Cu/metal oxide hybrid nanocrystals with tunable number of interfaces

Raffaella Buonsanti, Seyedehbehnaz Varandili, Jan Vávra, James Richard Pankhurst, Dragos-Constantin Stoian

Combining domains of different chemical nature within the same hybrid material through the formation of heterojunctions provides the opportunity to exploit the properties of each individual component within the same nano-object; furthermore, new synergisti ...

2020

Colloidal Synthesis of Cu-M-S (M = V, Cr, Mn) Nanocrystals by Tuning the Copper Precursor Reactivity

Raffaella Buonsanti, Seyedehbehnaz Varandili, Valeria Mantella, James Richard Pankhurst

New ternary and higher order inorganic materials are needed for a large variety of applications, yet their synthesis still represents a chemistry challenge. Herein, we focus on the synthesis of Cu-M-S nanocrystals (where M = V, Cr, Mn) via a wet-chemistry ...

2020

Long-Range Exciton Diffusion in Two-Dimensional Assemblies of Cesium Lead Bromide Perovskite Nanocrystals

Raffaella Buonsanti, Anna Loiudice

Forster resonant energy transfer (FRET)-mediated exciton diffusion through artificial nanoscale building block assemblies could be used as an optoelectronic design element to transport energy. However, so far, nanocrystal (NC) systems supported only diffus ...

AMER CHEMICAL SOC2020

Polymer Lamellae as Reaction Intermediates in the Formation of Copper Nanospheres as Evidenced by In Situ X-ray Studies

Chethana Janardhana Gadiyar, Kilian Frank, Raffaella Buonsanti, Valeria Mantella, Michal Stanislaw Strach, James Richard Pankhurst, Dragos-Constantin Stoian

The classical nucleation theory (CNT) is the most common theoretical framework used to explain particle formation. However, nucleation is a complex process with reaction pathways which are often not covered by the CNT. Herein, we study the formation mechan ...

Wiley-VCH Verlag GmbH2020

Stability and Degradation Mechanisms of Copper-Based Catalysts for Electrochemical CO2 Reduction

Raffaella Buonsanti, Jan Vávra

To date, copper is the only monometallic catalyst that can electrochemically reduce CO2 into high value and energy-dense products, such as hydrocarbons and alcohols. In recent years, great efforts have been directed towards understanding how its nanoscale ...

Wiley-VCH Verlag GmbH2020

Exploring the Chemical Reactivity of Gallium Liquid Metal Nanoparticles in Galvanic Replacement

Raffaella Buonsanti, Seyedehbehnaz Varandili, Laia Castilla Amorós, James Richard Pankhurst, Dragos-Constantin Stoian

Micron/nanosized particles of liquid metals possess intriguing properties and are gaining popularity for applications in various research fields. Nevertheless, the knowledge of their chemistry is still very limited compared to that of other classes of mate ...

2020

Atomic Control in Multicomponent Nanomaterials: when Colloidal Chemistry Meets Atomic Layer Deposition

Raffaella Buonsanti, Anna Loiudice, Ona Segura Lecina

In the past decades, atomically controlled multicomponent nanomaterials have served as platforms to advance the understanding of scientific phenomena along with providing practical solutions for various applications. Colloidal chemistry and atomic layer de ...

2020

Optimizing the Atomic Layer Deposition of Alumina on Perovskite Nanocrystal Films by Using O-2 As a Molecular Probe

Seryio Saris, Raffaella Buonsanti, Anna Loiudice, Sanduni Thiyaga Pathiraja Mudalige Dona, Valerie Anne Niemann

Encapsulation methods have shown to be effective in imparting improved stability to metal-halide perovskite nanocrystals (NCs). Atomic layer deposition (ALD) of metal oxides is one of the promising approaches for such encapsulation, yet better control on t ...

WILEY-V C H VERLAG GMBH2020

Dual-Facet Mechanism in Copper Nanocubes for Electrochemical CO2 Reduction into Ethylene

Raffaella Buonsanti, Jianfeng Huang, Giulia Mangione

The product selectivity in the electrochemical reduction of carbon dioxide depends on the structure of the copper electrode. Cube-shaped copper catalysts, enclosed by {100} terraces, {110} edges, and {111} corners, exhibit a size-dependent enhanced only se ...

2019

Exploring Energy Transfer in a Metal/Perovskite Nanocrystal Antenna to Drive Photocatalysis

Mounir Driss Mensi, Seryio Saris, Raffaella Buonsanti, Anna Loiudice

The use of all-inorganic perovskite nanocrystals (PeNCs) in photocatalytic systems has been limited because of their instability in polar solvents. Encapsulation of PeNCs in inorganic or polymeric matrices has been shown to be effective in overcoming such ...

2019

Molecular tunability of surface-functionalized metal nanocrystals for selective electrochemical CO2 reduction

Mounir Driss Mensi, Raffaella Buonsanti, Yannick Thomas Guntern, James Richard Pankhurst

Organic ligands are used in homogeneous catalysis to tune the metal center reactivity; in contrast, clean surfaces are usually preferred in heterogeneous catalysis. Herein, we demonstrate the potential of a molecular chemistry approach to develop efficient ...

2019

Insights into Reaction Intermediates to Predict Synthetic Pathways for Shape-Controlled Metal Nanocrystals

Anne-Clémence Corminboeuf, Raffaella Buonsanti, Anna Loiudice, Valeria Mantella, Pranit Srinivas Iyengar, Michal Stanislaw Strach, James Richard Pankhurst, Shubhajit Das

Understanding nucleation phenomena is crucial across all branches of physical and natural sciences. Colloidal nanocrystals are among the most versatile and tunable synthetic nanomaterials. While huge steps have been made in their synthetic development, syn ...

2019

Synthesis and Size-Dependent Optical Properties of Intermediate Band Gap Cu3VS4 Nanocrystals

Ulrich Aschauer, Seryio Saris, Raffaella Buonsanti, Anna Loiudice, Valeria Mantella

Intermediate band gap semiconductors are an underex-plored class of materials with unique optical properties of interest for photovoltaic and optoelectronic applications. Herein, we synthesize highly crystalline cubic Cu3VS4 nanocrystals with tunable edge ...

2019

Synthesis of Cu/CeO2-x Nanocrystalline Heterodimers with Interfacial Active Sites To Promote CO2 Electroreduction

Mounir Driss Mensi, Emad Oveisi, Chethana Janardhana Gadiyar, Raffaella Buonsanti, Seyedehbehnaz Varandili, Jianfeng Huang, Michal Stanislaw Strach, Gian Luca De Gregorio, Jan Vávra

Synergistic effects at metal/metal oxide interfaces often give rise to highly active and selective catalytic motifs. So far, such interactions have been rarely explored to enhance the selectivity in the electrochemical CO2 reduction reaction (CO2RR). Herei ...

2019

Colloidal Nanocrystals as Heterogeneous Catalysts for Electrochemical CO2 Conversions

Raffaella Buonsanti, Jianfeng Huang

In the past decade, atomically engineered nanomaterials with different sizes and exposed facets have been proven to be excellent model systems to advance catalytic studies. Colloidal chemistry is one of the most powerful wet-chemistry techniques to tailor- ...

2019

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