Publications de Valeria Mantella

Copper-Phosphonate Lamella Intermediates Control the Shape of Colloidal Copper Nanocrystals

Raffaella Buonsanti, Valeria Mantella, Jan Vávra, James Richard Pankhurst, Dragos-Constantin Stoian, Petru Pasquale Albertini

Understanding the structure and behavior of intermediates in chemical reactions is key to developing greater control over the reaction outcome. This principle is particularly important in the synthesis of metal nanocrystals (NCs), where the reduction, nucl ...

2022

Colloidal Nanocrystals as Precursors and Intermediates in Solid State Reactions for Multinary Oxide Nanomaterials

Raffaella Buonsanti, Anna Loiudice, Valeria Mantella

Polyelemental compounds with dimensions in the nanosized regime are desirable in a large variety of applications, yet their synthesis remains a general challenge in chemistry. One of the major bottlenecks to obtaining multinary systems is the complexity of ...

2021

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

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

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

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

Colloidal copper-based nanocrystals: synthesis and mechanistic studies

Valeria Mantella

The growing interest in nanotechnology stems from its promise of developing new materials and devices by taking advantage of unique phenomena emerging at the nanoscale. In this size regime, parameters like size and shape strongly impact the physico-chemica ...

EPFL2020

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

Nanocrystal/Metal–Organic Framework Hybrids as Electrocatalytic Platforms for CO2 Conversion

Mounir Driss Mensi, Raffaella Buonsanti, Pascal Alexander Schouwink, Valeria Mantella, Yannick Thomas Guntern, Jan Vávra, James Richard Pankhurst

The tunable chemistry linked to the organic/inorganic components in colloidal nanocrystals (NCs) and metal–organic frameworks (MOFs) offers a rich playground to advance the fundamental understanding of materials design for various applications. Herein, we ...

Wiley-VCH Verlag GmbH2019

Structural Sensitivities in Bimetallic Catalysts for Electrochemical CO2 Reduction Revealed by Ag-Cu Nanodimers

Mounir Driss Mensi, Emad Oveisi, Raffaella Buonsanti, Jianfeng Huang, Valeria Mantella

Understanding the structural and compositional sensitivities of the electrochemical CO2 reduction reaction (CO2RR) is fundamentally important for developing highly efficient and selective electrocatalysts. Here, we use Ag/Cu nanocrystals to uncover the key ...

2019