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View article: First-Principles Investigation of the Optical Properties of Eumelanin Protomolecules
First-Principles Investigation of the Optical Properties of Eumelanin Protomolecules Open
Using first-principles calculations, we investigate the absorption spectra (in the near-infrared, visible, and first UV range) of the two most probable eumelanin tetrameric molecules exhibiting either a linear open-chain or a cyclic porphy…
View article: The interplay of chemical structure, physical properties, and structural design as a tool to modulate the properties of melanins within mesopores
The interplay of chemical structure, physical properties, and structural design as a tool to modulate the properties of melanins within mesopores Open
The design of modern devices that can fulfil the requirements for sustainability and renewable energy applications calls for both new materials and a better understanding of the mixing of existing materials. Among those, surely organic–ino…
View article: Polaron Plasma in Equilibrium with Bright Excitons in 2D and 3D Hybrid Perovskites
Polaron Plasma in Equilibrium with Bright Excitons in 2D and 3D Hybrid Perovskites Open
Rapid advances in perovskite photovoltaics have produced efficient solar cells, with stability and duration improving thanks to variations in materials composition, including the use of layered 2D perovskites. A major reason for the succes…
View article: Mesopore Formation and Silicon Surface Nanostructuration by Metal-Assisted Chemical Etching With Silver Nanoparticles
Mesopore Formation and Silicon Surface Nanostructuration by Metal-Assisted Chemical Etching With Silver Nanoparticles Open
This article presents a study on Metal-Assisted Chemical Etching (MACE) of silicon in HF-H2O2 using silver nanoparticles as catalysts. Our aim is a better understanding of the process to elaborate new 3D submicrometric surface structures u…
View article: Eumelanin Adsorption on Silicon: Optical Properties of Si(001)-Adsorbed Eumelanin Tetrameric Protomolecules
Eumelanin Adsorption on Silicon: Optical Properties of Si(001)-Adsorbed Eumelanin Tetrameric Protomolecules Open
We predict the optical properties (in particular optical absorbance and reflectance anisotropy spectra (RAS)) of the silicon(001) surface organically functionalized by the adsorption of chosen tetrameric eumelanin protomolecules. These Si(…
View article: Electrochemical Nanolithography on Silicon: An Easy and Scalable Method to Control Pore Formation at the Nanoscale
Electrochemical Nanolithography on Silicon: An Easy and Scalable Method to Control Pore Formation at the Nanoscale Open
Lithography on a sub-100 nm scale is beyond the diffraction limits of standard optical lithography but is nonetheless a key step in many modern technological applications. At this length scale, there are several possible approaches that re…
View article: Chemical Imaging of Buried Interfaces in Organic–Inorganic Devices Using Focused Ion Beam-Time-of-Flight-Secondary-Ion Mass Spectrometry
Chemical Imaging of Buried Interfaces in Organic–Inorganic Devices Using Focused Ion Beam-Time-of-Flight-Secondary-Ion Mass Spectrometry Open
Organic-inorganic hybrid materials enable the design and fabrication of new materials with enhanced properties. The interface between the organic and inorganic materials is often critical to the device's performance; therefore, chemical ch…
View article: Argon cluster cleaning of Ga <sup>+</sup> FIB‐milled sections of organic and hybrid materials
Argon cluster cleaning of Ga <sup>+</sup> FIB‐milled sections of organic and hybrid materials Open
Secondary ion mass spectrometry studies have been made of the removal of the degraded layer formed on polymeric materials when cleaning focused ion beam (FIB)‐sectioned samples comprising both organic and inorganic materials with a 30‐keV …
View article: Activity report of the Italian CRG beamline at the European Synchrotron Radiation Facility (ESRF) - Year 2017
Activity report of the Italian CRG beamline at the European Synchrotron Radiation Facility (ESRF) - Year 2017 Open
This document resumes the activity of the Italian CRG beamline at ESRF (LISA project) during year 2017. The features of the newly installed instrumentation are presented as well as statistic data on the beamline, hi-ghlight experiments and…
View article: Deciphering Molecular Mechanisms of Interface Buildup and Stability in Porous Si/Eumelanin Hybrids
Deciphering Molecular Mechanisms of Interface Buildup and Stability in Porous Si/Eumelanin Hybrids Open
Porous Si/eumelanin hybrids are a novel class of organic–inorganic hybrid materials that hold considerable promise for photovoltaic applications. Current progress toward device setup is, however, hindered by photocurrent stability issues, …
View article: Optical and Electronic Properties of Monomers of Eumelanin: A DFT and TD-DFT Computational Study
Optical and Electronic Properties of Monomers of Eumelanin: A DFT and TD-DFT Computational Study Open
We report a systematic investigation on the electronic and optical properties of four monomers which are elementary constituents of some of the protomolecules of eumelanin. Eumelanin is the most important form of melanin which is one of th…