Tilde De caro

Tilde De caro
Italian National Research Council | CNR · Institute of Nanostructured Materials ISMN

PhD

About

83
Publications
23,901
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,528
Citations

Publications

Publications (83)
Article
Full-text available
The best strategy to tackle complexity when analyzing corrosion in iron artefacts is to combine different analytical methods. Traditional techniques provide effective means to identify the chemistry and mineralogy of corrosion products. Nevertheless, a further step is necessary to upgrade the understanding of the corrosion evolution in three dimens...
Article
Copper alloys objects can deteriorate their conservation state through irreversible corrosion. Since in the cultural heritage field every artefact is unique and any loss irreplaceable, solutions for conservation are needed. Hence, there is the necessity to stop the corrosion process with a suitable cleaning and conservation process to avoid further...
Article
Archaeological bronzes (Cu-Sn alloys) might be different in composition and these variabilities lead to a different interaction with the environment and, if they were buried, with several chemical elements present in soils. Generally, the results is the presence of complex corrosion products layers on the Cu-based artefacts which might be protectiv...
Article
Full-text available
Materials possessing long-term antibacterial behavior and high cytotoxicity are of extreme interest in several applications, from biomedical devices to food packaging. Furthermore, for the safeguard of the human health and the environment, it is also stringent keeping in mind the need to gather good functional performances with the development of e...
Article
Full-text available
The mining areas of the Middle Atlas, already inhabited in the Neolithic period, have been under the influences of different cultures, firstly Phoenician, then Punic or Ibero-Punic, Berber, Roman and finally Islamic. The impact of external cultures on the evolution and development of ancient metallurgy in the north-central Atlas region and the Sout...
Article
Full-text available
p>In this paper, a study of the corrosion products formed on archaeological bronze artefacts excavated in Tharros (Sardinia, Italy) is presented. The investigation was carried out by means of the combination of different analytical techniques, including optical microscopy, micro-Raman spectroscopy (µ-RS), scanning electron microscopy coupled with e...
Article
Packaging is as important as the product itself because it is a crucial marketing and communication tool for business. Oxidized nanocellulose (ONC), extracted from agriculture residues of bagasse raw material using ecofriendly ammonium persulfate hydrolysis method, is used as support/reducing agent for the generation of silver nanoparticles (AgNPs)...
Article
Full-text available
Irradiation of diamond with femtosecond (fs) laser pulses in ultra-high vacuum (UHV) conditions results in the formation of surface periodic nanostructures able to strongly interact with visible and infrared light. As a result, native transparent diamond turns into a completely different material, namely “black” diamond, with outstanding absorptanc...
Article
Full-text available
Herein we present facile and green two-steps method for the fabrication of silver-carboxylated nanocellulose (Ag-ONCs) nanocomposite. Respecting the Circular Economy principle, the ONCs are prepared starting from the treatment of agriculture bagasse waste with ammonium persulfate—APS. This method permits to obtain ONCs fibers with rod or whisker sh...
Article
Full-text available
Different amounts of a stable aqueous TiO2 hydrosol were used to fabricate paper sheets having photocatalytic activity. The TiO2 hydrosol was prepared in aqueous medium using titanium butoxide as precursor and acetic acid as catalyst for the hydrolysis of titanium butoxide. An aging process at room temperature and atmospheric pressure was finally a...
Article
Full-text available
Increasing awareness of environmental concerns has strongly pushed the scientific community towards the search for new solutions for efficient removal of oils and organic solvents from water. Here, we report the preparation of multifunctional TiO2-coated melamine-formaldehyde (MF) sponges as absorbent material for oils and organic solvents in water...
Article
A series of chemically treated graphene oxide (GO) samples, destined for the preparation of several composite materials, was studied by X‐ray photoelectron spectroscopy (XPS). From their comparison, the 3‐mercaptopropyl trimethoxysilane was identified as the most effective reducing agent among the used procedures. The influence of ultrahigh vacuum...
Article
A modified one step and cost-effective chemical green route has been used to synthesize oleate-capped TiO2 anatase nanocrystals (NCs) doped with different amounts of europium, with high yields and without high-temperature post-calcination processes. Europium doping endowed TiO2 NCs with an intense red luminescence associated with the ⁵D0 → ⁷F2 tran...
Article
Since ancient times, Sardinia has been characterized by a strong mining connotation and its enormous mineralogical potential has attracted several Mediterranean people including Phoenician-Punic (VIII–IV Century BC) and the Roman Empire (V Century AC). This strong metallurgical activity is testified by the presence of slags, tuyeres and ceramic art...
Article
Diamond like carbon (DLC) films are becoming materials of choice for mechanical and corrosion protection barrier films due to their excellent properties of low-friction and chemical inertness. As DLC functional properties are strictly dependent on process parameters, different DLC coatings have been deposited onto silicon substrates by Plasma Enhan...
Article
“Bronze disease” is a very dangerous cyclic copper corrosion phenomenon which commonly develops after the discovery of the artefact. Therefore, in the cultural heritage field every object is inimitable and whatever loss is irreplaceable, causing a protective coating to be indispensable. Herein we studied the efficiency of a transparent, protective...
Article
Mixed Cu–Ag alloys with different compositions have been produced and subjected to an accelerated sulphidation process which causes the development of a mixed sulphide-rich corroded film on their surface. It was called tarnishing, that is, the formation of a blue-brownish patina when Cu–Ag alloys are exposed in a sulfur-containing atmosphere. The s...
Article
Full-text available
Bronzes are largely used in various domains such as battery connectors, archaeological artefacts and urban statues, suffering from corrosion process leading to the formation of corrosion products. A protection treatment could be used to insulate them from this environment. In this way we contribute to the protection of bronze in the environment by...
Article
Full-text available
In this article we present the morphological and magnetic characterization of ferrofluid-impregnated biomimetic scaffolds made of hydroxyapatite and collagen used for bone reconstruction. We describe an innovative and simple impregnation process by which the ferrofluid is firmly adsorbed onto the hydroxyapatite/collagen scaffolds. The process confe...
Article
The role played by environmental species affecting the long-term stability of archaeological Ag-based artefacts during museum exhibition or storage has been studied by means of the combined use of selected area X-ray photoelectron spectroscopy, X-ray diffraction, optical microscopy and scanning electron microscopy + energy dispersive spectrometry....
Article
Full-text available
Conservation and valorization of cultural heritage is a fundamental element and an essential mission of the Mediterranean countries where most of the ancient and fascinating witnesses of human art and creativity are conserved. A large component of this cultural heritage consists of material cultural assets that are often exposed to harmful long-ter...
Article
The precious metallic artefacts are particularly interesting from a historical, artistic and economical point of view because they were used as jewels, amulets or artistic items and also for currency, medium of exchange and form of saving. By means of the combined use of XPS, X-ray diffraction, SEM + energy dispersive spectrometry and optical micro...
Article
Full-text available
Plasma-enhanced chemical vapour deposition (PECVD) is an environmentally friendly process used to deposit a variety of nano-structured coatings for the protection or the surface modification of metallic artefacts like the SiO2-like films that have been successfully tested on ancient silver, bronze and iron artefacts as barriers against aggressive a...
Article
Full-text available
A simple, environmentally benign and energy efficient process for fabricating single faced superhydrophilic/hydrophobic cotton fabrics by controlling surface texture and chemistry at the nano/microscale is reported here. Stable ultra-hydrophobic surfaces with advancing and receding water droplet contact angles in excess of 146° as well as extreme s...
Article
Full-text available
The spectroscopic properties and liquid structure of pure tri-n-butyl phosphate (TBP) and FeCl3/TBP solutions have been investigated by Uv-Vis and Raman spectroscopies, X-ray diffraction and conductometry. Uv-Vis and Raman spectra, supported by conductometric measurements, consistently indicate that the solubilized salt is present mostly as TBP n [...
Article
A multi-analytical approach combining Optical Microscopy (OM), Backscattered Variable Pressure Scanning Electron Microscopy + Energy Dispersive X-ray Spectroscopy (VP-BSEM + EDS), Powder X-ray Diffractometry (PXRD), Raman Spectroscopy and Microbiological techniques has been applied to characterize decay products and processes occurring at the surfa...
Article
Full-text available
A large number of pyrometallurgical materials such as tuyeres, slags and refractory tools likely associated with metal extraction processes have been found at Tharros (north-western Sardinia, Italy) during archaeological excavations stratigraphically related to the Phoenician–Punic period (VI–III centuries BC). Micro-chemical, micro-structural and...
Article
Full-text available
Different pyrometallurgical materials such as slags, refractory materials and thermally treated lead ores likely related to smelting and extractive processes and chronologically related to Punic and Roman periods (IV–III BC) have been found at Bocche di Sciria and Conca e Mosu in the Montevecchio mine basin (south western Sardinia, Italy), where ar...
Article
Full-text available
The Samnite bronze belts and the chest disk cuirasses (VIII–IV BC) are the distinctive defensive weapons of the Samnite warriors having likely also a symbolic relevance. These artefacts were mainly found during the archaeological excavations of warriors’ graves from ancient Abruzzo (central Italy). Their chemical composition, metallurgical features...
Article
Full-text available
Within the framework of the EFESTUS project funded by the European Commission a large number of Cu-based archaeological artefacts from the Mediterranean basin have been studied to investigate their chemical composition, metallurgical features and corrosion products nature (i.e. the patina). By means of the combined use of X-ray photoelectron spectr...
Article
Full-text available
Bronze weapons (VII cen BC) found during the archaeological excavation of the Ayanis fortress (lake Van, eastern Anatolia, Turkey) are investigated in order to determine their chemical composition and metallurgical features as well as to identify the micro-chemical and micro-structural nature of the corrosion products grown during long-term burial....
Article
Since ancient times, precious metallic artefacts have gained a remarkable interest from a historical, artistic and economical point of view. They were used as jewels or artistic items but also for currency, medium of exchange and form of saving, and in many cases were manufactured with a high level of technological competence. Several Roman and Pho...
Article
Full-text available
Archaeological bronze artefacts are covered with corrosion products, that is, the patinas, whose nature depends on different degradation processes occurring during long‐term burial. As a consequence of the corrosion phenomenon, surfaces of archaeological metal objects are composed of a complex structure. By means of the combined use of different an...
Article
The present work reports the results of the SEM–energy dispersive spectrometry, X‐ray diffraction (XRD), XPS and optical microscopy (OM) investigations performed to identify the corrosion products nature, i.e. the patina, grown on bronze common use artefacts found during excavations carried out at Tharros (on the west coast of Sardinia, Italy). The...
Article
Brittle Carthaginian and Roman silver artefacts, such as bracelets, coins, small jewels and cups, were found in extremely brittle condition during archaeological excavations in different Italian archaeological sites. Some of these silver objects are accidentally easily broken with little applied force and with only small deformation. In order to id...
Article
Full-text available
Benzotriazole (BTA) is an inhibitor molecule, commonly used to protect copper and copper‐based archaeological artefacts from degradation processes such as the ‘bronze disease’. The aim of the present work was to study in details the inhibition mechanism of the BTA molecule on pure copper and copper–tin alloy (called CNR 128) by the surface‐sensitiv...
Article
Full-text available
In this work, colloidal gold nanoparticles (AuNPs) stabilized into a chitosan matrix were prepared using a green route. The synthesis was carried out by reducing Au(III) to Au(0) in an aqueous solution of chitosan and different organic acids (i.e., acetic, malonic, or oxalic acid). We have demonstrated that by varying the nature of the acid it is p...
Article
Full-text available
The synthesis of randomly distributed sp2-BN nanoplates embedded in a steel matrix was achieved by using boron doped AISI 316 stainless steel as substrates and a dissociated anhydrous NH3 atmosphere at 1070 °C as the nitrogen source. The chemical and morphological nature of the BN nanoplates has been studied by means of the combined use of XPS, FES...
Article
Properly functionalized amphiphilic cyclodextrins (CDs) can act as capping agents for gold colloids in solution (Mazzaglia, A.; et al. J. Phys. Chem. C 2008, 112, 6764). In the present work, we report a study on a hybrid gold nanoparticles/amphiphilic CD supramolecular system assembled onto a surface by both field emission scanning electron microsc...
Article
Zirconia-based thermal barrier coatings (TBCs) of nominal chemical composition 8 wt.% Y2O3–ZrO2 and 25.5 wt.% CeO2–2.5 Y2O3–ZrO2 were prepared by atmospheric plasma spray and low-pressure plasma spray by selecting different deposition parameters. The surface chemical composition has been investigated by X-ray photoelectron spectroscopy in order to...
Article
Full-text available
The micro-chemical and micro-structural nature of inorganic thick encrustations, deposited during long-term archaeological burial on Roman, Greek and medieval ceramic artefacts and obscuring significant decoration details, were investigated by means of scanning electron microscopy combined with energy-dispersive spectrometry, optical microscopy, X-...
Article
Precious metal artefacts are characterized by a wide compositional nature and have been produced via different complex manufacturing techniques that have greatly influenced their chemical and metallurgical stability. Furthermore, the Ag or Au based alloys can be characterized by different amount of impurities coming from the extractive processes, w...
Article
Full-text available
Several common-use artifacts (coins, faience, cult objects, etc.) coming from two excavations sites near Rio de Janeiro, two sugar farms Historico do Rochedo and Cruzeiro, have been the subject of this investigation, which aimed to integrate physico-chemical characterizations with the identification of degradation mechanisms, and the proposal of in...
Article
In the framework of the PROMET project (European Commission contract No. 509126) aimed to develop new analytical techniques and materials for monitoring and protecting metal artefacts and monuments from the Mediterranean region, the corrosion products grown on silver Roman coins during archaeological burial is studied by means of scanning electron...
Article
In the framework of the EFESTUS project (funded by the European Commission, contract No. ICA3-CT-2002-10030) the corrosion products of a large number of archaeological bronze artefacts are investigated by means of the combined use of scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X-ray diffraction (XRD) and optical micros...
Article
Non-destructive testing methods are very important tools for conservators and art historians to obtain valuable information about works of art without causing any or even local damage to them. Two successful case studies showing the noticeable potentialities of two analytical portable instruments employed in the characterisation of tangible cultura...
Article
Full-text available
The surface microchemical structure of high tin leaded bronze Roman mirrors has been studied by means of scanning electron microscopy combined with energy dispersive spectrometry (SEM-EDS), X-ray diffraction (XRD) and optical microscopy (OM) techniques. The results allowed understanding of the origin of their high chemical stability and silvery-lus...
Article
A multi-analytical approach was used to investigate Medieval and post-medieval (thirteenth-seventeenth century) ceramic artefacts from archaeological excavations at Caltagirone (Sicily, Italy). The chemical, structural and micro-morphological characterizations were carried out by the combined use of surface-sensitive techniques, such as X-ray photo...
Article
A large number of bronze artefacts found during archaeological excavations carried out in Italy in different contexts have been studied. Their chemical composition and metallurgical features have been determined by the combined use of different analytical surface and bulk techniques, such as optical microscopy (OM), scanning electron microscopy wit...
Article
Full-text available
A large number of Cu-based archaeological artefacts from the Mediterranean basin have been selected for investigation of their chemical composition, metallurgical features and corrosion products (i.e. the patina). The guidelines for the selection of the Cu-based artefacts have taken into account the representativeness of the Mediterranean archaeolo...