Enzo Laurenti

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Verified

Enzo verified their affiliation via an institutional email.

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• PhD
• Professor (Associate) at University of Turin

BACKGROUND The volatile composition of Ruché, a red wine produced from a native grape in Piedmont (Italy), was investigated using headspace‐solid phase microextraction (SPME) coupled to gas chromatography–mass spectrometry (GC/MS). The main volatile compounds of the wine were identified and quantified. Chemometric techniques were applied to identif...

The problem of microbial resistance to antibiotics makes it necessary to develop new materials capable of overcoming the resistance to the chemicals currently used. Herein, the antibacterial properties of modified bamboo powder are tested and compared with modified cellulose isolated from soybean hulls. Such biomasses are functionalized in a water...

In recent years, there has been increasing attention focused on various products belonging to the imidazopyridine family; this class of heterocyclic compounds shows unique chemical structure, versatile optical properties, and diverse biological attributes. The broad family of imidazopyridines encompasses different heterocycles, each with its own sp...

Hydroxyapatite, a mineral from the apatite group, is widely distributed in living organisms and largely studied because of its many properties, including the adsorption of many different substances. In this...

The use of hydrogen peroxide (produced in situ or ex situ) as the main agent in oxidative processes of environmental pollutant removal is widely studied. The degradation of water pollutants, such as dyes, pharmaceuticals, cosmetics, petroleum derivatives, and even pathogens, has been successfully obtained by different techniques. This review gives...

Perovskite-type compounds have found application in environmental remediation and in clean energy production, fundamental sectors for sustainable development. A challenge for these materials is the fine-tuning of their chemical composition and their chemical-physical characteristics, for example, microstructure, morphology and ability to form oxyge...

The accumulation of micropollutants in water effluents is calling for effective remediation methods such as the Fenton reaction catalyzed by the tetra-amido macrocyclic ligand-iron complex, yet the identification of the active species in this reaction is debated due to the presence of several reactants. Here we hypothesized that radical species are...

Soybean hulls (SBHs) are one of the main by-products of soybean crushing, usually destined for animal feeding or to become a putrescible waste. In this work, we upgraded the SBHs to materials with antimicrobial properties. After the extraction of soybean peroxidase from SBHs, an enzyme applicable in different technological sectors and naturally pre...

The relevance of hydrogen‐bonding, π‐π stacking and aurophilic interactions in the solid‐state of two new heterobimetallic (AuI−MnII) complexes is analyzed in this manuscript. They are discrete complexes of formulae [Mn(bipy)2(H2O){Au(CN)2}][Au(CN)2] and [Mn(dmbipy)2{Au(CN)2}] ⋅ H2O, (bipy=2,2′‐bipyridine and dmbipy=5,5′‐dimethyl‐2,2′‐bipyridine),...

The complex of iron and tetra-amido macrocyclic ligand (Fe-TAML), or Collin’s reagent, is a promising catalyst to carry out Fenton-like degradation of contaminants. Previously, the ability of Fe-TAML to activate sulfite and metabisulfite (S2O52-, MBS) other than hydrogen peroxide, was reported, which could lead to cheaper, safer, and almost equally...

The effect of the synthesis and processing parameters on the thermocatalytic performance of Ce-doped SrFeO3 inorganic perovskites was investigated to improve the reproducibility and reliability of the synthetic methodology and of the testing procedure. A structural, surface and redox characterization was performed to check the extent of variability...

In recent years, bioremediation has become very attractive for environmental applications, especially enzyme-based treatments, since they offer high catalytic capacity with milder reaction conditions, production of nontoxic compounds, and environmental...

In this study, an in-depth assessment of the peroxymonosulfate (PMS) reactivity towards sulfamethoxazole (SMX) is reported for the first time based on (i) a comparative kinetics of SMX recorded under different sources of light (simulated solar irradiation and UV-C) and in the dark, all under different operational conditions (PMS and SMX dosages, pH...

Photo-Fenton processes activated by biodegradable Fe(III)–EDDS complexes have attracted huge attention from the scientific community, but the operative mechanism of the photo-activation of H 2 O 2 in the presence of Fe(III)–EDDS has not been fully clarified yet. The application of the Fe(III)–EDDS complex in Fenton and photo-Fenton (mainly under UV...

Magnetic Fe-Cu nanocomposites with photocatalytic properties were prepared via the precursor method under different conditions using bio-based substances isolated from urban waste (BBS) as carbon sources. The effects of the amount of organic matter, the target temperature of the pyrolysis treatment (400-800°C), and the replacement of Cu²⁺ with Ni²⁺...

In recent years, different approaches for achieve the removal of Contaminant of Emerging Concerns (CECs) from aqueous matrices were developed. Within this framework, the synthesis of new hybrid materials capable to combine different processes, such as photocatalysis, adsorption and enzyme catalysis, is an important issue. Therefore, to enhance perf...

Vanadium has a good therapeutic potential, as several biological effects, but few side effects, have been demonstrated. Evidence suggests that vanadium compounds could represent a new class of non-platinum, metal antitumor agents. In the present study, we aimed to characterize the antiproliferative activities of fluorescent vanadyl complexes with a...

The current SARS-CoV-2 pandemic causes serious public health, social, and economic issues all over the globe. Surface transmission has been claimed as a possible SARS-CoV-2 infection route, especially in heavy contaminated environmental surfaces, including hospitals and crowded public places. Herein, we studied the deactivation of SARS-CoV-2 on pho...

The enzymatic degradation of organic pollutants is a promising and ecological method for the remediation of industrial effluents. 2,4,6-Trichlorophenol is a major pollutant in many residual waters, and its consumption has been linked to lymphomas, leukemia, and liver cancer. The goal of the present work is to comprehend the enzymatic degradation of...

The enzymatic degradation of organic pollutants is a promising and ecological method for the remediation of industrial effluents. 2,4,6-Trichlorophenol is a major pollutant in many residual waters, and its consumption has been linked to lymphomas, leukemia, and liver cancer. The goal of the present work is to comprehend the enzymatic degradation of...

The Lab4treat experience has been developed to demonstrate the use of magnetic materials in environmental applications. It was projected in the frame of the European project Mat4Treat, and it was tested several times in front of different audiences ranging from school students to the general public in training and/or divulgation events. The experie...

We present a photoactive composite material for water decontamination consisting of non-purified commercial multiwalled carbon nanotubes (CNT(NP)s) supported on an electrospun polymeric mat made of core-sheath polyacrylonitrile-polypyrrole nanofibers. This is the first system that specifically exploits the superior photocatalytic activity of CNT(NP...

Biogenic amines are a group of important organic bases involved in the metabolism of living organisms and present in biological fluids, food or beverages. Their identification and quantification represent relevant issues in the field of bio-analytical and food chemistry. Beyond the traditional detection techniques, other methods have been recently...

Soluble bioorganic substances (SBOs) are soluble macromolecular substances isolated from residual biomasses, featuring physical–chemical properties analogous to natural organic matter present in soils, in particular humic acids. SBO’s structure possesses different functionalities, able to chelate metal ions, as well as absorb light in the ultraviol...

Soybean hulls are one of the by-products of soybean crushing and find application mainly in the animal feed sector. Nevertheless, soybean hulls have been already exploited as source of peroxidase (soybean peroxidase, SBP), an enzyme adopted in a wide range of applications such as bioremediation and wastewater treatment, biocatalysis, diagnostic tes...

Soybean peroxidase is an enzyme extracted from soybean seed hulls. In the presence of hydrogen peroxide, the enzyme has the potential to catalyze the biodegradation of toxic substances like chlorophenols. For this reason, its use in wastewater treatment processes is environmentally friendly since the enzyme can be obtained from a renewable and abun...

The growing utilization of renewable and residual biomasses for environmental preservation and remediation are important goals to be pursued to minimize the environmental impact of human activities. In this paper, sodium alginate (derived from brown algae) was crosslinked using chitosan (mainly derived from the exoskeleton of crustaceans) in the pr...

Humiclike substances (HLS) have been demonstrated to be useful auxiliaries to drive the (photo)-Fenton process at mild pH, by avoiding iron inactivation via formation of active complexes. However, the actual performance of the process is affected by a manifold of opposite processes. In this work, the generation of hydroxyl radical-like reactive spe...

Hybrid magnetite/maghemite nanoparticles (MNP) coated with waste-sourced bio-based substances (BBS) were synthesized and studied for the degradation of phenol, chosen as a model pollutant, in water. A systematic study was undertaken in order to rationalize MNP-BBS behavior and optimize their performance. The effect of experimental parameters, such...

Hybrid magnetite/maghemite nanoparticles (MNP) coated with waste-sourced bio-based substances (BBS) were synthesized and studied for the degradation of phenol, chosen as a model pollutant, in water. A systematic study was undertaken in order to rationalize MNP–BBS behavior and optimize their performance. The effect of experimental parameters, such...

Hydroxypyrone derivatives have a good bioavailability in rats and mice and have been used in drug development. Moreover, they show chelating properties towards vanadyl cation that could be used in insulin-mimetic compound development. In this work, the formation of coordination compounds of oxovanadium(IV) with four kojic acid (5-hydroxy-2-(hydroxy...

In this work the facile preparation of alumina-based hybrid systems supporting Soybean Peroxidase (SBP) for biocatalytic applications was tested and the resulting materials were compared with a previously examined heterogeneous biocatalyst containing SBP covalently immobilized on silica monoliths. The hybrid systems were investigated to obtain stru...

Soybean peroxidase (SBP) has been employed for the treatment of aqueous solutions containing pentachlorophenol (PCP) in the presence of hydrogen peroxide at pH range 5–7. Reaction carried out with 1 mg/L of PCP, 4 mg/L of H2O2, and 1.3 × 10⁻⁹ M of SBP showed a fast initial elimination of PCP (ca. 30% in 20 min), but the reaction does not go beyond...

Soybean peroxidase is a Fe(III)-heme enzyme that can be extracted from soybean seed hulls, and in the presence of hydrogen peroxide it has the potential to catalyze the decomposition of some substrates, such as amines and phenols. In this work, we study the degradation of 2,4,6-trichlorophenol catalyzed by soybean peroxidase. The experimental data...

Urban wastes are a potential source of environment contamination, especially when they are not properly disposed. Nowadays, researchers are finding innovative solutions for recycling and reusing wastes in order to favour a sustainable development from the viewpoint of circular economy. In this context, the lignin-like fraction of biomass derived fr...

The valorization of olive oil mill solid wastes (OMW) has been addressed by considering it as a possible source of humic-like substances (HLSs), to be used as auxiliary substances for photo-Fenton, employing caffeine as a target pollutant to test the efficiency of this approach. The OMW-HLS isolation encompassed the OMW basic hydrolysis, followed b...

Soybean peroxidase is an enzyme that can be sustainably harvested and has the potential to decompose harmful compounds. It may oxidize organic substrates using hydrogen peroxide as electron acceptor, and it is cheap and easy to obtain because Brazil is the second largest soybean producer in the world. However, before the potential of this enzyme ca...

Continuous photolysis experiments and transient absorption spectroscopy were performed in combination with other techniques including HRTEM, XPS, Raman, TGA, and ESR spectroscopy, to investigate the role of residual metals and amorphous carbon on the photochemical process taking place after 350–355 nm light irradiation of as obtained commercial mul...

The visible light induced cationic polymerization of epoxides can be achieved by means of multiwalled carbon nanotubes (MWCNTs), which act as visible light photoinitiators via a radical‐induced cationic photopolymerization process. When MWCNTs are irradiated with longer wavelengths (above 400 nm), they generate carbon radicals, by means of hydrogen...

Over the last years, urban wastes have become a major source of environment contamination, especially when they are not properly disposed. Nowadays, researchers are finding innovative solutions for recycling and reusing of wastes in order to favour a sustainable development of our society in the viewpoint of circular economy. In this context, the r...

Industrialization and accelerated population growth have been creating tremendous air pollution. Carbon dioxide (CO2) from fossil fuels combustion is a concerning waste gas, responsible of greenhouse effect: it increases atmospheric temperature contributing to more than 60% of global warming. Hence, reduction of CO2 emissions is one of the biggest...

Enzymes are the biocatalysts of the living world, but their properties render them also exploitable in many applications that range from industrial catalysis to therapeutics, including synthetic and pharmaceutical chemistry, wastewater bioremediation, fabrication of high-performance biosensors, among others.evaluation of the cost of the biocatalyti...

Peroxidase immobilization onto magnetic supports is considered an innovative strategy for the development of technologies that involves enzymes in wastewater treatment. In this work, magnetic biocatalysts were prepared by immobilization of soybean peroxidase (SBP) onto different silica-coated superparamagnetic iron oxide nanoparticles. The obtained...

The presence of pollutants in water systems is a universal threat. In this study, ZnO based materials and enzyme hybrid materials were evaluated for their ability to remove six emerging wastewater pollutants (namely diclofenac, naproxen, iopamidol, imidacloprid, bisphenol A and 2,4-dichlorophenol). These materials were tested in their free form as...

Enzymes are the biocatalysts of the living world, but their properties render them also exploitable in many applications that range from industrial catalysis to therapeutics, including synthetic and pharmaceutical chemistry, wastewater bioremediation, fabrication of high performance biosensors, among others. [1-4] The use of enzymes, however, is li...

Enzymes are the biocatalysts of the living world, but their properties render them also exploitable in many applications that range from industrial catalysis to therapeutics, including synthetic and pharmaceutical chemistry, wastewater bioremediation, fabrication of high performance biosensors, among others. [1-4]

Brønsted acid catalyst, has been immobilized on 3-aminopropil silica gel, by means of an amide bond, to afford a new heterogeneous catalyst. Its structure has been confirmed using IR and NMR spectroscopy. This new catalyst has been employed in five different organic reactions giving excellent results. At the end of the processes, it was recovered b...

A Sr0.85Ce0.15FeO3-δ perovskite-type mixed oxide was prepared by solution combustion synthesis from citric acid and carefully characterized for the structure by X-ray diffraction coupled with Rietveld analysis, for the microstructure/morphology by HRTEM and SEM, for texture by N2 uptake at low temperature, for surface charge by ζ potential measurem...

Among the organic pollutants, the attention on emerging contaminants is nowadays increasing because of their ubiquitous presence in the environment. Their behavior in the environment is almost unknown and they represent a potential hazard for human health and environment. Moreover, most of them are resistant to the common systems of treatment of wa...

In this paper, the removal of three common dyes (orange I, orange II, and methylorange) and of the anticonvulsant drug carbamazepine from aqueous solutions by means of enzymatic and photocatalytic treatment was studied. Soybean peroxidase (SBP) was used as biocatalyst, both free in solution and immobilized on silica monoliths, and titanium dioxide...

Synthesis, characterization and application of cerium doped strontium ferrite for wstewater remediation. Activity as catalyst and photocatalyst was revisited, deepening the production of oxygen reactive species as well.

Microfluidic reaction devices are a very promising technology for chemical and biochemical processes. In microreactors, the micro dimensions, coupled with a high surface area/volume ratio, permit rapid heat exchange and mass transfer, resulting in higher reaction yields and reaction rates than in conventional reactors. Moreover, the lower energy co...

We have explored the impact of the incorporation of nanoporous carbons as additives to tungsten oxide on the photocatalytic degradation of two recalcitrant pollutants: rhodamine B (RhB) and phenol, under simulated solar light. For this purpose, WO3/carbon mixtures were prepared using three carbon materials with different properties (in terms of por...

Humic substances were widely studied for preparing materials to be used for adsorption, photocatalysis and so on. Their parent soluble bio-organic materials (SBO) have potentially similar applications which have to be evaluated. The main advantage of the use of SBO substances concerns their low cost, but they are appealing also for the development...

Understanding the mechanisms acting behind the functionalization of graphene is of paramount importance for the application of functionalized graphene in polymeric nano-composite materials. This work reports the study of the influence of benzophenone in a UV-mediated grafting process on graphene oxide, carried out by unconventional spectroscopic te...

This investigation deals with coordination compounds of oxidovanadium(IV) with L-malic and L-tartaric acids in aqueous solution. The different binary systems are studied by potentiometric, spectroscopic techniques and DFT calculation in a wide concentration range and with different metal/ligand ratios. Electronic paramagnetic resonance spectroscopy...

In the present work, we prepared a new photoactive system, able to remove water pollutants by dispersion of TiO2 and the enzyme soybean peroxidase (SBP) within a polymer matrix. UV-cured acrylic polymeric films were prepared, in the presence of TiO2 and SBP. The choice of SBP was based on its ability to catalyze the oxidation of several substrates,...

As the world’s population continues to grow so does the demand for food, and in consequence the amount of material left over from food production. No longer considered simply as "waste", many food co-products are being identified as economically-viable raw materials and their potential is enhanced by modern processing technologies and the biorefine...

Soluble bio-based substances (SBO) have been isolated from urban waste. Their structural similarity with natural organic matter suggested exploring their activity in the photodegradation of organic substrates. In this work, they are shown to promote the photodegradation of monochlorophenols. Experiments performed with 1.0 × 10–4 M substrate solutio...

Vanadium compounds are known to display a number of therapeutic effects, namely insulin-mimetic and cardiovascular effects. Evidence of the antiproliferative and proapoptotic activity of a number of vanadyl complexes, together with their low toxicity, establishes these metal compounds as promising antitumoral therapeutic agents. In the present work...

This work provides an experimental evidence of the photoinduced generation of radical species upon UV irradiation of aqueous suspensions of carbon materials with varied textural, structural and chemical composition. The use of a powerful spectroscopic tool as spin trapping electron spin resonance (ESR) has allowed to detect and identify these radic...

This work demonstrates the ability of ash-free activated carbons to interact with UV light to promote the photooxidation of phenol in solution through the formation of radical species. Our results show that in the absence of inorganic impurities or semiconductor additives, the photodegradation efficiency of the studied activated carbons has to be a...

A silica monolith was prepared from commercial silica powder dispersed in water containing polymeric water soluble bio-organics (SBOs) isolated from composted urban vegetable wastes. The monolith and the pristine powder were characterized for their morphology and reactivity for immobilizing soybean peroxidase (SBP). Compared to the pristine powder,...

Several new siliceous monoliths have been investigated for the immobilization of lipase from Candida antarctica. These monoliths present different hydrophobicity due to the different percentage of two kinds of commercial silica used in their formulation, which varies from 100% Aerosil 300 (the most hydrophobic) to 100% Sipernat320 (the most hydroph...

The enzyme soybean peroxidase (SBP) is able to catalyze the oxidation of a large number of substrates and is characterized by high resistance to both chemical and thermal denaturation. In this contribution SBP was covalently immobilized on aminopropyl glass beads (APG) in order to obtain a solid biocatalyst, useful either in degradation of pollutan...

In the field of implantation, the delivery and/or immobilization of biomolecules developing a specific action on bone mineralization has attracted great attention in the last few years. In fact, a wide spectrum of enzymes and proteins have been grafted with different methods onto/within implanted materials. Bioactive glasses and glass-ceramics, due...

In the field of implantation, the delivery and/or immobilization of biomolecules developing a specific action on bone mineralization has attracted great attention in the last few years. In fact, a wide spectrum of enzymes and proteins have been grafted with different methods onto/within implanted materials. Bioactive glasses and glass-ceramics, due...

Reactive dyes are widely employed in textile industries and their removal from wastewaters is a relevant environmental problem. In addition to chemical and physical methods, several bioremediation approaches, involving intact micro-organisms or isolated enzymes, have been proposed to decolorize dye solutions. In this paper, we report the complete a...

Urban waste-derived bioorganic substances (UW-BOS) have shown promise as chemical auxiliaries for a number of technological applications in the chemical industry and in environmental remediation. In this study, the application of these substances in the photodegradation of organic pollutants is addressed. The experimental work is specifically focus...

It is demonstrated here that bioactive glasses containing Au nanoparticles (AuNPs) can be selectively functionalized with small molecules carrying either amino or thiol groups by simply varying the temperature and pH of the functionalization batch. The results evidence the following. (i) At room temperature (RT), no functionalization of Au-free gla...

In this paper we report an investigation on coordination compounds of vanadyl ion with citric, D(+)-threo-isocitric, cis- and trans-aconitic acids in aqueous solution. The different binary systems have been studied by potentiometric and spectroscopic techniques (t=25°C, I=0.1moldm−3). Electronic paramagnetic resonance spectroscopy (EPR) at room tem...

Bioactive glasses such as Hench's 45S5 (Bioglass) have applications to tissue engineering as well as bone repair, and the insertion of fluoride in their composition has been proposed to enhance their bioactivity. In view of a potential clinical application, we investigated whether fluoride-containing glasses exert toxic effects on human MG-63 osteo...

The involvement of protein denaturation and/or misfolding processes in the insurgence of several diseases raises the interest in structural dynamic studies of proteins. The use of nitroxide spin labels with electron paramagnetic resonance is a powerful tool for detecting structural changes in proteins. In the present study, we apply this strategy t...

We report a study of hydrogen adsorption experiment on SWNT samples deposited by chemical vapor deposition (CVD) and investigated with Electron Spin Resonance spectroscopy (ESR) before and after hydrogen treatment. The ESR investigation was performed at room and low temperature (4–30 K). We found that ESR technique is very useful to investigate par...

Natural sediments show sequestering properties that can lead to a process of self-purification of aquatic environment from metal pollution. The study of the interaction between metal ions and sediment particles enhances what is known about the distribution and bioavailability of heavy metals in natural systems. Our contribution concerns the charact...

KatB is the only catalase–peroxidase identified so far in Sinorhizobium meliloti. It plays a housekeeping role, as it is expressed throughout all the growth phases of the free-living bacterium and also during symbiosis. This paper describes the functional and structural characterization of the KatB mutants Gly303Ser, Trp95Ala, Trp95Phe, Tyr217Leu,...

An ESR investigation of the interaction of spin-labelled penetratin with heparin, heparansulfates and several phospholipid vesicle formulations is reported. Penetratin is a 16-aa peptide corresponding to the third helix of the Antennapedia homeodomain and belonging to the cell-penetrating peptide family. The present study shows that ESR spectroscop...

Three genes encoding heme hydroperoxidases (katA, katB, and katC) have been identified in the soil bacterium Sinorhizobium meliloti. The recombinant proteins were overexpressed in Escherichia coli and purified in order to achieve a spectral and kinetic characterization. The three proteins contain heme b with high-spin Fe(III). KatB is an acidic bif...

Organic management frequently involves a reduction of nitrogen input and it is claimed to increase grape quality. Excess nitrogen application reduces anthocyanin concentration, thus decreasing the antioxidative potential of grapes and wines. In order to compare the effects of organic and conventional fertilization management on vine performance and...

Although belonging to the widely investigated peroxidase superfamily, lactoperoxidase (LPO) and myeloperoxidase (MPO) share structural and functional features that make them peculiar with respect to other enzymes of the same group. A survey of the available literature on their catalytic intermediates enabled us to ask some questions that remained u...

The hydrogen peroxide-oxidation of 2,4-dichlorophenol catalyzed by horseradish peroxidase has been studied by means of UV-visible spectroscopy and mass spectrometry in order to clarify the reaction mechanism. The dimerization of 2,4-dichlorophenol to 2,4-dichloro-6-(2,4-dichlorophenoxy)-phenol and its subsequent oxidation to 2-chloro-6-(2,4-dichlor...

The interaction of native bovine lactoperoxidase (nbLPO) with four substrates has been studied and compared with that of recombinant human myeloperoxidase (rhMPO). Kinetic, spectroscopic and binding parameters extrapolated for each enzyme-substrate adduct have been interpreted in the light of the structural data available for myeloperoxidase (X-ray...

The properties of photoluminescence (PL) in nitrogenated and non-nitrogenated amorphous carbon films are discussed. Emphasis is given to nitrogenated films and their peculiarities. The role of oxygen, through structural relaxation, and of nitrogen, due to structural relaxation and lone pairs, is discussed. A general correlation between the density...

We subjected bean plants (Phaseolus vulgaris L. cv. ‘Zlota Saxa’) to phosphate deficiency stress and studied free radical production in whole root extracts. Starting from the 12th day of growth a carbon-centred free radical was detected, by means of electron spin resonance (ESR) after spin trapping with 5,5-dimethyl-L-pyrroline-N-oxide (DMPO), only...

The reaction mechanism of the oxidation of 2,6-dichlorophenol (2,6-DCP) by horseradish peroxidase (HRP) and H2O2 has been investigated and the reaction products have been characterized by UV-visible and mass spectrometry. Evidence for the dimerization of 2,6-DCP to 3,3',5,5'-tetrachloro-4,4'-dihydroxybiphenyl and the subsequent fast oxidation of th...

Electrochemical biosensors have found wide application in food and clinical areas, as well as in environmental field. A large number of articles focused on horseradish peroxidase (HRP)-based biosensors have been published in the last decade, due to the capability of HRP to quantitatively detect the presence of hydrogen peroxide produced in a reacti...

The electron-spin-resonance (ESR) features of tetrahedral amorphous carbon (ta-C) samples deposited by S-bend filtered cathodic vacuum arc (FCVA) are investigated in a wide temperature range (4.3–295 K) before and after post-deposition annealing at 500 °C. Special attention is given to the temperature dependence of the linewidths. While the sp3 con...

We discuss the structural (Raman, infrared) and paramagnetic (electron-spin-resonance) characterisation of a set of amorphous carbon nitride thin films. Some features of the ESR signal are different with respect to non-nitrogenated sp2-rich amorphous carbons (a-C). For instance, the temperature dependence of the ESR line-width indicates that the sp...

The deposition and characterisation of tetrahedral amorphous carbon (ta-C) with an E-04 optical gap of 3.5 eV and Tauc gap of 3 eV is presented. This is the highest optical gap reported in literature for ta-C and was directly measured using photothermal deflection spectroscopy (PDS) and UV-Vis spectrophotometry. Independent PDS, UV-Vis and electron...

Perfluoropolyethers show promising properties for coil coating application and a suitable layer is obtained by incorporating them in a crosslinked polyurethane network. However, photo-oxidative stability of urethane linkages is intrinsically low and an appropriate stabiliser must be added to the reactants prior to curing. The N-methyl HAS bis(1,2,2...