Alessandro Martucci

Alessandro Martucci
University of Padova | UNIPD · Department of Industrial Engineering

Professor

About

286
Publications
28,344
Reads
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6,516
Citations
Citations since 2016
85 Research Items
3375 Citations
20162017201820192020202120220100200300400500
20162017201820192020202120220100200300400500
20162017201820192020202120220100200300400500
20162017201820192020202120220100200300400500

Publications

Publications (286)
Article
Full-text available
In this work, we investigated the possible incorporation of YAG (yttrium aluminum garnet)-Ce particles into plasma electrolytic oxidation (PEO) coatings on 1050AA (aluminum alloy) in order to endow the surface with photoluminescent properties. Different treatment times and current modes (direct or pulsed) were tested as PEO process parameters using...
Article
Full-text available
Several patterned coatings with a hybrid organic-inorganic nature were deposited on metallic substrates by exploiting the dewetting of a sol–gel bilayer. The hybrid coatings, inspired by the exoskeleton of a desert beetle, consisted of hydrophilic silica droplets on a hydrophobic CH3-silica bottom layer. The patterned morphology was tuned by changi...
Article
Full-text available
Dropwise condensation (DWC) is a complex phase-change phenomenon involving the formation of randomly distributed droplets on the condensing surface. The promotion of DWC instead of the traditional filmwise condensation (FWC) is a promising solution to enhance the efficiency of heat exchangers by increasing the condensation heat transfer coefficient...
Article
A new experimental apparatus for the investigation of dropwise condensation from humid air flowing over a vertical aluminum surface at controlled velocity is presented. Differently from other works on this subject, here we simultaneously measure, during condensation of flowing moist air, the total heat flux (by a heat flux sensor), the latent heat...
Article
Full-text available
In this paper, we report silk fibroin (SF) and carbon quantum dots (CQDs) nanocomposites obtained through a facile solution casting approach. The optical properties of the nanocomposites have been characterised by UV–vis absorption and photoluminescence spectroscopy. Crosslinking of SF and chemical interactions with the CQDs have been investigated...
Article
Full-text available
It is well known that dropwise condensation (DWC) can achieve heat transfer coefficients (HTCs) up to 5-8 times higher as compared to filmwise condensation (FWC). The interaction between the condensing fluid and the surface defines the condensation mode. Coatings that present low surface energy and high droplet mobility are a solution to promote DW...
Article
Full-text available
Dye-sensitized photoelectrochemical cells represent an appealing solution for artificial photosynthesis, aimed at the conversion of solar light into fuels or commodity chemicals. Extensive efforts have been directed towards the development of photoelectrodes combining semiconductor materials and organic dyes; the use of molecular components allows...
Article
Full-text available
The out-of-plane optical constants of monolayer two-dimensional materials have proven to be experimentally elusive. Owing to their reduced dimensionality, optical measurements have limited sensitivity to these properties which are hidden by the optical response of the substrate. Therefore, there remains an absence of scientific consensus on how to...
Article
Full-text available
Methods for the fabrication of thin films with well controlled structure and properties are of great importance for the development of functional devices for a large range of applications. SILAR, the acronym for Successive Ionic Layer Adsorption and Reaction, is an evolution and combination of two other deposition methods, the Atomic Layer Depositi...
Article
Biopolymer-based nanocomposites are materials composed mainly of biopolymer matrices in which nanofillers are dispersed. Biopolymers are polymers obtained from some living organisms; therefore they are biodegradable and biocompatible; moreover, they have a variety of functional groups allowing the control of the interface with nanofillers and the m...
Cover Page
Full-text available
An overview of biopolymer-based nanocomposites for optics and electronics Artwork designed with the help of Anna and Francesca De Marzi and reproduced with permission of Alessandro Martucci.
Article
In this paper we report on the combined visible-light (red λ = 630 nm; green λ = 570 nm; purple-blue λ = 430 nm) and mild thermal-activation modes (25°C - 100°C) towards ppb-level NO2 detection of ZnO nanocrystalline film containing trivalent (Al-Ga) and tetravalent (Si-Ge) ions. Both trivalent and tetravalent doping trigger visible light fast resp...
Article
In this paper we report on the study of sintered ceramic composites based on a low melting glass in which ZnO nanocrystals and commercial YAG:Ce³⁺ phosphor are embedded. A low Tg is necessary to avoid high temperature sintering which can damage the optical properties of the embedded phosphor, while ZnO is introduced to increase the thermal conducti...
Preprint
Full-text available
The out-of-plane optical constants of two-dimensional materials have proven to be experimentally elusive. Owing to the reduced dimensionality of a monolayer, optical measurements have limited sensitivity to these properties, which are hidden by the optical response of the substrate. Therefore, there remains an absence of scientific consensus on how...
Article
Dropwise condensation (DWC) is a complex phenomenon involving droplets nucleation, coalescence and motion. Starting from the nanoscale up to the macroscale, DWC involves millions of droplets per square meter. The maximum dimension assumed by a droplet before sliding is characterized by the departing radius: it is the radius at which the droplet sta...
Article
Full-text available
Fullerene C 60 (FC 60), with its unique physical properties, has been used in many applications in recent decades. The increased likelihood of direct release into the environment has raised interest in understanding the biological effects of FC 60 to aquatic organisms. Nowadays, only few studies have analysed FC 60 effects and bioaccumulation in ma...
Article
Full-text available
Hydrophobic coatings have the ability to promote dropwise condensation on metal surfaces. In this work, reduced graphene oxide coatings are fabricated by dip coating copper substrates into a graphene oxide colloidal suspension, followed by thermal reduction. The formation of reduced graphene oxide is demonstrated by Raman and X‐ray photoelectron sp...
Article
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Solution processed TiO2 anatase film was used as sensitive layer for H2 detection for two plasmonic sensor configurations: A grating-coupled surface plasmon resonance sensor and a localized surface plasmon resonance sensor with gold nanoparticles. The main purpose of this paper is to elucidate the different H2 response observed for the two types of...
Article
Long-term sustainability of dropwise condensation (DWC) on treated surfaces is a key point for the exploitation of this heat transfer mechanism in industrial applications. A viable solution to achieve DWC, consisting of hybrid organic-inorganic sol-gel silica coatings containing hydrophobic moieties (methyl or phenyl group) is here presented. Diffe...
Article
This paper investigates the tribological and mechanical properties of silk-based nanocomposite coatings which are finding applications in optics, biomedicine and dentistry, thanks to the exceptional mechanical/optical properties and associated biocompatibility of silk. Three different nanocomposite formulations were synthesized, and thin films were...
Article
Full-text available
We developed hybrid organic–inorganic sol–gel silica coatings with good durability in harsh environment (high temperatures, high vapor velocities) and with slightly hydrophobic behavior, sufficient to promote dropwise condensation (DWC) of pure steam. DWC is a very promising mechanism in new trends of thermal management and power generation systems...
Article
In this work, ytterbium doped nickel oxide thin films were successfully synthesized and deposited on glass substrates using the sol-gel method combined with the spin-coating technique. The structural, morphological and optical properties of the films were investigated through XRD, AFM, UV-Vis and PL spectroscopy. Doping NiO with low Yb3+ ions conte...
Article
Full-text available
In this paper we studied the combination of advanced oxidation processes (AOPs), i.e., TiO2-based photocatalysis and photo-Fenton process, on the degradation of aqueous solutions containing a low (90 ppm) concentration of formaldehyde. Heterogeneous nanostructured catalysts, supported on polymeric nanofibers, were used; for comparison, some homogen...
Article
Full-text available
We employ a recent formulation for the optical properties of two-dimensional crystals from first principles [L. Matthes et al., New J. Phys. 16, 105007 (2014); L. Matthes et al., Phys. Rev. B 94, 205408 (2016)] to compute the surface susceptibility and surface conductivity of MoS2 and WSe2 monolayers [G. Jayaswal et al., Opt. Lett. 43, 703 (2018)]....
Article
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A non-enzymatic sensor was developed for simultaneous detection of glucose, ethanol, and glycerol concentrations in wine using nickel nanoparticles on nitrogen-doped graphene, Ni-NGr. The sensor was fabricated from nickel nitrate, graphene oxide, and uric acid via facile thermal annealing process. The Ni-NGr sensor exhibited superior electrocatalyt...
Chapter
This chapter describes the results obtained by the authors in the field of nanocomposite materials with an inorganic or organic–inorganic hybrid matrix obtained by the sol–gel method and doped with semiconductor quantum dots, with the aim to produce materials suitable for photonic applications. The general strategies used for the synthesis are firs...
Chapter
In this chapter we present an overview of optical gas sensors based on sol–gel materials, with particular emphasis on surface plasmon resonance-based sensor. The definition of optical gas sensor and the main parameters used for characterizing gas sensors are described in the introduction. A section is devoted to plasmonic gas sensors which are opti...
Article
Full-text available
We have investigated three-dimensional (3D) MoS2 nanoarchitectures doped with different amount of Ni to boost the hydrogen evolution reaction (HER) in alkaline environment, where this reaction is normally hindered. As a comparison, the activity in acidic media was also investigated to determine and compare the role of the Ni sites in both media. Th...
Article
Wavelength and polarization-dependent phase shifts on light interacting with a phase change material can lead to coloration shifts. By exploiting polarization selective effects, the range of attainable colors during switching of a phase-change layer is widened. Theoretical and experimental results are shown for the case of VO2, a reversible phase c...
Article
A high efficiency hybrid electrocatalyst (Co3O4-rGO-gC3N4) was developed via a facile method of doping cobalt oxide (Co3O4) on reduced graphene oxide (rGO) supported by graphitic carbon nitride (GCN, g-C3N4). The synthesized composite was tested for supercapacitance and hydrogen evolution reaction (HER) activity. The results demonstrate excellent s...
Article
Full-text available
Gas species recognition through fully optical devices is currently a raising trend over the wellestablishedconductometric approach [...]
Article
Plasma Electrolytic Oxidation (PEO) is a quite new process which allows the formation of porous ceramic oxide layer on metallic substrates. In this work, hybrid organic-inorganic sol-gel hydrophobic coatings, called M7T3, were deposited on PEO layers, produced on 7020 aluminum alloy and AZ80 magnesium alloy with silicates and phosphates solutions....
Article
Full-text available
We present a novel plasmonic hydrogen sensor consisting of an array of gold nanodisks produced by lithography. The size, height, and spacing of the disks were optimized using finite element simulation to generate a sharp localized surface plasmon resonance peak in the near-infrared wavelength region. The reported results show the possibility of dev...
Article
Direct ethanol fuel cells are highly promising energy conversion devices, but the complete oxidation of ethanol to CO 2 at low temperatures is still one of the main challenges. Titanium oxycarbide (TiO 1-x C x ) powder is investigated as stable and synergistic support for Pt nanoparticles during the ethanol oxidation reaction (EOR) in acidic electr...
Cover Page
Full-text available
A bilayer of sol‐gel films is made to dewet by exposure to ethanol solvent. The top hydrophilic silica film dewets into bumps on the bottom hydrophobic silica film. The result is a patterned surface that facilitates the condensation and growth of water droplets from the atmosphere. The resulting patterns are more robust and are less sticky to water...
Article
Dewetting of thin polymer films has been extensively investigated as a way to generate patterned surfaces. In this paper, the controlled dewetting of sol–gel thin films induced by solvent annealing is reported. The key factors that control the dewetting process are identified and patterns with tunable diameter between 5 and 80 µm and tunable height...
Article
Full-text available
The deposition of silica and titania films by electro-assisted technique, with the objective to obtain a multilayer structure, was studied. Tetraethyl orthosilicate/methyl triethoxysilane (TEOS/MTES) mixture and titanium(IV) isopropoxide (TTIP) were used as precursors. The films were deposited on both bare stainless steel and indium tin oxide (ITO)...
Article
It is widely demonstrated that the synthesis conditions of sol-gel films have a great impact on their gas sensing properties. In this work, transparent PVP-assisted nickel oxide thin films with an average grain size of ~5 nm were synthesized using two distinctive deposition procedures combining the sol-gel method with the spin-coating technique the...
Article
Full-text available
In this paper the results obtained in the last ten years by the authors in the field of sol-gel nanocomposites for optical applications are reviewed. Two type of applications are, in particular, discussed: (a) nanocomposite materials containing semiconductor quantum dots for photonic and optoelectronic applications; (b) nanocomposite materials for...
Article
Full-text available
In this paper, we used gallium doped zinc oxide (GZO) nanocrystals as novel plasmonic and chemoresistive sensors for the detection of hazardous gases including hydrogen (H2) and nitrogen dioxide (NO2). GZO nanocrystals with a tunable surface plasmon resonance in the near infrared are obtained using a colloidal heat-up synthesis. Thanks to the stron...
Article
A simple and efficient method is developed to introduce plasmonic and luminescence functionalities in titanate nanosheets (TNSs)–silk nanocomposites by direct cation‐exchange process. First, the cation exchange properties such as exchange kinetic and capacity are studied to verify the behavior of the material and determine the best condition of exc...
Article
Future space missions will operate in increasingly hostile environments, such as those in low-perihelion solar orbits and Jovian magnetosphere. This exploration involves the selection of optical materials and components resistant to the environmental agents. The conditions in space are reproduced on ground through the use of ion accelerators. The e...
Chapter
This chapter describes nanocomposites where at least one of the phases has been obtained by the sol-gel method. In the first part, the synthesis of the nanocomposites is considered, and an attempt is made to resume the general principles and methods related to different classes of materials, with oxide, hybrid organic-inorganic, and polymeric matri...
Article
Superhydrophobic surfaces represent a promising strategy to consistently promote dropwise condensation, which can lead to an important increase of the heat transfer coefficient as compared to filmwise condensation. To get superhydrophobicity, it is necessary to reduce the surface energy and to modify the surface structure by achieving superficial m...
Article
Full-text available
Sub-monolayers of monodisperse Au colloids with different surface coverage have been embedded in between two different metal oxide thin films, combining sol-gel depositions and proper substrates functionalization processes. The synthetized films were TiO₂, ZnO, and NiO. X-ray diffraction shows the crystallinity of all the oxides and verifies the no...
Article
Palladium thin films of different thicknesses have been processed by oxidation and subsequent reduction in hydrogen atmosphere. Hydrogen optical sensing properties of as-deposited (Pd) and processed (r-Pd) samples have been experimentally tested with a H2 concentration of 5% and 1%, discovering that the reduced films show improved performances in t...
Article
Biochemical and cellular responses to low concentrations of TiO2nanoparticles (nTiO2,1 and 10 μg/L) and bulk (bTiO2, 10 μg/L) were evaluated in gills, digestive gland and haemolymph of the clam Ruditapes philippinarum after1, 3 and 7 days' exposure. At 7 days, titanium content was determined in gills and digestive gland. nTiO2significantly increase...
Article
A series of high quality zinc oxide (ZnO) nanocrystal films doped with Ge at different Ge/Zn molar ratios were synthesized by the sol-gel method, and structural and compositional changes induced by Ge doping in the ZnO films were analyzed by x-ray diffraction, x-ray photoelectron spectroscopy and cathodoluminescence spectroscopy. Heavy Ge doping in...
Article
In this study, we report the fabrication of nanocomposites made of titanate nanosheets immobilized in a solid matrix of regenerated silk fibroin as novel heavy-metal-ion removal systems. The capacity of these nanocomposite films to remove lead, mercury, and copper cations from water was investigated, and as shown by the elemental quantitative analy...
Article
We report the design, fabrication and characterization of a silk inverse opal with engineered photonic bandgap. The realization of a controlled defect in the structure demonstrates another step along the...
Article
Full-text available
We show how to correctly extract from the ellipsometric data the surface susceptibility and the surface conductivity that describe the optical properties of monolayer $\rm MoS_2$. Theoretically, these parameters stem from modelling a single-layer two-dimensional crystal as a surface current, a truly two-dimensional model. Currently experimental pra...
Article
Carbon dioxide reduction into useful chemical products is a key technology to address urgent climate and energy challenges. In this study, a nanohybrid made by Co3O4 and graphene is proposed as an efficient electrocatalyst for the selective reduction of CO2 to formate at low overpotential. The comparison between samples with different metal oxide t...
Article
Full-text available
In this paper, we demonstrate the application of ZnO doped with gallium (GZO), aluminum (AZO) and germanium (GeZO) nanocrystals as novel plasmonic and chemiresistive sensors for the detection of hazardous gases including hydrogen (H2) and nitrogen dioxide (NO2). GZO, AZO and GeZO nanocrystals are obtained by non-aqueous colloidal heat-up synthesis...
Article
Highly accessible surface area and heteroatom-doping are desired properties for carbon electrode materials to be used in electrochemical supercapacitors. In this paper, nitrogen and sulfur doped carbon materials with wide mesopores (13-14 nm) were synthetized according to a hard template approach by pyrolysis of sucrose, 1,10-phenanthroline or dibe...