A5008927605- Mesoporous Materials and Catalysis
- Luminescence and Fluorescent Materials
- Iron oxide chemistry and applications
- Nanoparticle-Based Drug Delivery
- Carbon and Quantum Dots Applications
- Characterization and Applications of Magnetic Nanoparticles
- Aerogels and thermal insulation
- Magnetic Properties and Synthesis of Ferrites
- X-ray Diffraction in Crystallography
- Nanocluster Synthesis and Applications
- Crystallization and Solubility Studies
- Perovskite Materials and Applications
- Magnetic and transport properties of perovskites and related materials
- Supercapacitor Materials and Fabrication
- Ammonia Synthesis and Nitrogen Reduction
- Gold and Silver Nanoparticles Synthesis and Applications
- Catalytic Processes in Materials Science
- Luminescence Properties of Advanced Materials
- Organic and Molecular Conductors Research
- Electrochemical sensors and biosensors
- Enzyme Catalysis and Immobilization
- Advanced Photocatalysis Techniques
- Graphene and Nanomaterials Applications
- Sulfur-Based Synthesis Techniques
- Advanced Cellulose Research Studies
University of Cagliari
2013-2024
National Interuniversity Consortium of Materials Science and Technology
2015-2020
Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari
2001-2018
University of Kent
2009
Institut Català de Nanociència i Nanotecnologia
2009
Center for NanoScience
2009
Ludwig-Maximilians-Universität München
2009
Philipps University of Marburg
2009
University of Trieste
2009
Abstract Highly fluorescent blue and green-emitting carbon dots have been designed to be integrated into sol-gel processing of hybrid organic-inorganic materials through surface modification with an organosilane, 3-(aminopropyl)triethoxysilane (APTES). The synthesised using citric acid urea as precursors; the intense fluorescence exhibited by nanoparticles, among highest reported in scientific literature, has stabilised against quenching APTES. When is carried out aqueous solution, it leads...
In this work a sample of SBA-15 mesoporous silica was synthesized and characterized by TEM, XRD, N2 adsorption. The had high value specific surface area (1007 m2 g-1) total pore volume (2.1 cm3 g-1). diameter 67 Å, so it large enough to accommodate protein molecules inside the channels. Immobilization physical adsorption commercial lipase preparation from Mucor javanicus performed at different pH values (pH 5−8). 6 gave highest loading hydrolytic activity corresponding biocatalyst. Chemical...
A one-pot approach making use of a zinc oxide sol precursor and carbon quantum dots, together with partially fluorinated block copolymer as templating agent, has been used to synthesize porous matrix characterized by interesting energy transfer properties. The choice the surfactant for inducing porosity into inorganic allowed an easy removal agent at low temperature, preserving same time functional properties dots. resulting nanocomposite films have steady-state 3D mapping that evidenced...
Abstract Immobilization of Pseudomonas fluorescens lipase (Pfl) on the chemically modified, or unmodified, surface SBA‐15 mesoporous silica has been achieved. X‐ray diffraction (XRD), transmission electron microscopy (TEM), and N 2 physisorption are used to monitor effect functionalization structural textural features support. The enzyme loading strongly depends type enzyme–support interaction, maximal chemisorbed being about twice that physisorbed (502 256 mg protein ${{\rm g}{{- 1\hfill...
A series of La1−xSrxNi0.6Fe0.4O3 mixed oxides were synthesized by a coprecipitation method, followed calcination at 1000 °C. Materials with x < 0.100 exhibited rhombohedral structure similar to that observed for La0.4Ni0.6Fe0.4O3, whereas materials between 0.125 and 0.150 orthorhombic. The unit-cell volume decreased linearly from = 0 0.090, but increased increasing Sr2+ content. still higher Sr content (x 0.200 0.300) additional XRD reflections indicating the limit solubility into...
Abstract The scientific community is actively engaged in the development of innovative nanomaterials with broad‐spectrum virucidal properties, particularly those capable producing reactive oxygen species (ROS), to combat upcoming pandemics effectively. generation ROS inhibiting viral activity on high‐touch surfaces can prove an effective means reducing pathogenic and infections, while avoiding exacerbation antibiotic resistance resulting from extensive use chemical disinfectants. Carbon dots...
Nearly monodisperse iron oxide colloidal nanocrystals prepared by nonhydrolytic high-temperature solution method were obtained with two different sizes and degrees of oxidation. The characterization the structural features was performed a multitechnique approach including transmission electron microscopy, X-ray diffraction absorption spectroscopy, energy filtered microscopy imaging, SQUID magnetometry. techniques provided complementary information on local oxidation state in nanoparticles,...
β-Cyclodextrin-functionalized silver nanoparticles were embedded within an alginate matrix to obtain hydrogels that capture, detect and remove organic pollutants from water.
Fluorescence emission of proteins containing aromatic groups and conjugated bonds is generally associated with light absorption in the ultraviolet range, around 185–320 nm. Photoluminescence nonaromatic biopolymers, however, has also been observed amyloid-like structures polymers derived from l-lysine glycine. Here, we show, for first time, that branched obtained through thermal copolymerization two amino acids, l-glutamic acid, exhibit two-color centers relative absorptions visible range....
Pt–CeO<sub>2</sub> nanoparticles confined in mesoporous silica SBA-16 as successful catalysts for the single step, low temperature water gas shift reaction.
To fully exploit the potential of self-assembly in a single step, we have designed an integrated process to obtain mesoporous graphene nanocomposite films. The synthesis allows incorporating sheets with small number defects into highly ordered and transparent titania careful design porous matrix at mesoscale ensures highest diffusivity These exhibit enhanced photocatalytic efficiency, while high order mesoporosity is not affected by insertion well-preserved after controlled thermal...
Colloidal magnetic nanoparticles (MNPs) based on a nearly monodisperse iron oxide core and capped by oleic acid have been used as model systems for investigating the superparamagnetic spin dynamics means of magnetometry measurements nuclear resonance (1H NMR) relaxometry. The key properties (saturation magnetization, coercive field, frequency dependent "blocking" temperature) MNPs with different size (3.5 nm, 8.5 17.5 nm), shape (spherical cubic), dispersant (hexane water-based formulation)...
The purpose of this work was the assembly multicomponent nano-bioconjugates based on mesoporous silica nanoparticles (MSNs), proteins (bovine serum albumin, BSA, or lysozyme, LYZ), and gold (GNPs). These may find applications in nanomedicine as theranostic devices. Indeed, MSNs can act drug carriers, stabilize within bloodstream, have therapeutic targeting functions. Finally, GNPs either be used contrast agents for imaging photothermal therapy. Here, amino-functionalized (MSN-NH2) were...
Nickel cobaltite can have a larger average overall oxidation state of the cobalt and nickel cations, than expected.
Abstract Carbonized polymer dots (CPDs), a peculiar type of carbon dots, show extremely high quantum yields, making them very attractive nanostructures for application in optics and biophotonics. The origin the strong photoluminescence CPDs resides complicated interplay several radiative mechanisms. To understand correlation between CPD processing properties, early stage formation carbonized has been studied. In synthesis, citric acid monohydrate 2‐amino‐2‐(hydroxymethyl)propane‐1,3‐diol...
We developed an oxygen sensor based on mesoporous titania films working at RT under UV irradiation. Due to larger surface area and number of defects, the film exhibits a response higher than dense titania.