A5075356994- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Plasmonic and Surface Plasmon Research
- Magnetism in coordination complexes
- Gold and Silver Nanoparticles Synthesis and Applications
- Magnetic Properties and Synthesis of Ferrites
- Iron oxide chemistry and applications
- Lanthanide and Transition Metal Complexes
- Characterization and Applications of Magnetic Nanoparticles
- Metamaterials and Metasurfaces Applications
- Nanoparticle-Based Drug Delivery
- Magneto-Optical Properties and Applications
- Molecular Junctions and Nanostructures
- Quantum and electron transport phenomena
- Porphyrin and Phthalocyanine Chemistry
- Advanced NMR Techniques and Applications
- Perovskite Materials and Applications
- Magnetic properties of thin films
- Orbital Angular Momentum in Optics
- Nanocluster Synthesis and Applications
- Molecular spectroscopy and chirality
- Luminescence and Fluorescent Materials
- Advanced Fiber Optic Sensors
- Laser-Ablation Synthesis of Nanoparticles
- Copper-based nanomaterials and applications
University of Pisa
2016-2024
National Interuniversity Consortium of Materials Science and Technology
2014-2024
University of Florence
2011-2024
Industriale Chimica (Italy)
2018-2024
Consorzio Interuniversitario Reattività Chimica e Catalisi
2018-2022
Institute for the Chemistry of OrganoMetallic Compounds
2016
University of Padua
2007-2013
Institute of Molecular Science and Technologies
2012
Centre National de la Recherche Scientifique
2010
The [Dy(tta)3(L)] complex behaves as a single ion magnet both in its crystalline phase and solution. Experimental theoretical magnetic anisotropy axes perfectly match lie along the most electro-negative atoms of coordination sphere. Both VSM MCD measurements highlight robustness complex, with persistence memory effect even solution up to 4 K.
The quest for efficient ways of modulating localized surface plasmon resonance is one the frontiers in current research plasmonics; use a magnetic field as source modulation among most promising candidates active plasmonics. Here we report observation magnetoplasmonic modes on colloidal gold nanoparticles detected by means circular dichroism (MCD) spectroscopy and provide model that able to rationalize reproduce experiment with unprecedented qualitative quantitative accuracy. We believe...
We describe an environmentally friendly, top-down approach to the synthesis of Au89Fe11 nanoparticles (NPs). The plasmonic response gold moiety and magnetism iron coexist in nanoalloy with strong modification compared single element NPs, revealing a non-linear surface plasmon resonance dependence on fraction transition from paramagnetic spin-glass state at low temperature. These nanoalloys are accessible conjugation thiolated molecules they promising contrast agents for magnetic imaging.
The physicochemical properties of spinel oxide magnetic nanoparticles depend critically on both their size and shape. In particular, nanocrystals with cubic morphology have shown superior in comparison to spherical counterparts a variety fields, like, for example, biomedicine. Therefore, having an accurate control over the nanoparticle shape size, while preserving crystallinity, becomes crucial many applications. However, despite increasing interest nanocubes there are relatively few studies...
Zinc substitution is often proposed as an efficient strategy to improve the performances of spinel ferrite nanoparticles, particularly related their application theranostic agents. In this work, a series 8 nm nanoparticles formula CoxZnyFe3–(x+y)O4 synthesized by thermal decomposition with purpose investigating role Zn2+ ions in modifying structural and magnetic properties. Contrary most literature on subject, where sum Co Zn kept constant (x + y = 1), here, amount maintained at ca. x 0.6,...
Here, we synthesize a Au@Fe
Plasmonics represents a unique approach to confine and enhance electromagnetic radiation well below the diffraction limit, bringing huge potential for novel applications, instance, in energy harvesting, optoelectronics, nanoscale biochemistry. To achieve functionalities, combination of plasmonic properties with other material functions has become increasingly attractive. In this Perspective, we review current state art, challenges, future opportunities within field magnetoplasmonics confined...
Abstract The deposition of Mn 12 single molecule magnets on gold surfaces was studied for the first time using combined X‐ray absorption spectroscopy (XAS) and magnetic circular dichroism (XMCD) methods at low temperature. ability proposed approach to probe electronic structure magnetism complexes without significant sample damage successfully checked bulk samples. Detailed information oxidation state polarization manganese ions in adsorbates obtained from XAS XMCD spectra, respectively....
We present a study of the structural, magnetic, and magneto-optical properties series Co-substituted ferrite nanoparticles (NPs) prepared by thermal decomposition metallo-organic precursors in high boiling solvents. The structural characterization, carried out using several techniques (transmission electron microscopy (TEM), X-ray diffraction (XRD), absorption spectroscopy (XAS), magnetic circular dichroism measurements), showed all samples are crystalline, 5–6 nm spherical NPs with cubic...
Magnetic nanoparticles (MNPs) have shown exceptional potential for several biological and clinical applications. However, MNPs must be coated by a biocompatible shell such The aim of this study is to understand if how the surface charge coating can affect electronic magnetic properties CoFe2O4 MNPs. role on total moment controversial issue, effects contribute make it deviate from bulk value, including charge, nature coating, also synthetic technique. Positively negatively charged uncoated...
The paper describes the effect of a low-frequency alternating magnetic field (LF-AMF) on permeability and release properties large (LUVs) giant (GUVs) unilamellar vesicles loaded with citrate coated cobalt ferrite nanoparticles (NPs). shell allows high loading NPs in lipid without modifying their properties. increase LUVs upon exposure to LF-AMF has been evaluated as fluorescence self-quenching carboxyfluorescein (CF) entrapped inside liposome aqueous pool. Liposome leakage monitored...
Magnetic nanostructures sustaining different types of optical modes have been used for magnetometry and label-free ultrasensitive refractive index probing, where the main challenge is realization compact devices that are able to transfer this technology from research laboratories smart industry. This Perspective discusses state-of-the-art emerging trends in realizing innovative sensors containing new architectures materials exploiting unique ability actively manipulate their properties using...
The use of magneto-optical techniques to tune the plasmonic response nanostructures is a hot topic in active plasmonics, with fascinating implications for several plasmon-based applications and devices. For this emerging field, called magnetoplasmonics, nanomaterials strong optical magnetic field are desired, which generally challenging achieve pure noble metals. To overcome issue, efforts have been carried out design tailor metal nanostructures, mainly by combining materials single...
The surface sensitivity of X-ray Magnetic Circular Dichroism in extreme conditions is exploited to investigate the first layers bulk single-molecule magnets (SMM). Striking differences emerge between two classes SMM with different structural constraints, thus highlighting importance molecular design realization spintronic devices
The magnetization of single-molecule magnets (SMMs) in non-crystalline materials is probed using high-sensitivity magneto-optical techniques. environment strongly influences the magnetic properties and dramatically changes spin dynamics. Comparison between different indicates phonon bath as a possible source effect. These results indicate importance when designing modeling SMM-based spintronic devices.
We report on the unprecedented direct observation of spin-polarization transfer across colloidal magneto-plasmonic Au@Fe-oxide core@shell nanocrystal heterostructures. A magnetic moment is induced into Au domain when shell contains a reduced Fe-oxide phase in contact with noble metal. An increased hole density states suggested occurrence charge-transfer process concomitant to magnetization transfer. The angular spin ratio, morb/mspin, for 5d states, which was found be equal 0.38, appeared...
Terbium(III) bis-phthalocyaninato neutral complex, a robust and evaporable Single Molecule Magnet (SMM) with record height of the anisotropy barrier, has recently attracted great interest as an active unit in single molecule electronics, but at same time its magnetic hysteresis been found to be strongly affected when environment is different from crystalline phase. Here we present systematic investigation magnetization dynamics environments, obtained by dilution, thermal treatment...
Active nanophotonics can be realized by controlling the optical properties of materials with external magnetic fields. Here, we explore influence anisotropy on magneto-optical activity in nonmagnetic hyperbolic nanoparticles. We demonstrate that response is driven dispersion via coupling metallic-induced electric and dielectric-induced dipolar modes static Magnetic circular dichroism experiments confirm theoretical predictions reveal tunable across visible near infrared spectral range.
Active modulation of the plasmonic response is at forefront today's research in nano-optics. For a fast and reversible modulation, external magnetic fields are among most promising approaches. However, fundamental limitations metals hamper applicability magnetoplasmonics real-life active devices. While improved achievable using ferromagnetic or ferromagnetic-noble metal hybrid nanostructures, these suffer from severely broadened response, ultimately decreasing their performance. Here we...
It is well assessed that the charge transport through a chiral potential barrier can result in spin-polarized charges. The possibility of driving this process visible photons holds tremendous for several aspects quantum information science, e.g., optical control and readout qubits. In context, direct observation phenomenon via spin-sensitive spectroscopies utmost importance to establish future guidelines photo-driven spin selectivity structures. Here, we provide proof time-resolved electron...