Article
Materials Science, Paper & Wood
Krishna Kishor Dey, Manasi Ghosh
Summary: This study investigates how the nuclear spin dynamics of a polysaccharide are affected by its anionic side chain. The results show that the anionic side chain increases the spin-lattice relaxation rate and local correlation time of the polysaccharide, leading to enhanced solubility and hydration compared to cellulose.
Article
Multidisciplinary Sciences
Alessandro Lunghi
Summary: Spin-phonon coupling plays a crucial role in spin relaxation and decoherence in solid-state semiconductors. This study combines advanced electronic structure methods with time-local master equations to predict spin-phonon relaxation times in various solid-state coordination compounds, demonstrating the feasibility of an accurate and fully ab initio implementation of spin relaxation theory.
Article
Materials Science, Multidisciplinary
M. Pregelj, A. Zorko, D. Arcon, M. Klanjsek, N. Jansa, P. Jeglic, O. Zaharko, S. Kraemer, M. Horvatic, A. Prokofiev
Summary: In this study, a comprehensive investigation of β-TeVO4 using nuclear magnetic resonance technique reveals the dynamic nature of spin-density-wave (SDW) and spin-stripe phases in this material. In the high-field phase, the arrangement of magnetic moments is similar to that of the SDW phase, possibly stabilized by magnetic anisotropy.
Article
Materials Science, Multidisciplinary
Marwan Deb, Elena Popova, Steffen Peer Zeuschner, Michel Hehn, Niels Keller, Stephane Mangin, Gregory Malinowski, Matias Bargheer
Summary: This paper investigates the magnetic, optical, and lattice responses of a Pt/Cu/Bi1Y2Fe5O12/Gd3Ga5O12 heterostructure to femtosecond laser excitation, revealing the generation of high-frequency standing spin waves in the dielectric Bi1Y2Fe5O12 layer through phonon-induced change of magnetic anisotropy. It is found that incoherent phonons can lead to both fast and slow decreases of magnetic order through different spin-phonon interaction scenarios.
Article
Physics, Multidisciplinary
Jinsoo Park, Jin-Jian Zhou, Yao Luo, Marco Bernardi
Summary: Developing a microscopic understanding of spin decoherence is crucial for advancing quantum technologies. In this study, the authors present a computational approach that unifies the modeling of two main sources of phonon-induced spin decoherence and enables accurate predictions of spin relaxation and precession in semiconductors. Their findings highlight the significant role of vertex correction in the electron spin dynamics in solids, providing insights for the development of spin-based quantum technologies.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Peter Millington-Hotze, Santanu Manna, Saimon F. Covre da Silva, Armando Rastelli, Evgeny A. Chekhovich
Summary: The spin diffusion in inhomogeneously polarized many-body systems, such as nuclear spin lattices, is described classically by the spin diffusion concept. In this study, the authors directly observed spin diffusion in a single GaAs/AlGaAs quantum dot through oscillatory spin relaxation dynamics and found that electron spin accelerates nuclear spin relaxation, challenging the previously proposed Knight-field-gradient diffusion barrier concept. The findings have significant implications for understanding nuclear spin diffusion in quantum dots.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Z. Wang, L. Balembois, M. Rancic, E. Billaud, M. Le Dantec, A. Ferrier, P. Goldner, S. Bertaina, T. Chaneliere, D. Esteve, D. Vion, P. Bertet, E. Flurin
Summary: Electron spin resonance spectroscopy is the preferred method for characterizing paramagnetic impurities, but it only provides ensemble-averaged quantities due to limited signal-to-noise ratio. To achieve single-electron spin sensitivity, we use spin fluorescence detection method and a microwave photon counter at millikelvin temperatures. By coupling individual paramagnetic erbium ions in a scheelite crystal to a high-quality-factor planar superconducting resonator to enhance their radiative decay rate, we obtain a fluorescence signal with a signal-to-noise ratio of 1.9 in one second integration time. This method has the potential for single-spin detection in a volume as large as the resonator magnetic mode volume, making it orders of magnitude larger than other single-spin detection techniques.
Article
Materials Science, Multidisciplinary
K. Y. Zeng, F. Y. Song, Z. M. Tian, Qiao Chen, Shun Wang, Bo Liu, Shiliang Li, L. S. Ling, W. Tong, Long Ma, Li Pi
Summary: A local probe investigation was conducted on the frustrated antiferromagnet Pr3BWO9 with a distorted kagome lattice, revealing the presence of an unconventional persistent fluctuating paramagnetic ground state and antiferromagnetic collective spin excitations.
Article
Physics, Multidisciplinary
William Beatrez, Arjun Pillai, Otto Janes, Dieter Suter, Ashok Ajoy
Summary: We report on experiments that quantify the role of a central electronic spin as a relaxation source for nuclear spins in its nanoscale environment. Our strategy exploits hyperpolarization injection from the electron as a means to controllably probe an increasing number of nuclear spins in the bath and subsequently interrogate them with high fidelity. These results suggest interesting new means to spatially discriminate nuclear spins in a nanoscale environment and have direct relevance to dynamic nuclear polarization and quantum sensors and memories constructed from hyperpolarized nuclei.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
P. Prelovsek, M. Gomilsek, T. Arh, A. Zorko
Summary: This study presents an in-depth analysis of temperature-dependent dynamical spin correlations in the antiferromagnetic Heisenberg spin-1/2 model on the kagome lattice with additional interactions. The research shows that introducing additional interactions leads to an anisotropic dynamical response and affects the in-plane spin fluctuations, ultimately leading to the onset of a coplanar AFM ground state order. The results are in good agreement with experimental data on kagome AFM compounds, demonstrating the importance of dynamical spin correlations in understanding quantum spin liquids.
Article
Polymer Science
Lucia Calucci, Silvia Pizzanelli, Alessandro Mandoli, Artur Birczynski, Zdzislaw T. Lalowicz, Cristina De Monte, Lucia Ricci, Simona Bronco
Summary: Polyvinyl butyral (PVB) is an amorphous polymer used in various technological applications. Through solid state Nuclear Magnetic Resonance (NMR) methods, the dynamics of the main-chain and propyl side-chains of PVB were investigated, revealing a primary alpha-relaxation associated with the glass transition in the main-chain and a faster secondary relaxation in the side-chains. Additionally, the geometry and rate of motions of different groups in the side-chains were characterized below the glass transition temperature using H-2 NMR spectroscopy.
Article
Materials Science, Multidisciplinary
Hafsa Syed, Adam Kinos, Chunyan Shi, Lars Rippe, Stefan Kroll
Summary: Flip-flop processes due to magnetic dipole-dipole interaction between neighboring ions in doped crystals are a mechanism of relaxation between hyperfine levels. We present a microscopic model of flip-flop interactions between individual nuclear spins and calculate the rates in Pr3+:Y2SiO5. The rates slow down in an external magnetic field.
Article
Multidisciplinary Sciences
Quentin Stern, Samuel Francois Cousin, Frederic Mentink-Vigier, Arthur Cesar Pinon, Stuart James Elliott, Olivier Cala, Sami Jannin
Summary: Dynamic nuclear polarization is a widely used tool for enhancing the sensitivity of nuclear magnetic resonance spectroscopy and imaging, but its practical applicability is limited by the spin diffusion barrier, which hinders efficient polarization transfer between highly polarized nuclei and bulk nuclei.
Article
Chemistry, Inorganic & Nuclear
Fabio Santanni, Andrea Albino, Matteo Atzori, Davide Ranieri, Enrico Salvadori, Mario Chiesa, Alessandro Lunghi, Andrea Bencini, Lorenzo Sorace, Federico Totti, Roberta Sessoli
Summary: This study investigates the selection of molecular spin qubits with long coherence time T-m through a combination of theoretical and experimental methods, focusing on the effects of vibrational properties and nuclear spins of hydrogens on spin dynamics. The results show that removing hydrogens can enhance the performance of spin qubits.
INORGANIC CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Neil Robinson, Eric F. May, Michael L. Johns
Summary: Solid-fluid interactions are crucial for porous materials in various chemical processes, but the opaque nature of these systems hinders detailed characterization of interfacial phenomena. A low-magnetic-field two-dimensional H-1 nuclear spin relaxation measurement provides insights into adsorbate identity and interfacial dynamics, showcasing distinct relaxation responses correlated with adsorbate acidity. This approach offers a molecular-level perspective on interactions within optically opaque porous media.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Polymer Science
Francesca Nardelli, Lucia Calucci, Elisa Carignani, Silvia Borsacchi, Mattia Cettolin, Marco Arimondi, Luca Giannini, Marco Geppi, Francesca Martini
Summary: The characterization of the structural and dynamic properties of rubber networks cured at different temperatures and sulfur contents was studied using various NMR techniques. Correlations between NMR observables, crosslink density, torque values, and glass transition temperatures provided insights into the effects of vulcanization conditions on the polymer networks and the segmental dynamics of elastomers.
Article
Entomology
Panomir Tzenov, Silvia Cappellozza, Alessio Saviane
Summary: This paper describes the 16-years long activity of the Black Caspian Seas and Central Asia Silk Association, which was founded in 2005 to revive the sericultural activity in the region. The reasons for its establishment, internal organization, and actions to promote interaction among member countries are outlined. The history and recent activities of the association, as well as statistical data and project proposals, are presented. The SWOT analysis and future trends in sericulture are also discussed.
Article
Chemistry, Physical
Matteo Vanni, Giacomo Provinciali, Fuencisla Delgado Calvo, Elisa Carignani, Sebastien Dreyfuss, Nicolas Mezailles, Antonio Massimiliano Mio, Giuseppe Nicotra, Stefano Caporali, Silvia Borsacchi, Maurizio Peruzzini, Maria Caporali
Summary: Binary ruthenium-phosphorus nanoparticles with different Ru/P ratio were prepared using white phosphorus as the phosphorus source. The study of their morphology and structure revealed that these nanoparticles have a narrow size distribution and lack an ordered ruthenium phosphide lattice. The nanoparticles were found to be better described as a ruthenium-phosphorus alloy, and Ru2P exhibited higher catalytic activity and selectivity in the selective hydrogenation reaction compared to Ru(0) and RuP.
Review
Entomology
Domenico Giora, Giuditta Marchetti, Silvia Cappellozza, Alberto Assirelli, Alessio Saviane, Luigi Sartori, Francesco Marinello
Summary: This study analyzes the trends and outputs of scientific research on sericulture-related topics over the past two decades. The research shows that in addition to traditional sericulture themes, recent studies have focused on alternative products derived from sericulture, such as mulberry fruits and chemical compounds like antioxidants, phenolics, and flavonoids. Therefore, sericulture is an active and multidisciplinary research field.
Review
Entomology
Luca Tassoni, Silvia Cappellozza, Antonella Dalle Zotte, Simone Belluco, Pietro Antonelli, Filippo Marzoli, Alessio Saviane
Summary: This paper presents a systematic review of the nutrient composition of mulberry silkworm pupae. The review highlights the variability of data reported in the literature and identifies various factors that contribute to hindering a sound comparison of nutritional values. Future studies should report more variables to simplify data comparison.
Article
Construction & Building Technology
Rita Gelli, Monica Tonelli, Francesca Martini, Lucia Calucci, Silvia Borsacchi, Francesca Ridi
Summary: This study explores the concentration dependent retarding effect of borax on tri-magnesium phosphate-based cements for the first time. By investigating the hydration and phases formed in the set cements using multiple characterization techniques, it was found that borax slows down the hydration process, reduces heat release, and leads to the formation of struvite instead of newberyite, without affecting the strength of the cement. The observed boron species suggest that the retardation is caused by the complexation of NH4+ and Mg2+ ions with borate and polyborate anions.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Noemi Landi, Elena Maurina, Daniela Marongiu, Angelica Simbula, Silvia Borsacchi, Lucia Calucci, Michele Saba, Elisa Carignani, Marco Geppi
Summary: Mixed-cation lead mixed-halide perovskites, especially TripleMix, show higher efficiency and stability in perovskite-based photovoltaics. The structure and dynamics of TripleMix were investigated using multinuclear solid-state nuclear magnetic resonance (SSNMR), revealing slower dynamics of both organic cations and halide anions, which may contribute to its high photovoltaic performances.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Environmental Sciences
Domenico Giora, Alberto Assirelli, Silvia Cappellozza, Luigi Sartori, Alessio Saviane, Francesco Marinello, Jose A. Martinez-Casasnovas
Summary: This study investigates the possibility of using satellite imaging to monitor leaf harvesting in mulberry plants and relates quantitative parameters on silk cocoon production to vegetation indices analysis. The results show a correlation between the decrease in multispectral vegetation indices in the mulberry plots due to leaf harvesting and the quantitative parameters of silk cocoon production.
Review
Chemistry, Physical
Marie Juramy, Giulia Mollica
Summary: This paper reviews the recent progress of Nuclear Magnetic Resonance (NMR) in investigating crystallization processes. It discusses the use of in-situ and ex-situ strategies combining cryogenic conditions with dynamic nuclear polarization (DNP) NMR to study the formation of intermediate phases during crystallization. The increased temporal and structural resolution enabled the detection of previously elusive transient forms.
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Lucia Calucci, Silvia Borsacchi, Federica Balzano, Rachele Volpi, Duccio Tatini, Gloria Uccello Barretta, Pierandrea Lo Nostro, Marco Geppi
Summary: Sodium oleate self-aggregates in water to form rodlike micelles with different lengths, and the addition of KCl leads to the formation of wormlike micelles that create a viscoelastic dispersion. The shape and size of the aggregates affect the fluctuations of the local order director. The study provides quantitative information on various molecular motions and collective dynamics of the aggregates.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Andrea Scarperi, Noemi Landi, Alessio Gabbani, Nabila Jarmouni, Silvia Borsacchi, Lucia Calucci, Andrea Pucci, Elisa Carignani, Francesco Pineider, Marco Geppi
Summary: Cesium lead bromide perovskite (CsPbBr3) cubic nanocrystals were obtained by colloidal synthesis and characterized using multinuclear Solid State NMR (SSNMR), X-Ray Diffraction (XRD), Transmission Electron Microscopy (TEM), and optical spectroscopy. The different components of the nanocubes were studied separately by NMR, which also investigated the surface ligands and their interactions. The structural investigation of the perovskite nanocubes was addressed by exploiting spectral properties using Pb-207 and Cs-133 nuclei.
PURE AND APPLIED CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Silvia Pizzanelli, Lucia Calucci, Claudia Forte, Silvia Borsacchi
Summary: Composting, vermicomposting, and anaerobic digestion are commonly used methods to convert organic waste into valuable soil amendment products. C-13 solid-state Nuclear Magnetic Resonance (SSNMR) has been applied to track the transformation of organic matter and evaluate the quality of the produced amendments and the effectiveness of the treatments.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Florian Ferrer, Marie Juramy, Ribal Jabbour, Samuel Cousin, Fabio Ziarelli, Giulia Mollica, Pierre Thureau, Stephane Viel
Summary: Dynamic nuclear polarization can significantly improve the sensitivity of magic-angle spinning solid-state NMR experiments. The use of a glycerol-based DNP solution is common to prevent phase separation of the paramagnetic polarizing agents. However, this study demonstrates that high H-1 DNP enhancements can also be achieved in water without glycerol by adding high concentrations of electrolytes, which disrupt ice crystallization and restore DNP efficiency.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Samuel F. Cousin, Colan E. Hughes, Fabio Ziarelli, Stephane Viel, Giulia Mollica, Kenneth D. M. Harris, Arthur C. Pinon, Pierre Thureau
Summary: Solid-state DNP NMR can improve the detection of minor solid phases in heterogeneous materials. We demonstrated the use of NMR contrast based on DNP-enhanced polarization transport for the early detection of a small amount of a minor polymorphic phase within a major polymorph. We also showed that this approach allows for quantitative information on the spatial distribution of the two polymorphs.
Article
Biochemistry & Molecular Biology
Lucia Marchetti, Eleonora Truzzi, Ilaria Frosi, Adele Papetti, Silvia Cappellozza, Alessio Saviane, Federica Pellati, Davide Bertelli
Summary: There is a growing need for new options to treat diabetes at an early stage, and natural remedies have recently been reconsidered as potential candidates due to their low cost and effectiveness. Genus Morus plants contain active compounds with hypoglycaemic, hypolipidemic, and antioxidant effects. Current research on mulberry plants has mainly focused on Asian cultivation, where it has traditionally been used as a leaf infusion. This study characterised twelve Italian mulberry cultivars to expand our knowledge, and the results suggest a strong correlation between composition, genetics, and growing area. Leaf extracts showed inhibitory effects on carbohydrate digestive enzymes, likely due to the presence of 1-deoxynojirimycin, kaempferol, quercetin, and chlorogenic acid, acting synergistically. Additionally, the extracts exhibited antiglycative and carbonyl trapping capacities, potentially preventing long-term complications in diabetic patients related to advanced glycation end products (AGEs).
