4,993 results match your criteria: "⊥CNR-Nano Institute of Nanoscience[Affiliation]"

Focusing of mid-infrared polaritons through patterned graphene on van der Waals crystals.

Nanophotonics

July 2024

Department of Physics and Graduate Institute of Nanoscience, National Chung Hsing University, 145 Xingda Rd., Taichung, 40227, Taiwan.

Article Synopsis
  • Manipulating mid-infrared light is essential for various applications like optical imaging and biosensing, but challenges in metamaterial fabrication and optical losses have hindered advancements.
  • This research focuses on using a biaxial two-dimensional van der Waals material, molybdenum trioxide, combined with patterned graphene to improve the control and focusing of mid-IR light through negative refraction.
  • The findings demonstrate that the proposed method can significantly enhance beam quality and intensity, reduce beam waist diameter, and enable precise directional guidance, paving the way for innovative uses in planar photonics.
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A one-step fabrication of soft-magnetic high entropy alloy fiber with excellent strength and flexibility.

Nat Commun

December 2024

CAS Key Laboratory of Magnetic Materials and Devices, Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, China.

Soft-magnetic fibers (SMFs) play a crucial role in energy conversion, transmission, and storage within electronic devices. However, conventional SMFs have poor plasticity and are therefore difficult to withstand long-term tensile, torsional, and shear deformation. A high fraction of grain boundaries could improve plastic deformability of conventional SMFs, but deteriorates the coercivity.

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Αfter the impressive evolution of graphene and its derivatives, a large number of two dimensional (2D) materials with important optical and electrical properties have been successfully fabricated. Liquid phase exfoliation (LPE) of layered and non-layered materials has become a widely applied method for the preparation of 2D nanostructures with an extensive variety of applications. However, in most cases organic solvents are used as liquid phase which are often toxic and environmentally unfriendly and lead to low yields.

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Microneedles are mainly used for pain-free drug administration and in biosensing for wearable systems. They are also promising for fields such as agronomy for precision farming, but their fabrication is not straightforward, often requiring expensive equipment and cleanroom protocols, being unsuitable for mass production. Here, we report a new and simple method for the scalable fabrication of all-inkjet-printed conductive microneedles based on silver nanoparticles (extensible to any other metallic nanoparticle ink) and a simple example of their application for monitoring the electrochemical properties of plants.

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Interface Engineering in All-Oxide Photovoltaic Devices Based on Photoferroelectric BiFeCoO Thin Films.

ACS Appl Electron Mater

November 2024

Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, Bellaterra 08193, Spain.

Article Synopsis
  • Photoferroelectric BiFeO (BFO) is a lead-free material being studied for use in thin film photovoltaic devices, but its efficiency remains low despite ongoing improvements in device architecture.
  • This research investigates how adding a ZnO layer to a BiFeCoO (BFCO) heterostructure affects its ferroelectric and photoresponse properties, revealing a significant increase in short circuit current when compared to devices without ZnO.
  • Findings indicate that the enhanced performance is due to better band energy alignment at the ZnO/BFCO interface, which minimizes charge recombination, highlighting ZnO's potential in improving the functionality of BFO-based optoelectronic devices.
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Purpose: It is well known that the nonsteroidal anti-inflammatory drug (NSAID) indomethacin (IND) exhibits significant anticancer potential reported not only by in vitro and in vivo studies, but also in clinical trials. Despite promising results, IND is not widely used as an adjunctive agent in cancer therapy due to the occurrence of several gastrointestinal side effects, primarily after oral administration. Therefore, this study aimed to develop a nanosystem with reduced toxicity and risk of side effects for the delivery of IND for cancer treatment.

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A relatively unexplored approach in heterometallic chemistry of transition metals and lanthanides has been developed toward the controlled synthesis of a new family of linear heterotrinuclear Ln(III)-Pd(II)-Ln(III) complexes with the general formula [LnPd(pao)(NO)(MeOH)(HO)]·[Pd(pao)], where Ln = Dy (2), Gd (3), Er (4) and Yb (5). This strategy was based on the diamagnetic 'metalloligand' [Pd(pao)] (1), where pao is the anion of 2-pyridinealdoxime, containing two dangling oximate O-atoms which were to each other and available for binding with oxophilic lanthanide ions. Because of their -configuration, the [Pd(pao)] 'metalloligand' was able to direct the binding of two {Ln(NO)(MeOH)(HO)} units on opposite sites, thus yielding the reported trinuclear {Ln-Pd-Ln} clusters.

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EB3-informed dynamics of the microtubule stabilizing cap during stalled growth.

Biophys J

January 2025

Department of Bionanoscience, Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Delft, the Netherlands. Electronic address:

Article Synopsis
  • Investigates how microtubule growth and stability are affected by a stabilizing GTP/GDP-Pi cap using in vitro experiments with microfabricated barriers and GFP-EB3 as a marker.
  • The study reveals that obstacles slow down microtubule growth and increase the likelihood of catastrophes (rapid depolymerization).
  • A simple 1D model can effectively describe the lifetimes of both stalled and freely growing microtubules, linking hydrolysis rates to their growth dynamics and explaining previous observations on catastrophe rates.
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This research utilized tetraethylenepentamine-functionalized HY cubic zeolite as an adsorbent to effectively remove heavy metals from aqueous solutions. The adsorbent was characterized using FT-IR, XRD, TGA, FE-SEM, and EDS-MAP techniques. The synthesis aimed to optimize and evaluate the removal efficiency of Pb(II), Cr(III), Co(II), and Cu(II) from aqueous solutions by investigating key parameters, including initial pH, concentration, adsorbent dosage, and contact time.

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Highly Flexible and Compressible 3D Interconnected Graphene Foam for Sensitive Pressure Detection.

Micromachines (Basel)

November 2024

State Key Laboratory of Mechanics and Control for Aerospace Structures, Key Laboratory for Intelligent Nano Materials and Devices of Ministry of Education, Institute of Nanoscience and College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.

Article Synopsis
  • A new flexible pressure sensor made from multi-scale 3D graphene is designed to detect forces on soft surfaces, useful in fields like health monitoring and AI.
  • It has impressive sensitivity levels, measuring as low as 0.42 kPa in low-pressure situations and 0.012 kPa in higher-pressure ranges.
  • The sensor is also quick to respond (62 ms) and maintains stability over more than 10,000 cycles, allowing it to accurately sense things like water drops, airflow speed, and human movements.
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Carbon nanotube-Yttrium iron garnet (CNT-YIG) nanohybrid has been successfully synthesized using chemical vapor deposition (CVD) with yttrium iron garnet (YIG) nanopowders as catalyst, ethanol as carbon stock, and argon as carrier gas. Carbon nanotube (CNT) was observed to have grown from the YIG nanopowders with bamboo-like structures of CNT at a synthesis temperature of 900 °C. FESEM and RAMAN characterization indicated that the CNT-YIG nanohybrid exhibited the growth of bamboo-like CNT with high graphitization.

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A major step forward toward high-resolution nanopore sequencing of full-length proteins.

Mol Cell

November 2024

Department of Bionanoscience, Kavli Institute of Nanoscience, Delft University of Technology, Delft, the Netherlands; Department of Physics, Ewha Womans University, Seoul, Republic of Korea. Electronic address:

In a recent publication in Nature, Motone et al. report the development of a protein sequencing method using nanopores that enables the reading of long protein strands. This method allows for multi-pass re-reading and can detect single amino acid substitutions as well as post-translational modifications (PTMs).

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Active nematic coherence probed under spatial patterns of distributed activity.

Soft Matter

December 2024

Departament de Ciència de Materials i Química Física, Universitat de Barcelona, Barcelona, Spain.

Article Synopsis
  • The study focuses on a photoresponsive active nematic fluid composed of microtubules and driven by kinesin motors, examined under blue-light illumination in a two-dimensional interface.
  • Findings reveal that while uniform light conditions enhance active flows, spatially patterned activities disrupt the vorticity of the resulting flows.
  • The research highlights the significance of the active length scale in influencing the flow properties and material integrity of the system, aiming to improve control over this complex material.
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The electrochemical carbon dioxide reduction reaction (eCORR) using nitrogen-doped carbon (N-C) materials offers a promising and cost-effective approach to global carbon neutrality. Regulating the porosity of N-C materials can potentially increase the catalytic performance by suppressing the concurrence of the hydrogen evolution reaction (HER). However, the augmentation of porosity usually alters the active sites or the chemical composition of catalysts, resulting in intertwined influences of various structural factors and catalytic performance.

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Article Synopsis
  • Necrotic enteritis in poultry leads to poor growth and increased death rates, prompting researchers to explore dietary interventions.
  • A study tested the effects of quercetin-loaded magnetized nanoparticles on young broiler chickens, comparing different diets to assess their impact on growth and immune responses.
  • Results showed that the quercetin-loaded FeO-NPs significantly improved growth, enhanced intestinal immune functions, reduced harmful bacteria colonization, and restored oxidative balance in birds challenged with necrotic enteritis.
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Hot Carrier Cooling and Multiphoton Absorption of Quasi-Type II ZnSeTe-Based Quantum Dots.

Inorg Chem

December 2024

Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.

Ternary ZnSeTe quantum dots (QDs) are regarded as the most promising Cd-free blue emitters, while their fundamental optical properties such as hot carrier (HC) cooling process and multiphoton absorption (MPA) remain unclear, which will hinder their potential application. In this work, we compare the HC cooling processes of ZnSeTe/ZnSeS and ZnSeTe/ZnSeS/ZnS QDs and find that the HC cooling times of ZnSeTe/ZnSeS/ZnS QDs are insensitive to excitation intensity as a result of the suppressed hot-phonon bottleneck and Auger effect. Importantly, we have determined the two- to five-photon absorption cross sections of two kinds of QDs, highlighting the advantages of ZnS shells in enhancing MPA cross sections of ZnSeTe-based QDs.

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Article Synopsis
  • The study focuses on improving the efficiency of organic light-emitting diodes (OLEDs) by modifying the hole transport layer (HTL) with core-shell nanoparticles, specifically silver nanoparticles (Ag-NPs) embedded in a tungsten polyoxometalate compound (POM).
  • The research demonstrates that Ag-NPs enhance OLED performance through better hole injection, conductivity, and beneficial optical effects such as Localized Surface Plasmon Resonance (LSPR), thereby improving carrier balance and exciton recombination rates.
  • A comparative analysis with POM gold nanoparticles (POM-Au NPs) indicates that the POM-Ag NPs offer significant advantages, suggesting this innovative approach could
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Mechanoelectric sensitivity reveals destructive quantum interference in single-molecule junctions.

Nat Commun

November 2024

Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Madrid, E-28049, Spain.

Quantum interference plays an important role in charge transport through single-molecule junctions, even at room temperature. Of special interest is the measurement of the destructive quantum interference dip itself. Such measurements are especially demanding when performed in a continuous mode of operation.

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The conformational dynamics of the pyrene excimer play a critical role in its unique fluorescence properties. Yet, the influence of multiple local minima on its excited-state behavior remains underexplored. Using a combination of time-dependent density functional theory (TD-DFT) and unsupervised machine learning analysis, we have identified and characterized a diverse set of stable excimer geometries in the first excited state.

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Article Synopsis
  • The synthesis and stabilization of Pd nanoclusters on a support, while maintaining good catalytic performance, is difficult due to the need for specific surface ligands.
  • Using two different ligands (propylamine and propylthiol), the study found that Pd nanoclusters stabilized by aminopropyl groups showed significantly better catalytic activity (27 times higher) for dehydrogenating formic acid compared to those stabilized by thiopropyl groups at 70 °C.
  • Density functional calculations revealed that Pd-N bonds are weaker and less stable than Pd-S bonds, which are stronger but can cause structural issues for Pd clusters on thiol-functionalized surfaces, leading to decreased catalytic stability.
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Brain-computer interfaces (BCI) are promising for severe neurological conditions and there are ongoing efforts to develop state-of-the-art neural interfaces, hardware, and software tools. We tested the potential of novel reduced graphene oxide (rGO) electrodes implanted epidurally over the hind limb representation of the primary somatosensory (S1) cortex of rats, and compared them to commercial platinum-iridium (Pt-Ir) 16-channel electrodes (active site diameter: 25m).Motor and somatosensory information was decoded offline from microelectrocorticography (ECoG) signals recorded while unrestrained rats performed a simple behavioral task: pressing a lever and the subsequent vibrotactile stimulation of the glabrous skin at three displacement amplitude levels and at two sinusoidal frequencies.

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Probing Electrostatic Interactions in DNA-Bound CRISPR/Cas9 Complexes by Molecular Dynamics Simulations.

ACS Omega

November 2024

Departments of Physics and Astronomy and Quantitative and Computational Biology, University of Southern California, Los Angeles, California 90089, United States.

Engineered protein mutations may be exploited to tune molecular interactions in the cellular environment. Here, we have explored the structural consequences of different Cas9 mutations in genome-editing CRISPR/Cas9 systems by means of Molecular Dynamics simulations. We have characterized mutation-induced structural changes and their implications for changes in protein-DNA, DNA-RNA, and DNA-DNA interactions.

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Most commercial adhesives currently available pose significant environmental concerns due to the presence of contaminants such as volatile organic compounds (VOCs). To address this challenge, much research is being focused on developing water-based adhesives. Herein, we demonstrate that polymerisation of a natural polyphenolic compound (pyrogallol) with an amino-based ligand (tris(2-aminoethyl) amine) in water allowed for the development of a novel bioinspired water-based adhesive without involving VOCs.

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Thiophene-based monohelicene (), triple helicenes (), and hexapole helicenes () were synthesized via oxidative photocyclization and cascade Suzuki/intramolecular cyclization as the crucial steps. The enantiomers of , , and exhibited circularly polarized luminescence (CPL), and the luminescence dissymmetry factors () gradually increased from -5.1 × 10 to -2.

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