Institut de Nanociència i Nanotecnologia (IN2UB): Recent submissions
Now showing items 261-280 of 375
Probing the Spontaneous Emission Dynamics in Si-Nanocrystals-Based Microdisk Resonators
As a possible cavity quantum electrodynamical system, unlike III-V quantum dots, Si-NCs are not considered ideal emitters for emission rate enhancement observations (Purcell effect). Here, we report on direct measurements ...
Manipulation of competing ferromagnetic and antiferromagnetic domains in exchange biased nanostructures
Using photoemission electron microscopy combined with x-ray magnetic circular dichroism we show that a progressive spatial confinement of a ferromagnet (FM), either through thickness variation or laterally via patterning, ...
Innovative strategies to treat skin wounds with mangiferin: fabrication of transferosomes modified with glycols and mucin
im: The moisturizing properties of glycerol, the penetration enhancing capability of propylene glycol and the bioadhesive properties of mucin were combined to improve the carrier capabilities of transfersomes and the ...
Nonideal optical response of liquid crystal variable retarders and its impact on their performance as polarization modulators
Liquid crystal variable retarders (LCVRs) will be used for the first time in a space instrument, the Solar Orbiter mission of the European Space Agency, as polarization states analyzers (PSAs). These devices will determine ...
Front microrheology of the non-Newtonian behavior of blood: scaling theory of erythrocyte aggregation by aging
We introduce a new framework to study the non-Newtonian behaviour of fluids at the microscale based on the analysis of front advancement. We apply this methodology to study the non-linear rheology of blood in microchannels. ...
The combined use of gold nanoparticles and infrared radiation enables cytosolic protein delivery
Cytosolic protein delivery remains elusive. The inability of most proteins to cross the cellular membrane is a huge hurdle. Here we explore the unique photothermal properties of gold nanorods (AuNRs) to trigger cytosolic ...
Rapid quantification of 3D ultrasound fields with wavefront sensing and Schlieren tomography
The rapid and precise characterization of three-dimensional (3D) pressure fields inside water is paramount for ultrasound (US) applications in fields as relevant as biomedicine and acoustic trapping. The most conventional ...
Electrodeposition of nanostructured Bi2MoO6@Bi2MoO6-x homojunction films for the enhanced visible-light-driven photocatalytic degradation of antibiotics
Complex tunable visible-light-driven Aurivillius-phase-based micro- and nanostructured photocatalysts were fabricated following a novel, scalable, easily implemented sequential process based on electrochemical deposition ...
Effect of a Balanced Concentration of Hydrogen on Graphene CVD Growth
The extraordinary properties of graphene make it one of the most interesting materials for future applications. Chemical vapor deposition (CVD) is the syntheticmethod that permits obtaining large areas ofmonolayer graphene. ...
Metal-based nanoparticles as antimicrobial agents: an overview.
Metal-based nanoparticles have been extensively investigated for a set of biomedical applications. According to the World Health Organization, in addition to their reduced size and selectivity for bacteria, metal-based ...
Phosphatidylserine-Liposomes promote tolerogenic features on dendritic cells in human type 1 diabetes by apoptotic mimicry
Type 1 diabetes (T1D) is a metabolic disease caused by the autoimmune destruction of insulin-producing β-cells. With its incidence increasing worldwide, to find a safe approach to permanently cease autoimmunity and allow ...
Resonant and Off-Resonant Magnetoacoustic Waves in Epitaxial Fe3Si/GaAs Hybrid Structures
Surface acoustic waves (SAWs) provide an efficient dynamical coupling between strain and magnetization in micro- and nanometric systems. Using a hybrid device composed of a piezoelectric, GaAs, and a ferromagnetic Heusler ...
Laser-induced forward transfer for manufacture of graphite-based heaters on flexible substrate
Flexible heaters have recently gained considerable interest owing to their ability to be integrated into a wide variety of miniaturized devices. They are used to perform thermal management, strain engineering, and even ...
Synthesis and in vitro phototoxicity of multifunctional Zn(II)meso-tetrakis(4-carboxyphenyl)porphyrin-coated gold nanoparticles assembled via axial coordination with imidazole ligands
Hypothesis: Metalloporphyrins are extensively investigated for their ability to form reactive oxygen species and as potent photosensitisers for use in photodynamic therapy. However, their hydrophobicity generally causes ...
Probing active nematics with in situ microfabricated elastic inclusions
In this work, we report a direct measurement of the forces exerted by a tubulin/kinesin active nematic gel as well as its complete rheological characterization, including the quantification of its shear viscosity, η, and ...
Temperature-dependent elastic properties of DNA
Knowledge of the elastic properties, e.g., the persistence length or interphosphate distance, of single-stranded (ss) and double-stranded (ds) DNA under different experimental conditions is critical to characterizing ...
Localization and Directionality of SurfaceTransport in Bi2Te3 Ordered 3D Nanonetworks
The resistance of an ordered 3D-Bi2Te3 nanowire nanonetwork was studied at low temperatures. Below 50 K the increase in resistance was found to be compatible with the Anderson model for localization, considering that ...
Injection locking in an optomechanical coherent phonon source
Spontaneous locking of the phase of a coherent phonon source to an external reference is demonstrated in a deeply sideband-unresolved optomechanical system. The high-amplitude mechanical oscillations are driven by the ...
Modulation of the electroluminescence emission from ZnO/Si NCs/p-Si light-emitting devices via pulsed excitation
In this work, the electroluminescence (EL) emission of zinc oxide (ZnO)/Si nanocrystals (NCs)-based light-emitting devices was studied under pulsed electrical excitation. Both Si NCs and deep-level ZnO defects were found ...
Self-sustained deformable rotating liquid He cylinders: the pure normal fluid 3He and superfluid 4He cases
Within density functional theory, we have studied self-sustained, deformable, rotating liquid He cylinders subject to planar deformations. In the normal fluid 3He case, the kinetic energy has been incorporated in a ...
