ES – Page 5 – TechConnect Briefs

Synthesis and characterization of Hyaluronan – Gold Nanoparticles: A nanostructured material for biomedical applications

Ramis-Castelltort M., Querol J., Ojea I., Catalan Institute of Nanotechnology (ICN), ES

Hyaluronan (HA) is a glycosaminoglycan with a number of biological roles, such as being a key structural component of extracellular matrix and an important mediator in the leukocyte adhesion and migration. HA is ubiquitous in [...]

Cytotoxicity of bare and PEGylated silica nanoparticles as potential gene-delivery vectors

Yagüe C., Saldaña L., Martin F., Arruebo M., Vilaboa N., Santamaria J., Universidad fe Zaragoza, ES

Silica and other inorganic carriers are one of the major groups used to transport drugs and bioactive molecules into cells. The others are viral carriers, organic cationic compounds and recombinant proteins. The use of mesoporous [...]

Magnetic Properties Of Iron-Filled Multiwalled Carbon Nanotubes

Aguiló-Aguayo N., García-Céspedes J., Pascual E., Bertran E., IN2UB, Universitat de Barcelona, ES

Magnetic properties of iron-filled multiwalled carbon nanotubes have been investigated. Hysteretic and temperature dependent magnetic responses reveal a superparamagnetic behaviour at temperatures below 150ºC. The saturation magnetization of the nanowires at 5K is found to [...]

Real time Crystallization of Nanoparticles Filled Natural Rubber Under Stretching

Carretero-González J., Verdejo R., Toki S., Hsiao B.S., Giannelis E.P., Lopez-Manchado M.A., Polymer Science and Technology Institute, ES

Polymer nanocomposites (PNCs) represent an alternative new class of materials compared to conventional filled polymers or polymer blends, as they can possess enhanced properties through nanoscale reinforcement.[1] A great deal of efforts have been devoted [...]

In-situ incorporation of Pd-MPTES complex in nanostructured silica

García Martínez J., Carrillo A.I., Linares N., University of Alicante, ES

Recently, we described a simple method to incorporate metal nanopaticles in porous materials by functionalization of nanoparticles with trialkoxysilanes. This strategy is based on three steps: first, the metal nanoparticles were produced by controlled reduction [...]

Emulsions as Templates for Nanostructured Materials

Solans C., Esquena J., Nolla J., CSIC, ES

The preparation of nanostructured materials by emulsion templating is of particular interest among the soft nanotechnology processes. The use of emulsions allows good control of size and morphology, mild reaction conditions and technological feasibility. This [...]

Optical properties of 2D nanoparticle arrays

Portal S., Vallvé M.A., Arteaga O., Ignes-Mullol J., Bertran E., FEMAN group, ES

The self-assembly of nanometric size particles in large area compact monolayers has recently attracted considerable interest in terms of the fabrication of new optical nanostructured devices of macroscopic dimensions. These nanometric arranged surfaces present a [...]

Introduction of Mesopority in Zeolites Using Nanoparticles Used as Hard Templates

García Martínez J., Carrillo A.I., Linares N., University of Alicante, ES

Herein we described a simple new strategy based on the synthesis of zeolites in the presence of inorganic nanoparticles used as hard templates. These nanoparticles can be conveniently removed by simple, inexpensive chemical treatment (usually [...]

Bimodal Macro- Mesoporous Silica Network

García Martínez J., Abellán G., Carrillo A.I., Linares N., University of Alicante, ES

Herein we described the synthesis of novel kind of silica materials prepared at room temperature in the presence of cationic surfactant, more specifically a quaternary amine (tallow tetraamine) to obtain silica-based materials with attractive properties, [...]

Fluorination effects on tribological characteristics of hydrogenated amorphous carbon thin films

Rubio-Roy M., Portal S., Polo M.C., Pascual E., Bertran E., Andújar J.L., Universitat de Barcelona, ES

Hydrogenated amorphous carbon (a C:H) films are good candidates for biomedical applications, requiring smooth surfaces, biocompatibility and singular tribological characteristics. The addition of elements to a C:H films, such as oxygen, silicon, fluorine or metals, [...]