Ion-induced elongation of gold nanoparticles in silica by irradiation with Ag and Cu swift heavy ions: track radius and energy loss threshold.

Systematic investigations of the energy loss threshold above which the irradiation-induced elongation of spherical Au nanoparticles occurs are reported. Silica films containing Au nanoparticles with average diameters of 15-80 nm embedded within a single plane were irradiated with 12-54 MeV Ag and 10-45 MeV Cu ions at 300 K and at normal incidence. We demonstrate that the efficiency of the ion-induced nanoparticle elongation increases linearly with the electronic energy transferred per ion track length unit from the energetic ions to the silica film.

In vitro degradation behavior of microspheres based on cross-linked dextran.

The aim of this study was to investigate the in vitro degradation of hydroxyl ethyl methacrylated dextran (dex-HEMA) microspheres. Dextran microspheres were incubated in phosphate buffer pH 7.4 at 37 degrees C, and the dry mass, mechanical strength, and chemical composition of the microspheres were monitored in time.

The in vitro behavior of as-prepared and pre-immersed RF-sputtered calcium phosphate thin films in a rat bone marrow cell model.

In this paper we focus on the behavior of radio frequency (RF)-sputtered calcium phosphate (CaP) thin films in a rat bone marrow (RBM) cell model. Two issues are addressed. Firstly, we benchmarked the in vitro cell behavior of these CaP coatings by comparing their proliferation, differentiation and mineralization behavior and the structure of the formed interface to similar coatings of alumina and titania.

Laser-induced crystallization of calcium phosphate coatings on polyethylene (PE).

Calcium phosphate (CaP) coatings are used for obtaining a desired biological response. Usually, CaP coatings on metallic substrates are crystallized by annealing at temperatures of at least 400-600 degrees C. For polymeric substrates, this annealing is not possible due to the low melting temperatures.

Surface characteristics of holmium-loaded poly(L-lactic acid) microspheres.

Radioactive holmium-166-loaded poly(L-lactic acid) microspheres (Ho-PLLA-MS) are promising systems for the treatment of liver malignancies. The surface characteristics of Ho-PLLA-MS before and after both neutron and gamma irradiation were investigated in order to get insight into their suspending behaviour and to identify suitable surfactants for clinical application of these systems. X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) were used for surface characterization.

Initial deposition of calcium phosphate ceramic on polyethylene and polydimethylsiloxane by rf magnetron sputtering deposition: the interface chemistry.

Calcium phosphate (CaP) coatings are well known for their bioactive nature. CaP coated polymeric materials can be used as implant material. For this, a strong adhesion between the coating and substrate is necessary.

Oxidation of iron: the relation between oxidation kinetics and oxide electronic structure.

The test of the validity of the Fromhold-Cook theory of metal oxidation for the O2/Fe system in the tunnel regime is impeded by the growth of a passivating Fe2+/Fe3+ double layer at T View Article and Find Full Text PDF