Zobrazeno 1 - 10
of 113
pro vyhledávání: '"A.M. Vredenberg"'
Publikováno v:
Applied Surface Science. 253:1150-1153
The H2 storage material FeTi can be fully charged through a Ni coating in the course of hours. A mild activation, either by long H2 exposure at RT, or annealing in 35 mbar H2 at 150 °C, leads to a full uptake in minutes. The enhancement of the uptak
Publikováno v:
Applied Surface Science. 253:771-777
The kinetics of hydrogen uptake of thin films of FeTi deposited on Si substrates and covered with 20 nm Pd were studied. The films serve as a model system for powdered FeTi, with grains that are (partly) covered with Pd, which serves as a protection
Publikováno v:
Applied Surface Science. 246:183-192
Radio frequency (rf) magnetron sputtering of calcium phosphate (CaP) is a promising technique to apply thin bioactive films on bulk implant materials. In this paper the interaction is studied of thin (∼100 nm) CaP films with Ca/P ratios ranging fro
Publikováno v:
Surface & Coatings Technology, 184, 2-3, pp. 247-254
Surface & Coatings Technology, 184, 247-254
Surface & Coatings Technology, 184, 247-254
Calcium phosphate (CaP) ceramic coatings are often used on biomedical implants for its osteoinductive properties. In this work, the adhesion of r.f. magnetron sputter deposited CaP ceramic on PE and PTFE was studied by tensile and interface elongatio
Autor:
A.M. Vredenberg, John A. Jansen, Siwart J. Oldenburg, Arnoud W. Denier van der Gon, Edwin van der Wal, Joop G.C. Wolke
Publikováno v:
Key Engineering Materials, 240-242, 599-602. Trans Tech Publications
In this study ionic adsorption was investigated of Ca and PO4 from Simulated Body Fluids (SBFx) at the surface of a Radio Frequent sputtered calcium phosphate coating. The relation between adsorption and heterogeneous nucleation of calcium phosphate
Publikováno v:
Journal of Non-Crystalline Solids. 195:232-238
Extended X-ray absorption fine structure (EXAFS) and photoluminescence (PL) measurements were performed on Er-implanted silica as a function of concentration and annealing at 900°C for 30 min. Er was implanted at 5 MeV to form peaked concentration p
Autor:
Luke A. Sweatlock, Albert Polman, Bart J. Kooi, A.M. Vredenberg, J. J. Penninkhof, Harry A. Atwater, Stefan A. Maier
Publikováno v:
Applied Physics Letters, 83(20), 4137-4139
30 MeV Si ion beam irradiation of silica glass containing Ag nanocrystals causes alignment of Ag nanocrystals in arrays along the ion tracks. Optical transmission measurements show a large splitting of the surface plasmon resonance bands for polariza
Publikováno v:
Materials Science and Engineering: B. 19:281-284
Stoichiometric iron carbide layers have been fabricated using a two-step implantation process. First, carbon pre-implantation at 400 keV is performed at low substrate temperature (∼50 °C) to form a region with high carbon concentration. For a pre-
Autor:
N.E.J. Hunt, G. J. Zydzik, A.M. Vredenberg, P.C. Becker, Dale C. Jacobson, Erdmann Frederick Schubert, J. M. Poate
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 74:84-88
We have studied the spontaneous emission characteristics of MeV Er-implanted resonant Fabry-Perot microcavities. Such cavities consist of two Si/SiO 2 distributed Bragg reflectors, cladding an (implanted) SiO 2 active region which has a thickness of
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 71:445-450
The diffusivity of ion implanted Au in amorphous Pd40Ni40P20 has been measured. Rutherford-backscattering spectrometry was used to determine the Au concentration profile in the amorphous matrix. It is shown that the accuracy of Rutherford-backscatter