Publications by authors named "L S Wielunski"
Article Synopsis
- Using a highly sensitive fluorescence technique, researchers measured the energy conversion efficiency and electron transfer rates in photosystem II complexes attached to gold surfaces.
- Atomic force microscopy and Rutherford backscattering spectroscopy helped assess the structure and density of these complexes.
- Although the measured current density is lower than top organic photovoltaic cells, the results suggest potential improvements through better optical properties, electron transfer, and multilayer structures for future biomimetic applications.
One of the central challenges of nanoscience is fabrication of nanoscale structures with well-controlled architectures using planar thin-film technology. Herein, we report that ordered nanocheckerboards in ZnMnGaO4 films were grown epitaxially on single-crystal MgO substrates by utilizing a solid-state method of the phase separation-induced self-assembly. The films consist of two types of chemically distinct and regularly spaced nanorods with mutually coherent interfaces, approximately 4 x 4 x 750 nm3 in size and perfectly aligned along the film growth direction.
View Article and Find Full Text PDFSurface hardness changes induced by O-, Ca- or P-ion implantation into titanium.
Colloids Surf B Biointerfaces
December 2000
Titanium or titanium alloys are very attractive biomedical materials. Biocompatible elements of oxygen, calcium and phosphorus were implanted into titanium and changes of surface hardness were measured using an ultra micro indenter (UMIS-2000). A multiple load-partial unload procedure that can reveal a hardness versus depth profile was adopted.
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