Zobrazeno 1 - 10
of 168
pro vyhledávání: '"T.J. Schaafsma"'
Publikováno v:
Applied Surface Science. 93:291-299
Porphyrin organic dye layers on oxidic surfaces may play a key role in the light absorption and charge separation of organic solar cells. We report a study of the adsorption characteristics of positively charged porphyrins from an aqueous solution on
Autor:
Tom J. Savenije, T.J. Schaafsma, S. J. Roosendaal, Ruud E. I. Schropp, F.H.P.M. Habraken, C. H. M. Marée
Publikováno v:
Journal of Applied Physics 80 (1996)
Journal of Applied Physics, 80, 3381-3389
Journal of Applied Physics, 80, 3381-3389
Electropolymerized porphyrin films on indium–tin–oxide substrates have been characterized using Rutherford backscattering spectrometry, absorption spectroscopy, electrical characterization methods and with step profiling. With these methods the d
Publikováno v:
Thin Solid Films, 265, 84-88
Thin Solid Films 265 (1995)
Thin Solid Films 265 (1995)
The deposition of a fourfold positively charged tetrakis(4-methyl pyridinium) porphyrin (H2TMPyP) and its metal derivatives on glass surfaces from basic aqueous solutions has been studied by optical and ion beam techniques. Upon exposure to a buffere
Publikováno v:
Chemical Physics Letters. 178:141-146
Forster-type energy transfer (ET) in solutions containing rhodamine 6G and zinc-tetraphenylporphyrin has been studied using zero-field optically detected magnetic resonance (ODMR). Transitions between the porphyrin triplet sublevels monitored via the
Autor:
T.J. Schaafsma
Publikováno v:
Solar Energy Materials and Solar Cells 38 (1995)
Solar Energy Materials and Solar Cells, 38, 349-351
Solar Energy Materials and Solar Cells, 38, 349-351
We have systematically investigated the factors determining the performance of organic solar cells of the porphyrin sandwich type, both with flat as well as structured (semiconductor) substrates.
Autor:
V.A. Galievski, T.J. Schaafsma, A. Hoek, V.L. Malinovski, I.V. Sazanovich, Vladimir S. Chirvony, Dewey Holten
Publikováno v:
The Journal of Physical Chemistry Part B: Condensed Matter, Materials, Surfaces, Interfaces & Biophysical, 105(32), 7818-7829
The Journal of Physical Chemistry Part B: Condensed Matter, Materials, Surfaces, Interfaces & Biophysical 105 (2001) 32
The Journal of Physical Chemistry Part B: Condensed Matter, Materials, Surfaces, Interfaces & Biophysical 105 (2001) 32
Ground- and excited-state absorption and fluorescence properties of three free base porphyrins with graded degrees of a macrocycle distortion have been studied. The different degrees of nonplanarity were introduced by successive addition of ethyl gro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a8bfc1e8c7c1b1c979f1e0fbd939ed1
https://research.wur.nl/en/publications/photophysical-and-structural-properties-of-saddle-shaped-free-bas
https://research.wur.nl/en/publications/photophysical-and-structural-properties-of-saddle-shaped-free-bas
Autor:
M.W. Polm, T.J. Schaafsma
Publikováno v:
Biophysical Journal, 72, 373-382
Biophysical Journal 72 (1997)
Biophysical Journal 72 (1997)
Fluorescence detected magnetic resonance (FDMR) spectra detected at 596 nm of zinc-substituted hemoglobins at 4.2 K show a split D-E transition, which is not observed for zinc protoporphyrins ligated by methylimidazole in glasses. Incorporation of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c317c9e75e8f1387a311267ed911748
https://research.wur.nl/en/publications/triplet-state-magnetic-resonance-and-fluorescence-spectroscopy-of
https://research.wur.nl/en/publications/triplet-state-magnetic-resonance-and-fluorescence-spectroscopy-of
Publikováno v:
Thin Solid Films 279 (1996)
Thin Solid Films, 279, 87-92
Thin Solid Films, 279, 87-92
Free base methyl pyridinium porphyrins were adsorbed on microscope glass slides, quartz plates or silicon wafers from a borate buffer solution at pH 10. Adsorption of the porphyrins is strongly enhanced by electrostatic interaction of the positively
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b31d2862b5df1647bd6336042a83592
https://research.wur.nl/en/publications/adsorption-of-oriented-methyl-pyridinium-porphyrins-on-solid-subs
https://research.wur.nl/en/publications/adsorption-of-oriented-methyl-pyridinium-porphyrins-on-solid-subs
Autor:
T.J. Schaafsma, Peter Gast, J. J. Semlyen, Arnold J. Hoff, D. J. Riley, P. J. Hore, D.A. Hunter, F.G.H. van Wijk
Publikováno v:
Research on chemical intermediates, 16, 127-139
Research on chemical intermediates 16 (1991)
Research on Chemical Intermediates, 16(2), 127-139. SPRINGER
Research on chemical intermediates 16 (1991)
Research on Chemical Intermediates, 16(2), 127-139. SPRINGER
It is shown that electron spin polarization can be used to probe the anisotropy of singlet-triplet interconversion of radical pairs involved in photosynthetic charge separation. Anisotropic polarization may be observed with non-oriented reaction cent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9495e9ff911f62043adb63cf603a3324
https://doi.org/10.1163/156856791x00219
https://doi.org/10.1163/156856791x00219
Publikováno v:
Journal of Luminescence 72 (1997) 74
Journal of Luminescence, 72(74), 81-82
Journal of Luminescence, 72(74), 81-82
Charge carrier photogeneration in solid porphyrin films was investigated using optical and photocurrent action spectroscopy. In electropolymerized DA porphyrin films on ITO, acting as photo diodes, unidirectional charge separation occurs within inter