Autor: Hofmann, E. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Fluorescence Mapping of PCP Light-Harvesting Complexes Coupled to Silver Nanowires
Autorzy:: Krajnik, B.
Piatkowski, D.
Olejnik, M.
Czechowski, N.
Hofmann, E.
Heiss, W.
Mackowski, S.
Tematy:: 87.64.kv
42.62.Fi
81.07.Pr
87.64.M-; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1419489.pdf Link otwiera się w nowym oknie
Opis:: In this work we demonstrate confocal fluorescence imaging of hybrid nanostructures composed of silver nanowires and peridinin-chlorophyll-protein light-harvesting complexes. The length of silver nanowires, which reaches 10 μm, allows for determination of the nanowire position and consequently direct correlation with the fluorescence image. In this way we probe the influence of plasmon induced electromagnetic field on the fluorescence of light-harvesting complexes. When the nanowires are spaced from the light-harvesting complexes by a 10 nm thick dielectric layer, we observe a fluorescence enhancement, which depends upon the laser excitation wavelength. The measured enhancement values are 2.5 and 1.9 for 405 nm and 485 nm, respectively. Larger enhancement for the 405 nm excitation is attributed to direct creation of plasmon excitations in the silver nanowires.
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Influence of Plasmon Resonance in Silver Island Film on the Optical Properties of Peridinin-Chlorophyll-Protein Light-Harvesting Complexes
Autorzy:: Ciszak, K.
Olejnik, M.
Strzelecki, J.
Krajnik, B.
Piątkowski, D.
Hofmann, E.
Mackowski, S.
Tematy:: 33.50.Dq
73.20.Mf
87.15.M-
81.07.Pr; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1419506.pdf Link otwiera się w nowym oknie
Opis:: We study the effect of plasmon excitations in silver island film on the optical properties of peridinin-chlorophyll-protein light-harvesting complex using scanning fluorescence microscopy. With this technique we can unambiguously locate areas where the biomolecules are deposited on the metallic nanostructures from the areas where they stick to the glass surface. The enhancement factor of fluorescence intensity obtained for such a hybrid nanostructure is found to be 3. Plasmon excitations in the SIF layer also influence the dynamics of the emission, but in this case the interpretation of the results is more complex.
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Plasmon Enhancement of Fluorescence in Single Light-Harvesting Complexes from em Amphidinium carterae
Autorzy:: Bujak, Ł.
Piątkowski, D.
Mackowski, S.
Wörmke, S.
Jung, C.
Bräuchle, C.
Agarwal, A.
Kotov, N.
Schulte, T.
Hofmann, E.
Brotosudarmo, T.
Scheer, H.
Govorov, A.
Hiller, R.
Tematy:: 87.80.Nj
87.14.E-
87.64.M-; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1807594.pdf Link otwiera się w nowym oknie
Opis:: We show that single peridinin-chlorophyll a-protein light-harvesting complexes from dinoflagellate Amphidinium carterae placed near to silver nanoparticles show strongly enhanced fluorescence emission. Single molecule spectroscopy experiments performed at room temperature point toward an enhancement of more than an order of magnitude for optimal conditions. Irrespective of the enhancement, we observe no effect of the metal nanoparticle on the fluorescence emission energy of the complex. This result provides a way to control the optical properties of biomolecules via plasmon excitations in metal nanoparticles.
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Comparisons of population demography of Microtus ochrogaster and M. pennsylvanicus
Autorzy:: Cole, F. R.
Getz, L. L.
Verner, L.
Avalos, D. E.
Hofmann, J. E.
Powiązania:: Acta Theriologica
Opis:: Demography of two population cycles of Microtus ochrogaster and one of M. pennsylvanicus were compared in alfalfa, bluegrass and tall grass prairie habitats in east-central Illinois, 1972-1976.
Dostawca treści:: RCIN - Repozytorium Cyfrowe Instytutów Naukowych

Książka

Skocz do pozycji: 5.

Tytuł:: Early Iron Age kurgans from the North-Caucasus
Archaeologia Polona Vol. 53 (2015)
Autorzy:: Fassbinder, Jörg W.E.
Parzinge, Hermann
Hofmann, Ina
Belinskij, Andrei B.
Gass, Anton
Wydawca:: Institute of Archaeology and Ethnology Polish Academy of Sciences
Powiązania:: Gorka, T., Fassbinder, J.W.E. 2011. Classification and documentation of Kurgans by magnetometry. In M. G. Drahor and M.A. Berge (eds.), Archaeological Prospection, Extended Abstracts, 9th International Conference on Archaeological Prospection, 2011 Izmir, Turkey, Izmir, 183-186
Archaeologia Polona
Fassbinder, J.W.E., Górka, T., Parzinger, H. and Nagler, A. 2009. Magnetic prospecting of Scythian Kurgans from Chilik, Southeastern Kazakhstan, ArcheoSciences, revue d’archéometrie, suppl. 33, 59-61
Gass, A. 2011. Early Iron Age Burials in Southeastern Zhetysu: The Geoarchaeological Evidence Archaeology, Ethnology and Anthropology of Eurasia 39, 57-69
Opis:: il. ; 24 cm
ill. ; 24 cm
Dostawca treści:: RCIN - Repozytorium Cyfrowe Instytutów Naukowych

Inne

Skocz do pozycji: 6.

Tytuł:: Magnetic Behaviour and Electronic Structure of the R$\text{}_{2}$PdSi$\text{}_{3}$ (R = Ce, Nd, Tb-Er) Compounds
Autorzy:: Szytuła, A.
Hofmann, M.
Penc, B.
Ślaski, M.
Majumdar, Subham
Sampathkumaran, E. V.
Zygmunt, A.
Tematy:: 71.20.-b
75.30.Cr
75.30.Kz
79.60.-i; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/2013678.pdf Link otwiera się w nowym oknie
Opis:: The magnetic properties including the magnetic structure were determined by magnetometric and neutron diffraction measurements of the polycrystalline samples of R$\text{}_{2}$ PdSi$\text{}_{3}$ (R = Ce, Nd, Tb-Er). In Ce$\text{}_{2}$PdSi$\text{}_{3}$ the Ce moments order below 2.5 K. The Nd magnetic moments in Nd$\text{}_{2}$PdSi$\text{}_{3}$ exhibit ferromagnetic ordering below 17 K. In Tb$\text{}_{2}$PdSi$\text{}_{3}$, a complex situation is observed: in the temperature range from 1.5 K to (T$\text{}_{N}$=25 K), there is a coexistence of a ferromagnetic spiral (about 75% of the magnetic moment) and a spin-glass (about 25%). For the Dy, Ho, and Er compounds, below T$\text{}_{N}$ (7.5, 8, and 7 K respectively), sinusoidally modulated structures are observed. The valence band and the core level photoemissions of 4d of rare-earth metal, 3d Pd, 2s and 2p Si were investigated by X-ray photoemission spectroscopy measurements.
Dostawca treści:: Biblioteka Nauki