Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Sebastian Friede"'
Nanotubular J-Aggregates and Quantum Dots Coupled for Efficient Resonance Excitation Energy Transfer
Autor:
Jürgen P. Rabe, Sebastian Friede, Frank Polzer, Stefan Kirstein, Sergei Kühn, Egon Steeg, Yan Qiao, Holm Kirmse
Publikováno v:
ACS Nano. 9:1552-1560
Resonant coupling between distinct excitons in organic supramolecular assemblies and inorganic semiconductors is supposed to offer an approach to optoelectronic devices. Here, we report on colloidal nanohybrids consisting of self-assembled tubular J-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ddb24320c86d8db79ea2f5d7f718f5eb
https://doi.org/10.1021/nn506095g
https://doi.org/10.1021/nn506095g
Publikováno v:
SPIE Proceedings.
Waveguide (WG) architectures of 420-nm emitting InAlGaN/GaN diode lasers are analyzed by photoluminescence (PL) and photocurrent (PC) spectroscopy using a nearfield scanning optical microscope (NSOM) for excitation and detection. The measurements wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::92483e6224f60736a46f6498ff99288f
https://doi.org/10.1117/12.2249563
https://doi.org/10.1117/12.2249563
Publikováno v:
Chemical Physics Letters. 555:206-211
Hydrogen bonded diarylethene dimers are formed through a carboxylic acid ligand, as is evident from concentration dependent OH stretching infrared spectra. Dimer formation leads to a red shift, enhancement and broadening of OH stretching absorption c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e3660c3705d3249f2e05031d9e9c4c2
https://doi.org/10.1016/j.cplett.2012.11.012
https://doi.org/10.1016/j.cplett.2012.11.012
Autor:
Sebastian Friede, Jose-Maria Montenegro, Markus Ochs, Azhar Z. Abbasi, Wolfgang J. Parak, Tobias Niebling, Susana Carregal-Romero, Pilar Rivera Gil, Faheem Amin, Wolfram Heimbrodt
Publikováno v:
ACS Nano. 5:21-25
Multiplexed measurements of several analytes in parallel using analyte-sensitive organic fluorophores can be hampered by spectral overlap of the different fluorophores. The authors discuss how nanoparticles can help to overcome this problem. First, d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d106290027b49579e7d52a923b23828e
https://doi.org/10.1021/nn1034026
https://doi.org/10.1021/nn1034026
Autor:
Sebastian Friede, Sergei Kuehn, S. Blumstengel, Sergey Sadofev, Fritz Henneberger, Thomas Elsaesser
Publikováno v:
Physical Review B. 91
Excitons play a key role for the optoelectronic properties of hybrid systems. We apply near-field scanning optical microscopy (NSOM) with a $100\,\text{-nm}$ spatial resolution to study the photoluminescence of surface excitons (SX) in a $20\,\text{n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::62712c6eb1dfa7c9742f8b2fadc2c27b
https://doi.org/10.1103/physrevb.91.121415
https://doi.org/10.1103/physrevb.91.121415
Autor:
Sergey Sadofev, Thomas Elsaesser, Sergei Kuehn, Sebastian Friede, Fritz Henneberger, S. Blumstengel
Publikováno v:
CLEO: 2015.
Time-resolved near-field optical microsopy maps exciton transport in a hybrid system. Within the 100 ps photoluminescence lifetime, an equilibrium distribution of surface and bound excitons displays lateral diffusion on a 50 nm length scale.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57acea0bf23020f71c54a556f698d60a
https://doi.org/10.1364/cleo_qels.2015.fm2b.2
https://doi.org/10.1364/cleo_qels.2015.fm2b.2
Publikováno v:
Semiconductor Science and Technology. 31:115015
Waveguide (WG) architectures of 420 nm emitting InGaN/GaN diode lasers are analyzed by photoluminescence and photocurrent spectroscopy using a nearfield scanning optical microscope that scans along their front facets. The components of the 'optical a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::540e6193b8fa305129d4eaf968567d58
https://doi.org/10.1088/0268-1242/31/11/115015
https://doi.org/10.1088/0268-1242/31/11/115015
Autor:
Wolfram Heimbrodt, Christian Pfeiffer, Justin Jin-Ching Chen, Walter H. Chang, Kerstin Volz, Jose Maria Montenegro Martos, Benedikt Haas, Jana Hollmann, Wolfgang J. Parak, Sebastian Friede, Andreas Beyer, Sherry Huang
Publikováno v:
Langmuir : the ACS journal of surfaces and colloids. 28(24)
Ultrasmall water-soluble silver nanoclusters are synthesized, and their properties are investigated. The silver nanoclusters have high colloidal stability and show fluorescence in the red. This demonstrates that like gold nanoclusters also silver nan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::155f521b8e7325fc0aa272627b36abd4
https://pubmed.ncbi.nlm.nih.gov/22444199
https://pubmed.ncbi.nlm.nih.gov/22444199
We study the transient photophysical properties of a diarylethene with a carboxylic anchor group by a combination of steady-state and ultrafast emission and absorption spectroscopy. After excitation of the closed-ring form, fluorescence with a quantu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f20efe1f6a7de4d809cad2b9d868eaa6
https://doi.org/10.1016/j.cplett.2012.05.077
https://doi.org/10.1016/j.cplett.2012.05.077
Autor:
Fritz Henneberger, S. Blumstengel, Sergei Kuehn, Sergey Sadofev, Sebastian Friede, Thomas Elsaesser
Publikováno v:
Applied Physics Letters. 103:191909
Elementary excitations at the polar (000-1) surface of a 20 nm pseudomorphically grown ZnO thin film are examined by steady state and time-resolved photoluminescence spectroscopy at low temperature. We control the density of emission centers through
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff50991f1dc7e9dcd1a714f55733e6b4
https://doi.org/10.1063/1.4829466
https://doi.org/10.1063/1.4829466