Reverse saturable absorption of fullerodendrimers in porous SiO2 sol–gel matrices |
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| Affiliation: | 1. Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS Unité Mixte 7504, CNRS––ULP), 23 rue du Loess, B.P. 43, 67034 Strasbourg Cedex, France;2. Institut of Materials Science and Applied Research, Vilnius University, Sauletekio 10, Lithuania;3. Ioffe Physical–Technical Institut, Politekhnicheskaja 26, 194021 St. Petersburg, Russia;1. Department of Tumor Biology, Institute for Cancer Research, Division of Cancer, Surgery and Transplantation, Oslo University Hospital, Oslo, Norway;2. The K.G. Jebsen Center for Breast Cancer Research, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway;3. Institute for Pharmacy, Faculty of Health Science, University of Tromsø, Tromsø, Norway;1. CSIR-Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), Kukrail Picnic Spot Road, P.O. CIMAP, Lucknow 226015, India;2. CSIR-Central Drug Research Institute (CSIR-CDRI), B.S. 10/1, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India;1. Department of Industrial Engineering, 3700 O’Hara Street, University of Pittsburgh, Pittsburgh, PA 15261, USA;2. Department of Engineering, Hope College, Holland, MI 49423, USA;3. Biological and Nanoscale Technologies Division, UES Inc., Dayton, OH 45432, USA;4. Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright Patterson Air Force Base, OH 45433, USA;1. Institute for Experimental Cancer Research in Pediatrics, Goethe-University, Frankfurt, Germany;2. Department of Medicine, Hematology/Oncology, Goethe-University, Frankfurt, Germany;1. Department of Physics, Harbin Institute of Technology, Harbin 150001, China;2. College of Chemistry and Environment Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding 071002, China;3. Key Laboratory of Organic Synthesis of Jiangsu Province, Soochow University, Suzhou 215123, China;4. School of Physical Science and Technology, Soochow University, Suzhou 215006, China |
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| Abstract: | The non-linear absorption properties and the dynamics of porous sol–gel SiO2 glasses, doped with fullerodendrimers, i.e., fullerene derivatives functionalized with dendritic branches have been investigated using a double-pump–probe technique. A frequency doubled mode locked Nd:YAG laser (25 ps (FHWM), 532 nm) was applied as irradiation source. A reverse saturable absorption (induced absorption) in the samples containing the fullerodendrimers has been observed. A similar induced absorption was also obtained in the pure C60 samples. In addition, the dendritic branches, which prevent aggregation of the molecules, lead also to an increase of the triplet quantum yield due to a faster singlet–triplet relaxation. |
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