TY - CONF A1 - Mantion, Alexandre T1 - Silver nanoparticles and synchrotron light-based nanotoxicology: new imaging modalities T2 - JUM@P´11: Second Joint Users´ Meeting@PSI, Paul Scherrer-Institut CY - Villigen, Switzerland DA - 2011-09-15 PY - 2011 AN - OPUS4-23979 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mantion, Alexandre T1 - New chiral peptide-coated silver nanoparticles for Material Science and Toxicology T2 - 25th ECIS Conference and the 45. Hauptversammlung der Kolloidgesellschaft CY - Berlin, Germany DA - 2011-09-04 PY - 2011 AN - OPUS4-23977 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mantion, Alexandre T1 - New silver nanoparticles for imaging applications: Initial data on their effects in cell culture model systems T2 - ANAKON 2010 CY - Zurich, Switzerland DA - 2010-03-23 PY - 2010 AN - OPUS4-24078 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mantion, Alexandre T1 - A novel type of silver nanoparticles and their advantages in toxicity testing in cell culture systems T2 - 5. Innovationskongress Chemie und Biotechnologie /Kleine Partikel - große Chancen CY - Potsdam, Germany DA - 2011-05-19 PY - 2011 AN - OPUS4-24060 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mantion, Alexandre T1 - A novel type of silver nanoparticles and their advantages in toxicity testing in cell culture systems T2 - INRS Occupational Health Research Conference 2011: Risks associated to Nanoparticles and Nanomaterials CY - Nancy, France DA - 2011-04-05 PY - 2011 AN - OPUS4-24259 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mantion, Alexandre T1 - Cytotoxicity of model silver nanoparticles in human macrophages T2 - Post-satellite Meeting Eurotox 2009 CY - Dresden, Germany DA - 2010-04-23 PY - 2010 AN - OPUS4-21038 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mantion, Alexandre T1 - Cytotoxicity of model silver nanoparticles in human macrophages T2 - Nanotoxicology 2010 CY - Edinburgh, Scotland DA - 2010-06-02 PY - 2010 AN - OPUS4-21037 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mantion, Alexandre T1 - A novel type of silver nanoparticles and their advantages in toxicity testing in cell systems T2 - 5th International Conference on Nanotechnology- Occupational and Environmental Health CY - Boston, MA, USA DA - 2011-08-09 PY - 2011 AN - OPUS4-24226 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mantion, Alexandre A1 - Graf, P. A1 - Florea, I. A1 - Haase, A. A1 - Thünemann, Andreas A1 - Masic, A. A1 - Ersen, O. A1 - Rabu, P. A1 - Meier, W. A1 - Luch, A. A1 - Taubert, A. T1 - Biomimetic synthesis of chiral erbium-doped silver/peptide/silica core-shell nanoparticles (ESPN) N2 - Peptide-modified silver nanoparticles have been coated with an erbium-doped silica layer using a method inspired by silica biomineralization. Electron microscopy and small-angle X-ray scattering confirm the presence of an Ag/peptide core and silica shell. The erbium is present as small Er2O3 particles in and on the silica shell. Raman, IR, UV-Vis, and circular dichroism spectroscopies show that the peptide is still present after shell formation and the nanoparticles conserve a chiral plasmon resonance. Magnetic measurements find a paramagnetic behavior. In vitro tests using a macrophage cell line model show that the resulting multicomponent nanoparticles have a low toxicity for macrophages, even on partial dissolution of the silica shell. KW - Nanoparticle KW - Small-angle X-ray scattering KW - SAXS PY - 2011 DO - https://doi.org/10.1039/c1nr10930h SN - 2040-3364 SN - 2040-3372 VL - 3 IS - 12 SP - 5168 EP - 5179 PB - RSC Publ. CY - Cambridge AN - OPUS4-25422 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Niehoff, A. A1 - Mantion, Alexandre A1 - McAloney, R. A1 - Huber, Alexandra A1 - Falkenhagen, Jana A1 - Goh, C.M. A1 - Thünemann, Andreas A1 - Winnik, M. A. A1 - Menzel, H. T1 - Elucidation of the structure of poly(gamma-benzyl-L-glutamate) nanofibers and gel networks in a helicogenic solvent N2 - The synthesis, characterization, self-assembly, and gel formation of poly(γ-benzyl-L-glutamate) (PBLG) in a molecular weight range from ca. 7,000–100,000 g/mol and with narrow molecular weight distribution are described. The PBLG is synthesized by the nickel-mediated ring-opening polymerization and is characterized by size-exclusion chromatography coupled with multiple-angle laser light scattering, NMR, and Fourier transform infrared spectroscopy. The self-assembly and thermoreversible gel formation in the helicogenic solvent toluene is investigated by transmission electron microscopy, atomic force microscopy, small-angle X-ray scattering, and synchrotron powder X-ray diffraction. At concentrations significantly below the minimum gelation concentration, spherical aggregates are observed. At higher concentrations, gels are formed, which show a 3D network structure composed of nanofibers. The proposed self-assembly mechanism is based on a distorted hexagonal packing of PBLG helices parallel to the axis of the nanofiber. The gel network forms due to branching and rejoining of bundles of PBLG nanofibers. The network exhibits uniform domains with a length of 200±42 nm composed of densely packed PBLG helices. KW - Poly(gamma-benzyl-L-glutamate) (PBLG) KW - Nickel-mediated NCA polymerization KW - Thermoreversible gel formation KW - Physical/supramolecular organogel KW - Nanofiber KW - Self-assembly KW - Alpha-helix KW - Nanotechnology KW - Small-angle X-ray scatering KW - SAXS PY - 2013 DO - https://doi.org/10.1007/s00396-012-2866-9 SN - 0303-402X SN - 1435-1536 VL - 291 IS - 6 SP - 1353 EP - 1363 PB - Springer CY - Berlin AN - OPUS4-28615 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -