Synthesis, structures and electrical transport properties of the La2−xSrxNiTiO6−δ (0 ≤ x ≤ 0.5) perovskite series: In this hot article French and Spanish scientists investigate the synthesis, structures and electrical transport properties of double perovskites. The La2−xSrxNiTiO6−δ series shows a p–n transition in the pO2 range 10−18–10−19 atm. In air, the conductivity increases with increasing acceptor–dopant concentration. In reducing atmospheres, the Sr-free material is the most conductive. (J. Mater. Chem., 2011, 21, 13195-13204)
Production of monoclonal antibodies from hybridoma cells immobilized in 3D sol–gel silica matrices: Hybridoma cells immobilized in sol–gel silica matrices can be used for in vitro production of monoclonal antibodies say Argentinean scientists. The team evaluated different matrices looking at cell viability and antibody diffusion to surrounding media as well as the physicochemical properties of the polymeric material. Hybridoma cells immobilized in THEOS matrices were able to produce monoclonal antibodies to the same extent as free cells, which the team claim could allow them to be used in the design of bioreactors for large-scale production of antibodies. (J. Mater. Chem., 2011, 21, 13865-13872)
Monolayer and multilayer assemblies of spherically and cubic-shaped iron oxide nanoparticles: Nanoparticle thin films form surfaces with properties that make them attractive for many electronic, optical and magnetic devices. The assembly spherically shaped iron oxide nanoparticles and cubic-shaped nanoparticles is investigated in this hot paper using the Langmuir–Blodgett technique. (J. Mater. Chem., 2011, DOI:10.1039/C1JM12012C, Advance Article)
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