http://www.mo6.comStay up to date with the latest developments at Mo6: new site content, the latest info and press releases.en-us144014/12/2007 0:00:00The conductivity of MoSi nanowires is thought to be limited by defects and imperfections. With improved processing techniques the conductivity of MoSI material has increased more than thousand fold in three years since the material was first synthesised in bulk quantities, until recently reaching values of 10 S/m. In a new development, Maagnus Hummelgard and Hakan Olid from Sweden have repeatedly achieved dramatic improvements in conductivity, with the current best value of 80 000 S/m and cricital current densities of more than 10^6 amperes per square centimeter. They achoeved this by passing high currents through nanowires using a specially modified transmission electron microscope insert.12/12/2007 0:00:00Mo6S3I6 nanowire networks change their resistance in response to the presence of analyte vapors. The vapor sensing behaviour is quantitatively described very well phenomenologically in terms of the concentration of adsorbed analyte molecules in the contact tunneling junctions. The time-response of the sensor is observed to follow simple adsorption-desorption kinetics. The network sensor shows very clear selectivity, whereby the response is related to the dipole moment of the analyte. The response function favours rapid detection of small analyte concentrations. The work is described in the American Chemical Society journal Chemistry of Materials (to appear in early 2008)http://complex.ijs.si/F7publications/Nanomagnetism.html11/12/2007 0:00:00Vertically aligned bundles of molybdenum-sulphur-iodine nanowires (MoSIx) were grown on a molybdenum foil, thin wire and quartz substrate. By choosing different growth parameters we have been able to vary the surface density from ~0.01 to 0.5 bundles/µm2 and the length of the nanowire bundles from ~30 µm - 15 mm. In the case of growth on molybdenum, resistivity measurements show that a good electrical contact exists between the bundles and the metal substrate. Published online today, 11 December 2007, in Journal of Applied Physics (Vol.102, Issue 11): DOI: 10.1063/1.2820009 The nanowires are found to have excellent field emission properties, competitive with state-of-the-art carbon nanotube large-area field emitters. http://link.aip.org/link/?JAP/102/11430810/06/2007 0:00:00Experiments performed using the open aperture Z-scan technique at 532 nm and 1064 nm show optical limiting behaviour of Mo6S4.5I4.5. The NLE was compared with that for a stabilized multi-walled carbon nanotube (MWNT)-polymer composite dispersion. The uniformity of the MoSI dispersion in terms of both diameter and electronic behaviour makes MoSI nanowires of particular interest. More details are given by Werner Blau and collaborators in Chemical Physics Letters (p.435 (2007) p.109.) 8/05/2007 0:00:00in a nanomechanical investigation of moSi nanowire bundles, Andras Kis and collaborators (EPFL) have shown that MoSi nanowires havesurprisingly large Young's moduli, around 420 GPa. This compares very well with the highest measured values of around 1000 GPa for SWCNTs. The authors note that the extremely low observed shear modulus makes the materials suitable for solid stateklubricants or lubricant additive, especialy considering their good dispersion characteristics. Reference: A.Kis et al., Small 3,1544 (2007)