Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Madis Umalas"'
Autor:
Hugo Mändar, Martin Timusk, T. Käämbre, Kathriin Utt, Jörgen Metsik, Madis Umalas, Laurits Puust, Ilmo Sildos, Agnes Kuus, Uno Mäeorg
Publikováno v:
Polymer Degradation and Stability. 126:170-178
Sufficient stability of conductive polymers is crucial for allowing widespread application of these materials. Poly(3,4-ethylenedioxythiophene) (PEDOT) has a relatively high conductivity and transparency among conductive polymers. In this study, the
Autor:
Rünno Lõhmus, Kristjan Saal, Boris Polyakov, Maret Tamme, Leonid M. Dorogin, Rando Saar, Sergei Vlassov, Madis Umalas, Mikk Vahtrus
Publikováno v:
Materials Characterization. 107:119-124
We investigate the applicability of alumina nanofibers as a potential reinforcement material in ceramic matrix compounds by comparing the mechanical properties of individual nanofibers before and after annealing at 1400 °C. Mechanical testing is per
Autor:
Rünno Lõhmus, Der-Liang Young, Ants Lõhmus, Madis Umalas, Valter Reedo, Simo-Pekka Hannula, Irina Hussainova, Erkin Cura
Publikováno v:
Materials Chemistry and Physics. 153:301-306
The TiC–ZrC binary compound of nanostructured powders was synthesised by combination of sol–gel and carbothermal reduction. The polymeric precursor of the blend was produced by sol–gel process from titanium tetrabutoxide, zirconium tetrabutoxid
Autor:
Ants Lõhmus, Madis Umalas, Alexey E. Romanov, Leonid M. Dorogin, Rando Saar, Rünno Lõhmus, Sergei Vlassov, Boris Polyakov, Ilmar Kink
Publikováno v:
Journal of Crystal Growth. 410:63-68
In this paper we report an electron beam induced rapid (up to several tens of nm/s) growth of silver nanowhiskers from silver nanowire networks coated with TiO 2 by sol–gel method. Different growth conditions are tested and it is demonstrated that
Autor:
Rando Saar, Madis Umalas, Rünno Lõhmus, Mikk Antsov, Ilmar Kink, Boris Polyakov, Leonid M. Dorogin, Magnus Mets, Sergei Vlassov
Publikováno v:
Materials Chemistry and Physics. 143:1026-1031
This paper reports in situ mechanical characterization of silver nanowires (Ag NWs) inside a scanning electron microscope using a cantilevered beam bending technique. Measurements consisted in controlled bending of a cantilevered NW by the tip of an
Publikováno v:
Key Engineering Materials. 527:62-67