The field emission (FE) properties of nanowires made from the recently synthesized nanowire material Mo 6 S 3 I 6 are reported. A single nanowire was mounted on an indium-coated nickel holder by dielectrophoresis in isopropyl alcohol. A careful activation or conditioning in a vacuum of 10 −7 mbar was shown to be indispensable in order to extract relatively stable FE currents in excess of 1 µA originating from only a few sites at the end of the nanowire. Measurements were performed in an FE microscope with an additional plane mesh, which enables us to record I – U characteristics in diode mode, or to observe the emission patterns in triode mode. With FE currents around 5–7 µA the emitter degrades gradually, and to some extent irreversibly. The degradation mechanism is not a reversal of the instant site build-up.
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Žumer et al. (2005) studied this question.
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