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SPEAKER: Ernesto Joselevich from Weizmann Institute of Science, Rehovot, Israel
TOPIC: Guided Nanowires: New Building Blocks for Self-Integrated Nanosystems
WHEN: November 30, 2016, from 14:00
WHERE: Room P6, Faculty of Mechanical Engineering, Brno Unviersity of Technology, Technická 2, Brno
The large-scale assembly of NWs with controlled orientation on surfaces remains one challenge toward their integration into practical devices. We report the VLS growth of perfectly aligned, millimeter-long, horizontal NWs of GaN [1], ZnO [2], ZnSe [3], ZnTe [4], CdSe [5] and other materials, with controlled crystallographic orientations on different planes of sapphire [1-5], SiC [6], quartz [7], and spinel [8]. The growth directions and crystallographic orientation of the NWs are controlled by their epitaxial relationship with the substrate, as well as by a graphoepitaxial effect that guides their growth along surface steps and grooves. As a proof of concept for future applications, we demonstrate the massively parallel “self-integration” of NWs into circuits via guided growth [9].
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