- Description:
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A measurement set-up is sought for that combines electrical transport with optical measurements to study the interplay between charge transport, light and magnetism in three-terminal devices comprising a variety of nano-objects. Nano-objects include individual (magnetic) molecules, nanoparticles made from Prussian Blue or spin-crossover compounds, or graphene nanoribbons. Electrodes will be made with e-beam lithography and the gate electrode is either formed a global one (the doped silicon substrate) or a local one formed by an metallic electrode nearby. Additionally, the set-up will be used to study magnetic phase transitions in two-dimensional magnetic membranes by purely mechanical means; electrical gates will be used to control and modify the phase transitions.
System requirements: - Cryo-free variable temperature system (<2 - 300 K);
- Cooldown below 100 K within 2 hours;
- Custom-made electrical wiring (36 twisted wires, 24-pin Fisher connectors on insert and chip holders that can accommodate the chip carriers used for the other cryogenic set-ups (He-4 insert and dilution refrigerator) in the vanderZant lab so that samples can be exchanged between them);
- Possibility to perform simultaneously (to electrical characterization) confocal microscopy with a movable sample stage (x,y,z). The confocal microscopy option makes it possible to measure for instance single-photon emission from graphene nanoribbon devices or photoconduction measurements on a variety of field-effect transistors made with nano-objects (e.g. light sensitive, magnetic molecules/nano-objects such as Prussian Blue nanoparticles);
- The system must have the capability to measure transport and perform optics in a perpendicular field of at least 9T (needed for spectroscopy on single-molecule devices);
- The system has to be compact; the system (and the handling of the insert in and out of cryostat) must fit within the present ceiling of the rooms (3.15 m) of the TNW Building 22;
- Finally, the system must have low-vibrational noise to perform the confocal microscopy experiments; a benchmark for the noise performance in this respect is that the system must be (mechanically) stable enough to be used for scanning probe measurements, i.e., vibration amplitudes must be subnanometer in size (<0.5 nm).
Note: Indien partij van mening is dat men invulling kan geven aan levering van een Cryo-free variable temperature system, die voldoet aan de genoemde specificaties, kan men zich uiterlijk tot 31 juli 12:00 uur melden via de berichten module van Negometrix.
- Type:
- Unsealed
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