A graphene-based hybrid material with quantum bits prepared by the double Langmuir–Schaefer method
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Date
2019-08-01
Authors
Hrubý, Jakub
Santana, Vinicius Tadeu
Kostiuk, Dmytro
Bouček, Martin
Lenz, Samuel
Kern, Michal
Šiffalovič, Peter
van Slageren, Joris
Neugebauer, Petr
0000-0003-4947-3688Advisor
Referee
Mark
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Abstract
The scalability and stability of molecular qubits deposited on surfaces is a crucial step for incorporating them into upcoming electronic devices. Herein, we report on the preparation and characterisation of a molecular quantum bit, copper(II)dibenzoylmethane [Cu(dbm)2], deposited by a modified Langmuir–Schaefer (LS) technique onto a graphene-based substrate. A double LS deposition was used for the preparation of a few-layer-graphene (FLG) on a Si/SiO2 substrate with subsequent deposition of the molecules. Magnetic properties were probed by high-frequency electron spin resonance (HF-ESR) spectroscopy and found maintained after deposition. Additional spectroscopic and imaging techniques, such as Raman spectroscopy (RS), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and scanning electron microscopy (SEM) were performed to characterise the deposited sample. Our approach demonstrated the possibility to utilise a controlled wet-chemistry protocol to prepare an array of potential quantum bits on a disordered graphene-based substrate. The deployed spectroscopic techniques showed unambiguously the robustness of our studied system with a potential to fabricate large-scale, intact, and stable quantum bits.
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Citation
RSC Advances. 2019, vol. 9, issue 42, p. 24066-24073.
https://pubs.rsc.org/en/content/articlelanding/2019/RA/C9RA04537F#!divAbstract
https://pubs.rsc.org/en/content/articlelanding/2019/RA/C9RA04537F#!divAbstract
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Peer-reviewed
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en