Current-induced nanogap formation and graphitization in boron-doped diamond films
V. Seshan, C. R. Arroyo, A. Castellanos-Gomez, F. Prins, M. L. Perrin,, S.D. Janssens, K. Haenen, M. Nesl\'adek, E.J.R. Sudh\"olter, L.C.P.M. de, Smet, H.S.J. van der Zant, and D. Dulic
TL;DR
This study demonstrates a high-current annealing method to create nanogaps and hybrid diamond/graphite structures in boron-doped diamond films, revealing structural transformations via microscopy and spectroscopy.
Contribution
Introduces a feedback-controlled current annealing process to fabricate nanogaps and hybrid structures in boron-doped diamond films, with detailed characterization.
Findings
Nanogaps down to 1 nm were successfully fabricated.
Hybrid diamond/graphite structures form at maximum heat points.
Structural changes confirmed by Raman spectroscopy.
Abstract
A high-current annealing technique is used to fabricate nanogaps and hybrid diamond/graphite structures in boron-doped nanocrystalline diamond films. Nanometer-sized gaps down to 1 nm are produced using a feedback-controlled current annealing procedure. The nanogaps are characterized using scanning electron microscopy and electronic transport measurements. The structural changes produced by the elevated temperature, achieved by Joule heating during current annealing, are characterized using Raman spectroscopy. The formation of hybridized diamond/graphite structure is observed at the point of maximum heat accumulation.
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