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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/17744

Title: Large piezoresistive effect in surface conductive nanocrystalline diamond
Authors: Janssens, Stoffel
Issue Date: 2014
Abstract: Surface conductivity in hydrogen-terminated single crystal diamond is an intriguing phenomenon for fundamental reasons as well as for application driven research. Surface conductivity is also observed in hydrogen-terminated nanocrystalline diamond although the electronic transport mechanisms remain unclear. In this work, the piezoresistive properties of intrinsic surface conductive nanocrystalline diamond are investigated. A gauge factor of 35 is calculated from bulging a diamond membrane of 350 nm thick, with a diameter of 656 mu m and a sheet resistance of 1.45 M Omega/sq. The large piezoresistive effect is reasoned to originate directly from strain-induced changes in the resistivity of the grain boundaries. Additionally, we ascribe a small time-dependent fraction of the piezoresistive effect to charge trapping of charge carriers at grain boundaries. In conclusion, time-dependent piezoresistive effect measurements act as a tool for deeper understanding the complex electronic transport mechanisms induced by grain boundaries in a polycrystalline material or nanocomposite. (C) 2014 AIP Publishing LLC.
Notes: [Janssens, S. D.; Drijkoningen, S.; Haenen, K.] Hasselt Univ, Inst Mat Res IMO, B-3590 Diepenbeek, Belgium. [Janssens, S. D.; Haenen, K.] IMEC VZW, IMOMEC, B-3590 Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/17744
DOI: 10.1063/1.4895458
ISI #: 000342758700014
ISSN: 0003-6951
Category: A1
Type: Journal Contribution
Validation: ecoom, 2015
Appears in Collections: Research publications

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