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http://hdl.handle.net/1942/17744
Title: | Large piezoresistive effect in surface conductive nanocrystalline diamond | Authors: | JANSSENS, Stoffel DRIJKONINGEN, Sien HAENEN, Ken |
Issue Date: | 2014 | Publisher: | AMER INST PHYSICS | Source: | APPLIED PHYSICS LETTERS, 105 (10) | 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. | Document URI: | http://hdl.handle.net/1942/17744 | ISSN: | 0003-6951 | e-ISSN: | 1077-3118 | DOI: | 10.1063/1.4895458 | ISI #: | 000342758700014 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2015 |
Appears in Collections: | Research publications |
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