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Strong piezoelectricity in individual GaN nanowires

  • Majid Minary-Jolandan (a1), Rodrigo A. Bernal (a1) and Horacio D. Espinosa (a1)

GaN nanowires are promising building blocks for future nanoelectronics, optoelectronic devices, and nanogenerators. Here, we report on strong piezoelectricity in individual single-crystal GaN nanowires revealed by direct measurement of the piezoelectric constant using piezoresponse force microscopy. Our experimental results show that individual c-axis GaN nanowires, with a characteristic dimension as small as 65 nm, show a shear piezoelectric constant of d15 ~ 10 pm/V, which is several times that measured in bulk. The revealed strong piezoelectricity could open promising opportunities for application of GaN nanowires in nanowire-based sensors and generators for self-powered nanodevices.

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Address all correspondence to Horacio D. Espinosa at
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MRS Communications
  • ISSN: 2159-6859
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